New type of Ti-rich HEA superconductors with high upper critical field

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Acta Materialia Pub Date : 2024-12-23 DOI:10.1016/j.actamat.2024.120666

Piotr Sobota, Bartosz Rusin, Daniel Gnida, Rafał Topolnicki, Tomasz Ossowski, Wojciech Nowak, Adam Pikul, Rafał Idczak

{"title":"New type of Ti-rich HEA superconductors with high upper critical field","authors":"Piotr Sobota, Bartosz Rusin, Daniel Gnida, Rafał Topolnicki, Tomasz Ossowski, Wojciech Nowak, Adam Pikul, Rafał Idczak","doi":"10.1016/j.actamat.2024.120666","DOIUrl":null,"url":null,"abstract":"Physical and structural properties of two high-entropy alloys (HEA), Ti<sub>0.5</sub>(ZrNbHfTa)<sub>0.5</sub> and Ti<sub>0.5</sub>(VNbHfTa)<sub>0.5</sub>, belonging to the new type of Ti-rich HEA were studied by powder x-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDXS), magnetization, electrical resistivity and specific heat measurements. The experimental results were supported by theoretical calculations of the electronic structure using projector augmented wave (PAW) within the density functional theory. Simulated structure relaxations with several degrees of freedom were applied to calculate the total density of states. It was found that both alloys are crystallizing in the bcc structure (space group <span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mi is=\"true\">I</mi><mi is=\"true\">m</mi><mover accent=\"false\" is=\"true\"><mrow is=\"true\"><mn is=\"true\">3</mn></mrow><mo accent=\"true\" is=\"true\">&#xAF;</mo></mover><mi is=\"true\">m</mi></mrow></math>' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.779ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -1094.9 2811.5 1196.3\" width=\"6.53ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\"><use xlink:href=\"#MJMATHI-49\"></use></g><g is=\"true\" transform=\"translate(504,0)\"><use xlink:href=\"#MJMATHI-6D\"></use></g><g is=\"true\" transform=\"translate(1383,0)\"><g is=\"true\" transform=\"translate(24,0)\"><g is=\"true\"><use xlink:href=\"#MJMAIN-33\"></use></g></g><g is=\"true\" transform=\"translate(0,482)\"><use transform=\"scale(0.707)\" x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use><use transform=\"scale(0.707)\" x=\"277\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use></g></g><g is=\"true\" transform=\"translate(1932,0)\"><use xlink:href=\"#MJMATHI-6D\"></use></g></g></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mi is=\"true\">I</mi><mi is=\"true\">m</mi><mover accent=\"false\" is=\"true\"><mrow is=\"true\"><mn is=\"true\">3</mn></mrow><mo accent=\"true\" is=\"true\">¯</mo></mover><mi is=\"true\">m</mi></mrow></math></span></span><script type=\"math/mml\"><math><mrow is=\"true\"><mi is=\"true\">I</mi><mi is=\"true\">m</mi><mover accent=\"false\" is=\"true\"><mrow is=\"true\"><mn is=\"true\">3</mn></mrow><mo accent=\"true\" is=\"true\">¯</mo></mover><mi is=\"true\">m</mi></mrow></math></script></span>, W-type structure) despite the fact that they are formed in 75 and 62.5 at.% from elements crystallizing in hexagonal structure. The presence of minor stoichiometric variations in the samples was detected by EDXS mapping, but its effect on the physical properties seemed negligible. At low temperatures, the alloys become type II superconductors, with a critical temperature in the range of 5.9 – 6.0 K and an upper critical field reaching 13.5 T, a value that is exceptionally high for HEA","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"11 1","pages":""},"PeriodicalIF":8.3000,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Materialia","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.actamat.2024.120666","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Physical and structural properties of two high-entropy alloys (HEA), Ti_0.5(ZrNbHfTa)_0.5 and Ti_0.5(VNbHfTa)_0.5, belonging to the new type of Ti-rich HEA were studied by powder x-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDXS), magnetization, electrical resistivity and specific heat measurements. The experimental results were supported by theoretical calculations of the electronic structure using projector augmented wave (PAW) within the density functional theory. Simulated structure relaxations with several degrees of freedom were applied to calculate the total density of states. It was found that both alloys are crystallizing in the bcc structure (space group

I m \bar{3} m

$I m \bar{3} m$ , W-type structure) despite the fact that they are formed in 75 and 62.5 at.% from elements crystallizing in hexagonal structure. The presence of minor stoichiometric variations in the samples was detected by EDXS mapping, but its effect on the physical properties seemed negligible. At low temperatures, the alloys become type II superconductors, with a critical temperature in the range of 5.9 – 6.0 K and an upper critical field reaching 13.5 T, a value that is exceptionally high for HEA

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Acta Materialia 工程技术-材料科学：综合

CiteScore

16.10

自引率

8.50%

发文量

801

审稿时长

53 days

期刊介绍： Acta Materialia serves as a platform for publishing full-length, original papers and commissioned overviews that contribute to a profound understanding of the correlation between the processing, structure, and properties of inorganic materials. The journal seeks papers with high impact potential or those that significantly propel the field forward. The scope includes the atomic and molecular arrangements, chemical and electronic structures, and microstructure of materials, focusing on their mechanical or functional behavior across all length scales, including nanostructures.