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Enhancing Magnetic Functionality with Scandium: Breaking Stereotypes in the Design of Rare Earth Materials

TitleEnhancing Magnetic Functionality with Scandium: Breaking Stereotypes in the Design of Rare Earth Materials
Publication TypeJournal Article
Year of Publication2017
AuthorsMudryk, Y, Paudyal, D, Liu, J, Pecharsky, VK
JournalChemistry of Materials
Volume29
Pagination3962-3970
Date Published05
Type of ArticleArticle
ISBN Number0897-4756
Accession NumberWOS:000401221700017
Keywordschemistry, gd-5(si2ge2), magnetocaloric materials, Materials Science, refrigeration, systems, transition
Abstract

and hysteresis, and drastically improve reversibility of the first-order magnetostructural transformation at Tc. In agreement with first-principles predictions, higher than 20% Sc leads to the formation of a closely related Pu5Rh4-type structure where the first-order magnetostructural transformation is replaced by a conventional second-order ferromagnetic ordering that remains accompanied by a continuous rearrangement of the crystal lattice. Comparison of two materials with similar structures and compositions shows that significantly stronger magnetocaloric effect occurs in the first-order material, which also shows very small hysteresis. Furthermore, we demonstrate that a behavior of a specific interatomic distance can predict anomalous physical properties in a series of alloys where compositional dependence of lattice parameters suggests a rather trivial solid solubility and uninteresting magnetism.

DOI10.1021/acs.chemmater.7b00314
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Alternate JournalChem. Mat.