Facebook Twitter Google+LinkedInPinterestWhatsAppHouse of assembly is opened for business today and there will be six first reading of bills most of which come from the Ministry of Health & Human Services and include the Mental Health Bill and Health Appeals Tribunal Bill.There are eleven parliamentary questions including a request for update on the escaped detainees from the Detention Center; whether there will be more police added to the squad in South Caicos; how many new people were hired in the public sector and of the Border Control Minister, why he suddenly ceased processing of status documents for a month this past April, with less than a day’s notice.Top on the HOA agenda is the presentation by the Finance Minister of Turks and Caicos Islands Airports Authority Financial Statements for the year ended, March, 2015. Recommended for you Facebook Twitter Google+LinkedInPinterestWhatsApp Budget cuts hurt, but necessary says TCI Deputy Premier in parliamentary debate on hurricane funds TCI Premier blasts Opposition side for “slop” information, sets it straight in HOA Minister of Works puts government buildings reconstruction post hurricanes at $8.6m Related Items:HOA, house of assembly, Minister, ministry of health, politics
Related Items: Facebook Twitter Google+LinkedInPinterestWhatsApp Facebook Twitter Google+LinkedInPinterestWhatsApp#TurksandCaicos, September 12, 2017 – Providenciales – To all interested Parties: The Department of Disaster Management and Emergencies (DDME) takes this opportunity to appreciate your goodwill during this time for the Turks and Caicos Islands (TCI).Please note, the established process for engaging the TCI Government to donate relief items is as follows:-1. An official letter providing the list of items, quantities, values, port origin and proposed schedule time for arrival in the Providenciales Port;2. An official letter providing the names of all persons, along with copies of his/her respective passport bio-data page;3. Any other supporting information.Upon receipt of the information, the DDME will process your documents and respond providing the necessary clearance.Please contact the DDME at firstname.lastname@example.org should your require any additional clarification.Regards,Department of Disaster Management and Emergencies
The Rossoneri general director has backed coach Gennaro Gattuso and hopes his team can do well in the Italian Lega Serie AFor AC Milan general director Leonardo, his team doesn’t have to be obsessed to win the UEFA Champions League and has to focus on the Italian Lega Serie A.“For a club like Milan, of course, the objective must be to get back into the most important European competition,” Leonardo was quoted by Football Italia.Serie A Betting: Match-day 3 Stuart Heath – September 14, 2019 Considering there is a number of perfect starts so early in the Serie A season, as well as a few surprisingly not-so perfect ones….“We believe that we have the ideal structure in place to achieve this target, but we mustn’t make the mistake of turning it into an obsession.”“At the moment, we are three points off fourth place with a game in hand, so perfectly in line with our ambitions,” he added.“The rumors on Rino came from outside the club, and as far as we are concerned, they are to be considered unfounded. This is why we didn’t need to release a statement denying it because Rino knows he has the full faith of the club and squad.”
Manchester United legend Gary Neville believes Marcus Rashford has the potential to go beyond becoming a top-class playerThe 21-year-old striker appears to be another star who has benefitted from Jose Mourinho’s departure at Old Trafford after struggling for regular starts.This led to uncertainty surrounding Rashford’s future with ex-United star Garth Crooks accusing Mourinho of “killing” him last month.Under interim coach Ole Gunnar Solskjaer, however, Rashford has been given a new lease of life with the Norwegian playing him in a central forward role.And Rashford has repaid Solskjaer’s faith by scoring three goals in his four matches in charge of United, which has kept Romelu Lukaku benched.“The spring in the counter-attack is there and Rashford playing up front is fantastic – I love him to bits,” Neville told Sky Sports.Maguire says United need to build on today’s win George Patchias – September 14, 2019 Harry Maguire wants his United teammates to build on the victory over Leicester City.During the summer, Harry Maguire was referred to as the ultimate…“He’s played nearly 150 games at the age of 21 and his potential is enormous. It’s actually now stepping up beyond the potential to where he will be a top-class player.“People will talk about Romelu Lukaku and how is he getting back in the team – don’t worry about that, worry about the kid that’s playing that’s going to devastate teams.“He gives them mobility. They just need more energy up front. Lukaku has not been at his best.“He has earned his chance. He gives them something different and he is a fantastic player.“He is on the right trajectory to become something really special for Manchester United.”The Red Devils will next face Reading in the FA Cup on Saturday.
KUSI Newsroom Deported veteran denied entry into U.S. at San Ysidro Port of Entry Categories: Local San Diego News FacebookTwitter Posted: July 17, 2019 KUSI Newsroom, July 17, 2019 SAN DIEGO (KUSI) – A deported Marine Corps veteran from Belize has been trying to become a U.S. citizen since 1995 and was recently denied entry to the United States when he asked to be let in for a scheduled citizenship interview, it was reported today.Roman Sabal, 58, came to the San Ysidro Port of Entry around 7:30 a.m. Monday with an attorney to ask for “parole” to attend his naturalization interview scheduled for shortly before noon in downtown San Diego, the San Diego Union-Tribune reported.Instead, he was turned away even though border officials have the authority to temporarily allow people into the country on parole for “humanitarian or significant public benefit” reasons, according to the newspaper.Sabal first applied to become a U.S. citizen in 1995 after serving for six years as a Marine and then several more years in the Army Reserves, the Union-Tribune reported. He has two U.S. citizen children and with a U.S. citizen woman, whom he hopes to marry one day.He initially came to the U.S. on a tourist visa and did not have permission to stay in the U.S. permanently.After seeing Marines in action during his time in the Belizean military, he came with the goal of enlisting in the Marine Corps and managed to join with a fake identity document, according to the Union-Tribune.He told the newspaper that he confessed during boot camp and was told, “Don’t worry about it. You’re a Marine now.”Years after he was honorably discharged, he decided to go back to Belize because he had developed diabetes, and his mother had offered to help him treat it with herbal remedies rather than pharmaceuticals, the newspaper reported.When he returned to the U.S., his entry triggered an immigration court case.Sabal never found out about the hearing and a judge ordered him deported in his absence, so when he returned to Belize again in 2008 for more treatment, he found himself stuck there, according to the Union-Tribune.Sabal and his attorney, Victoria Starrett, crossed onto U.S. soil on Monday and gave Customs and Border Protection officials paperwork detailing his case and his request to enter the country to attend his interview, the Union-Tribune reported.Starrett told the newspaper that CBP officials waved them to the side then eventually told them to go through Immigration and Customs and Enforcement to request parole, but those officials sent them back to Mexico.Some ICE officers work out of the port of entry, but it was not clear whether they were involved in the incident on Monday, the newspaper reported.Starrett told the newspaper that Sabal’s legal team will likely have to file a lawsuit in federal court to get him access to the citizenship process.Sabal told the newspaper on Monday that he plans to wait in Tijuana for a few days to see if the situation can be resolved quickly, but otherwise he will have to travel back to Belize and try again at a later date. Updated: 3:49 PM
WILMINGTON, MA — As its meeting tonight, the Wilmington School Committee approved Thursday, June 21, 2018 as the last (180th) day of school for Wilmington Public Schools for the 2017-2018 school year.“It’s been a trying year with the snow, and rain & wind storms,” said Interim Superintendent Paul Ruggiero. “We have had 7 inclement days. The first one was October 30, then three in January, and three in March.”“Even with seven inclement days, we’re still in pretty good shape,” noted Ruggiero.Ruggiero pointed out that many school districts that started school after Labor Day was running into scheduling issues, including extending the school days, losing a day during April vacation, and/or going to school on some Saturdays.The last day of school will be an early release day for all grades.As a reminder, as the School Committee previously approved in February, the first day of the 2018-2019 school year for grades 1-12 will be Tuesday, August 28, 2018.Kindergarteners will begin on Tuesday, September 4, 2018.Like Wilmington Apple on Facebook. Follow Wilmington Apple on Twitter. Follow Wilmington Apple on Instagram. Subscribe to Wilmington Apple’s daily email newsletter HERE. Got a comment, question, photo, press release, or news tip? Email email@example.com.Share this:TwitterFacebookLike this:Like Loading… RelatedSCHOOL COMMITTEE NEWS: Last Day Of School Officially AnnouncedIn “Education”SCHOOL COMMITTEE NEWS: Last Day Of School Officially AnnouncedIn “Education”NAME CHANGE: ‘Guidance Counselors’ Now Referred To As ‘School Counselors’ In WilmingtonIn “Education”
WILMINGTON, MA — Based on information provided at Monday night’s Board of Selectmen’s Meeting, here are some of the latest developments in the effort to construct a detox facility at 362 Middlesex Avenue.The Board of Appeals has an important meeting tonight (Wednesday) at 7pm in the Town Hall Auditorium on this matter.#1) At tonight’s meeting, the Board of Appeals will review and possibly vote on the draft written decision that was made at its January 16 meeting to deny the special permit request of the applicants.“Town Counsel Jonathan Silverstein has prepared a decision that is intended to reflect both the vote that was taken and the basis for the decision to deny the special permit,” Town Manager Jeff Hull told Selectmen. “If the decision is finalized at that meeting, it must then be filed with the Town Clerk.”#2) If a majority of Board of Appeals members were to disapprove the draft for some reason, the vote denying the special permit would NOT change.“This is NOT an opportunity to change the substance of the decision,” said Town Counsel Mark Rich in response to a question raised by Selectman Mike McCoy. “The Zoning Board of Appeals must come to an agreement on how that decision will be translated. They’ll be discussing the language of the report that goes to the Town Clerk. This is NOT an opportunity to reconsider the vote that denied the special permit… The intent is to have a defensible decision for the Town Clerk as that’s going to be the matter of any appeal… That it accurately and appropriately reflects the comments and positions of the [board members] and how they voted.”#3) Also at tonight’s meeting, the Board of Appeals will discuss the process to follow for consideration of a request from the applicant for a reasonable accommodation.“The Board will consider, with the advice of [Town Counsel] Jonathan Silverstein, whether or not to conduct the meeting as a public hearing and will receive counsel’s opinion as to whether the decision to grant a reasonable accommodation requires a simple majority or a ‘supermajority,’ added Hull.#4) Town Counsel Jonathan Silverstein has communicated with Town Manager Hull that he intends on recommending to the Board of Appeals that (1) the board DOES conduct a public hearing and (2) the decision to grant the reasonable accommodation would require a SUPERMAJORITY (i.e., 4-1 or 5-0), NOT a simple majority. KP Law believes the governance of the town would still apply in this case.#5) The Board of Appeals will NOT actually consider whether or not to grant the reasonable accommodation at tonight’s meeting, and it may be awhile before it does so.“The Board’s next scheduled meeting on March 13, 2019 apparently has a full agenda, which may mean that the reasonable accommodations matter is scheduled for a later date,” cautioned Hull.#6) The Concerned Citizens of Wilmington recently provided the Zoning Board of Appeals and Board of Selectmen with a letter arguing that the federal American with Disabilities Act may not be invoked to supersede local zoning bylaws. A ruling from the Sixth Circuit Court (Get Back Up, Inc. vs. City of Detroit & City of Detroit Board of Appeals) was provided as support.The letter also argued that the residents of Wilmington have already made “reasonable accommodations” to those suffering from substance abuse by amending the zoning bylaw to allow for the construction of future detox facilities in industrial zoned areas that are “remote, quiet, and more conducive to those individuals undergoing the torments of withdrawal.”Prior to summarizing the letter for the Board of Selectmen, Town Manager Jeff Hull took an opportunity to clear up any implication that Town Counsel Jonathan Silverstein hadn’t been evaluating the case.“[Attorney Silverstein] has looked at a number of different cases. He’s a specialist in land use law. I think it needs to be made very clear to the public that he is on top of this. He has many years of experience in land use law,” stressed Hull.A letter from Silverstein was read into the record at the end of Monday’s meeting, which, in part, reemphasized Hull’s assurances that Town Counsel has been handling the case appropriately.#7) Resident Suzanne Sullivan criticized the Board of Selectmen for, in her opinion, failing to protect and defend the bylaws of the town. She read a section of the Wilmington Board of Appeals’ rules and regulation:“The discussion about this accommodation, in our minds, is illegal,” continued Sullivan. “There is no basis for them to be coming to the Board of Appeals and this town is setting up a process that is counter to the bylaws of the town. And this isn’t only town bylaws, it’s the state statute… Are we going to have to sit here and listen to this ‘fake process’ coming forward?… I’ve yet to hear how under what law they can come forward with an accommodation petition after they just got a denial on a special permit from the Zoning Board of Appeals. I still don’t have that answer…. This is not allowed. It was voted down. Plain and simple. Deal with it. They have a recourse — it’s called land court.”#8) Resident Rob Fasulo urged the Board of Selectmen to reconsider its decision not to enter into Executive Session to discuss Board of Appeals Chair Dan Veerman and any perceived “liability issues” he causes the town in this matter.“There’s been a lot of talk about the Facebook post [in which he used the term “junkie”], began Fasulo. “I don’t remember hearing any talk of any other comments. I happened to be going back through the WCTV tapes. During the carnival debate, [right before] the 26-minute on the January 13 meeting video, [Veerman] is on record again using that questionable word. So now we have a long-term pattern of this usage. The concern over that is he really can only vote one way without getting the town into some trouble. If he votes no when this accommodation comes up, there will surely be an appeal on that fact alone.”“I’m not saying he’s a bad guy, but this situation needs to be looked at,” continued Fasulo. “Can he make a vote one way or the other without causing liability to the town? You guys need to do your job and at least have the discussion… Please reconsider the vote and go into Executive Session to discuss.”#9) Later in the evening, Selectman Mike McCoy requested that the Board of Selectmen, at an upcoming meeting, again consider entering Executive Session to discuss Board of Appeals Chair Dan Veerman. While no formal vote took place after McCoy made the motion, Selectman Chair Kevin Caira agreed to put it on the agenda for a future meeting. McCoy noted he planed on raising this issue even before Fasulo suggested it.At the February 11 meeting, the Board of Selectmen were stalemated 2-2 on whether or not to enter Executive Session, with Selectmen McCoy & Bendel voting in favor and Selectmen Caira and Loud voting against, with Selectman Eaton abstaining. As a result, the motion failed due to the lack of a majority. With Selectman Loud having resigned from the board, the math, and possibly outcome, of the next vote may be different.#10) Selectman Mike McCoy also made a request that, by the next Selectmen’s Meeting, he be provided with examples of other instances where the Wilmington Board of Appeals took a vote at one meeting and then took a vote on the original vote’s decision at a following meeting. He claimed it had never happened before. Town Counsel Mark Rich said it was not uncommon, but did not specify if he was speaking generally or Wilmington-specific.“In all my 30 years, I don’t think this has ever happened. I think when [the Board of Appeals] takes a vote, they deny it, and it automatically goes to the Town Clerk’s Office,” claimed McCoy. “Can anyone please tell me if there’s ever been a case, on file, similar to what we’re doing now for 362 Middlesex Ave, where there actually going to take a vote on a decision?”Like Wilmington Apple on Facebook. Follow Wilmington Apple on Twitter. Follow Wilmington Apple on Instagram. Subscribe to Wilmington Apple’s daily email newsletter HERE. Got a comment, question, photo, press release, or news tip? Email firstname.lastname@example.org.Share this:TwitterFacebookLike this:Like Loading… RelatedBREAKING: Detox Center Proposal For 362 Middlesex Avenue Officially Submitted To TownIn “Government”LAWSUIT FILED: Bettering LLC Sues Zoning Board Of Appeals Over Detox Facility DenialIn “Government”SELECTMEN NEWS: 5 Things That Happened At Monday’s MeetingIn “Government”
Sprint 458 ppi The iPhone XR, XS and XS Max are all available now. To put it all in perspective, check out the chart below, which compares the iPhone XS, XS Max, XR and last year’s X. Water-resistant (IP68), dual-SIM capabilities (nano-SIM and e-SIM), wireless charging, Face ID, Memoji None $999.00 See It Processor 64GB, 128GB, 256GB 6.14 oz.; 174 g Not disclosed, but Apple claims it will last 30 minutes longer than iPhone X Now playing: Watch this: iPhone XS: Why it’s harder than ever to pick the best… 5.9x3x0.33 in. Connector Mentioned Above Apple iPhone XS (64GB, space gray) None Aug 29 • New iPhones, Apple Watch and more: Apple’s September event preview iPhone X Dual 12-megapixel 5.8-inch Super Retina OLED; 2,436×1,125 pixels $749 (64GB), $799 (128GB), $899 (256GB) iPhone XS Max 5.8-inch; 2,436×1,125 pixels Water-resistant (IP67), wireless charging, Face ID 3D unlock, Memoji $999 6.5-inch Super Retina OLED; 2,688×1,242 pixels Pixel density Display size, resolution Headphone jack Water-resistant: IP67, dual-SIM capabilities (nano-SIM and e-SIM), wireless charging, Face ID, Memoji 458 ppi Not disclosed, but Apple claims it will last 90 minutes longer than iPhone X The iPhone XS Max behemoth shown from every angle iOS 11 No iPhone XS features vs. XS Max, XR, X Lightning 143.6×70.9×7.7 mm 7-megapixel with Face ID 64GB, 256GB 157.5×77.4×7.7 mm 6.8 oz.; 194 g Apple Event The iPhone XS, iPhone XS Max and iPhone XR phones are updates to 2017’s iPhone X, 8 and 8 Plus. The iPhone XS retains the familiar design of the iPhone X, including a 5.8-inch OLED display and stainless-steel sides. Apple also offers a larger version of the XS with a 6.5-inch OLED display called the iPhone XS Max.Read: iPhone 11: 8 features I want real badWith a footprint about the same size as the iPhone 8 Plus (though the older phone has a smaller 5.5-inch LCD display), the iPhone XS Max has the largest display found on any current iPhone. Not disclosed Aug 26 • Every Apple TV Plus show announced so far No AU$1,579 (64GB), AU$1,829 (256GB) Lightning Price (AUD) iOS 12 7-megapixel 7-megapixel with Face ID Single 12-megapixel 66 $999 (64GB), $1,149 (256GB) Dimensions (millimeters) Front-facing camera AU$1,229 (64GB), AU$1,299 (128GB), AU$1,479 (256GB) See also 5.7×2.79×0.3 in. iOS 12 143.6×70.9×7.7 mm Dual 12-megapixel 4K Lightning Not disclosed $1,099 (64GB), $1,249 (256GB), $1,449 (512GB) Apple A12 Bionic Apple iPhone XS at Amazon Storage Battery Lightning Price off-contract (USD) iPhone X specs compared with iPhone XS, XS Max and XR Phones $1,099 (64GB), $1,249 (256GB), $1,449 (512GB) $999 Expandable storage None (Face ID) Mobile software None (Face ID) 150.9×75.7×8.3 mm 4:51 iPhone XS Not disclosed The iPhone XS and XS Max come in silver, space gray and gold. Apple opted for more of a straw-colored gold this time than on previous gold iPhone models, which skewed closer to copper. £749 (64GB), £799 (128GB), £899 (256GB) iOS 12 Apple None (Face ID) Tags Fingerprint sensor RAM 7-megapixel with Face ID See All Boost Mobile None 6.24 oz.; 177 g £999 (64GB), £1,149 (256GB) The iPhone XS starts at $999, £999 or AU$1,629 for a 64GB model, while the iPhone XS Max costs $1,099, £1,099 or AU$1,799 for 64GB. All three new phones have a new A12 Bionic processor that Apple claims is 15 percent faster than last year’s A11 chip in the iPhone X.The iPhone XR has a single rear camera, and the XS and XS Max both have dual rear cameras like the iPhone X. reading • iPhone XS specs vs. XR, XS Max, X: What is the same and different Aug 30 • Apple will launch iPhone 11 on Sept. 10 in Cupertino See it No Dual 12-megapixel Aug 30 • iPhone 11, 11 Pro, 11R and 11 Max: Price, specs and features we expect on Sept. 10 19 Photos 64GB, 256GB, 512GB None (Face ID via TrueDepth camera) Then there’s the iPhone XR, which has a 6.1-inch LCD display and an aluminum and glass body instead of the stainless steel and glass of the XS and XS Max. The iPhone XR comes in white, black, coral, yellow, blue and red (Product Red) and costs $749, £749 or AU$1,229. That’s $50, £50 or AU$150 more than the iPhone 8 cost when it launched in 2017. The XR’s colors are a callback to the iPhone 5C. $999 4K $999 (64GB), $1,149 (256GB), $1,349 (512GB) None 64GB, 256GB, 512GB Camera Apple A12 Bionic 5.7×2.8×0.3 in. Comments Video capture Not disclosed, but Apple claims it will last 90 minutes longer than iPhone 8 Plus 6.1-inch LCD Retina Display; 1,792×828 pixels AU$1,799 (64GB), AU$2,049 (256GB), AU$2,369 (512GB) Share your voice The iPhone XS Max behemoth shown from every angle £999 (64GB), £1,149 (256GB), £1,349 (512GB) 51 Photos Everything Apple announced at its Sept. 12 event iPhone XR, XS, XS Max: Apple’s three new iPhones Watch Series 4 starts at $399, packs larger displays, ECG sensor Pics of the new iPhone XS and XS Max in all their glory Dimensions (inches) $999 Best Buy Water-resistant (IP68), dual-SIM capabilities (nano-SIM and e-SIM), wireless charging, Face ID, Memoji 458 ppi CNET Review Apple iPhone XS We’d recommend the iPhone XR first, but here’s what the XS brings to the table. Read Review 326 ppi iPhone XR Price (GBP) See It CNET may get a commission from retail offers. 4K Review • iPhone XS review, updated: A few luxury upgrades over the XR Apple A11 Bionic 6.2x3x.3 in. 51 Photos Preview • iPhone XS is the new $1,000 iPhone X Apple A12 Bionic Weight (ounces, grams) Not disclosed, but lasted 11.45 hours in CNET’s looped video playback test • AU$1,629 (64GB), AU$1,879 (256GB), AU$2,199 (512GB) Not disclosed See It No 7.3 oz.; 208 g Apple Event 4K Special features
US secretary of state Rex Tillerson speaks to staff members at the US Mission to the UN on 26 October 2017, in Geneva, Switzerland. AFPUS secretary of state Rex Tillerson urged Myanmar’s army chief Thursday to help end the violence in Rakhine state that has forced hundreds of thousands of Rohingya Muslims to flee.In a phone call with Min Aung Hlaing, Tillerson expressed “concern about the continuing humanitarian crisis and reported atrocities in Rakhine”, according to a statement by State Department spokeswoman Heather Nauert.“The Secretary urged Burma’s security forces to support the government in ending the violence in Rakhine state and allowing the safe return home of those displaced during this crisis, especially the large numbers of ethnic Rohingya,” she added, using Myanmar’s former name.More than 600,000 members of the minority Muslim group have fled across the border into Bangladesh in an intensifying crisis that began in late August.Militant attacks on Myanmar security forces in Rakhine sparked a major army crackdown on the group, who are labelled illegal Bengali immigrants by most Burmese.Tillerson, who paid a visit to Myanmar’s giant neighbor India earlier this week, urged the military in his phone call to facilitate humanitarian aid for those who have been displaced.He also told the army to “cooperate with the United Nations to ensure a thorough, independent investigation into all allegations of human rights abuses and violations and to ensure accountability,” said the statement.Washington announced on Monday it was pushing for targeted sanctions against officers from the Myanmar army involved in violence while withdrawing invitations to senior members of the security forces to visit the US, and ending travel waivers.The move came after Tillerson had said the US holds Myanmar’s military leadership “accountable” for the refugee crisis, drawing a distinction with Aung San Suu Kyi’s civilian government.Tillerson warned last week the world won’t stand and “be witness to the atrocities that have been reported,” adding that the military must be disciplined and “restrained.”Min Aung Hlaing has consistently defended his forces against accusations of having committed atrocities.“One-sided statements and accusations against Myanmar and security members over the terror attacks of extremist Bengalis in the west of Rakhine State are totally untrue,” he said in a post on his Facebook page Tuesday.Supporters say Rohingyas have been systematically deprived of basic rights over decades in majority Buddhist Myanmar.In the latest crackdown, Myanmar’s security forces have fired indiscriminately on unarmed civilians, including children, and committed widespread sexual violence, according to UN investigators.
(PhysOrg.com) — In key advances for the field of superconductivity, a research group has created versions of a class of widely studied superconducting compounds that are each one continuous crystal, rather than composed of many crystalline grains. These single-crystal materials are important achievements because they display better properties than polycrystalline types and are easier to study. In a series of four recent papers, three published in Physical Review B and one in Physical Review Letters, the researchers describe the process they developed to “grow” the single-crystal materials. They also lay out the basic but vital measurements they performed on them, including their molecular structures and how they transport charge.The group, which includes scientists from Ames Laboratory in Iowa, Iowa State University (ISU), and San Diego State University, created single-crystal versions of two iron arsenide superconductors, a class of superconductors currently being examined by researchers across the globe. However, most of these researchers are studying polycrystalline varieties, with only recent work coming out on single crystals.The first paper1 describes the barium/iron/arsenic superconductor BaFe2As2 and a compound derived from it that contains a slightly different amount of barium as well as small amounts of potassium (The potassium, in this context, is a “dopant” material that bolsters the material’s properties. Doping is common in superconductivity research.)”Growing single-crystal versions of these materials allows us to study their ‘anisotropic’ superconducting properties—their tendency to display superconductivity along one axis but not others,” said the group’s spokeperson, Ames Lab and ISU scientist Paul Canfield, to PhysOrg.com.The major result published in the first paper is a determination of the highest magnetic field the superconducting state can withstand (called the upper critical field) and an evaluation of how anisotropic it is. Some superconductors are extremely anisotropic, and so fully understanding them requires good measurements of this behavior.Canfield and his group show in their second paper2 that their single-crystal growth method can be applied to another iron arsenide compound, SrFe2As2 (where “Sr” is strontium).And in the third paper3, the researchers discuss a new member of the iron arsenides. The compound is CaFe2As2 (“Ca” is calcium) and it had never before been identified as a member of that particular crystallographic family.”The discovery of CaFe2As2 was very exciting,” said Canfield. “We learned that at a temperature of 170 K [degrees Kelvin, here equal to about -150 degrees Fahrenheit] the material undergoes exceptionally clear changes to its structure and magnetic behavior.”This type of temperature-induced changes are known as “first-order” transitions, and understanding how they occur—a task made easier when the changes are obvious—will aid in scientists’ knowledge of superconducting materials.The fourth paper4 in the series further documents their study of CaFe2As2, detailing exactly why the material can be classified as a superconducting iron arsenide. The researchers found that at modest pressures the structural and magnetic changes that occur at 170 K are suppressed and the material becomes a superconductor.”This means that, from a basic science point of view, CaFe2As2 offers a clean model system that seems to encompass all of the salient features of these compounds (structural, magnetic and superconducting phase transitions) and that its behavior can be tuned with pressure,” Canfield said. “This is a very exciting discovery that may help guide the way to understanding this new family of superconductors.”Citations:1Phys. Rev. B 78, 014507 (2008)2Phys. Rev. B 78, 024516 (2008)3Phys. Rev. Lett. 101, 057006 (2008)4Phys. Rev. B 78, 014523 (2008)Copyright 2008 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. Citation: ‘Single-Crystal’ Superconductors are a Big Step for the Field (2008, August 28) retrieved 18 August 2019 from https://phys.org/news/2008-08-single-crystal-superconductors-big-field.html A sample of a potassium-doped iron arsenide superconductor, shown on a millimeter grid. Image courtesy the American Physical Society [N. Ni et al. (10 July 2008). Anisotropic thermodynamic and transport properties of single-crystalline Ba1－xKxFe2As2 (x=0 and 0.45). Physical Review B, Vol 78, p014507, Fig 1] This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.