Superelasticity and cryogenic linear shape memory effects of CaFe2As2 Goldman, Alan Sypek, John Yu, Hang Dusoe, Keith Canfield, Paul Drachuck, Gil Patel, Hetal Giroux, Amanda Goldman, Alan Kreyssig, Andreas Canfield, Paul Bud’ko, Serguei Weinberger, Christopher Lee, Seok-Woo
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy 2018-02-19T03:50:35.000 2020-06-29T23:22:10Z 2020-06-29T23:22:10Z 2017-11-21 2017-10-20
dc.description.abstract <p>Shape memory materials have the ability to recover their original shape after a significant amount of deformation when they are subjected to certain stimuli, for instance, heat or magnetic fields. However, their performance is often limited by the energetics and geometry of the martensitic-austenitic phase transformation. Here, we report a unique shape memory behavior in CaFe2As2, which exhibits superelasticity with over 13% recoverable strain, over 3 GPa yield strength, repeatable stress–strain response even at the micrometer scale, and cryogenic linear shape memory effects near 50 K. These properties are acheived through a reversible uni-axial phase transformation mechanism, the tetragonal/orthorhombic-to-collapsed-tetragonal phase transformation. Our results offer the possibility of developing cryogenic linear actuation technologies with a high precision and high actuation power per unit volume for deep space exploration, and more broadly, suggest a mechanistic path to a class of shape memory materials, ThCr2Si2-structured intermetallic compounds.</p>
dc.identifier archive/
dc.identifier.articleid 1032
dc.identifier.contextkey 11103075
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/31
dc.language.iso en
dc.relation.ispartofseries IS-J 9415
dc.source.bitstream archive/|||Fri Jan 14 23:30:53 UTC 2022
dc.source.uri 10.1038/s41467-017-01275-z
dc.subject.disciplines Condensed Matter Physics
dc.subject.disciplines Engineering Physics
dc.subject.disciplines Materials Science and Engineering
dc.title Superelasticity and cryogenic linear shape memory effects of CaFe2As2
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication c31f41cd-56c9-4b72-a034-c13cd4ec4d43
relation.isAuthorOfPublication c5a8128b-7d98-4b8f-92d7-b1385e345713
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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