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Modeling pseudo-elasticity in small-scale ThCr2Si2-type crystals

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dc.contributor.authorBakst, Ian N.
dc.contributor.authorWeinberger, Christopher R.
dc.contributor.authorLee, Seok-Woo
dc.contributor.authorSypek, John T.
dc.contributor.authorNeilson, James R.
dc.date.accessioned2018-03-05T19:02:14Z
dc.date.available2018-03-05T19:02:14Z
dc.date.issued2018
dc.descriptionThese data files contain the raw DFT data of the compression of CaFe2As2 and LaRu2P2 unit cells used for the construction of the composite model. The output of the model is also included in this data set.
dc.description.abstractCrystals of the ThCr2Si2-type structure comprise a large class of known compounds, and observations of superconductivity in some of the compounds generated significant interest in these materials. Recently, nano-indentation experiments have shown that at room temperature, small-scale crystals of CaFe2As2 exhibit pseudo-elastic behavior with recoverable strains of over 10%. These experiments also demonstrate the potential for shape memory effects at cryogenic temperatures, behavior which has previously been related to its magnetic phase transitions. In this work, the phase transitions of CaFe2As2 are investigated using density functional theory (DFT) in conjunction with analytical models. The models demonstrate that both uniaxial and hydrostatic loading can give rise to pseudo-elastic behavior. These models are then applied to LaRu2P2, which does not exhibit a magnetic phase change, but is still found to have a similar pseudo-elastic response. A suite of parameters useful in quantifying the complex responses of these compounds is presented and it is demonstrated that c-axis strain is the critical loading parameter in predicting the pseudo-elastic behavior. These results provide a method of connecting local chemical tuning to macroscopic behavior.en_US
dc.format.mediumZIP
dc.format.mediumCSV
dc.format.mediumTXT
dc.identifier.urihttps://hdl.handle.net/10217/186349
dc.identifier.urihttp://dx.doi.org/10.25675/10217/186349
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartofResearch Data
dc.subjectpseudo-elasticen_US
dc.subjectsuperelasticen_US
dc.subjectphase-changeen_US
dc.subjectLaRu2P2en_US
dc.subjectCaFe2As2en_US
dc.subject122-type superconductorsen_US
dc.subjectDFTen_US
dc.titleModeling pseudo-elasticity in small-scale ThCr2Si2-type crystalsen_US
dc.typeDataset

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