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Type: Artigo de periódico
Title: Magnetic And Magnetocaloric Properties On The U1-y Ry Ga2 (r=er And Dy) Compound
Author: Da Silva L.M.
Dos Santos A.O.
Gandra F.G.
Cardoso L.P.
Gama S.
Abstract: The magnetic, calorimetric, and magnetocaloric properties of the pseudobinary U1-y Ry Ga2 (R=Er and Dy) series were studied to determine its potential as a candidate for use in cryogenic magnetic refrigeration. The partial substitution of Dy and Er for U provides a wide range of the ordering temperature and increases the saturation magnetic moment. The results for U1-y Dyy Ga2 with 0.6<y<0.9 show evidences of a spin-glass-like (SG) behavior, possibly as a consequence of competing anisotropy and exchange interactions within a frustrated hexagonal spin lattice. The isothermal magnetic entropy change (Δ Smag) observed for U Ga2 shows a well defined peak centered on TC, which is gradually broadened and shifted to lower temperatures as the Er and Dy content increases. For low concentrations (0.2≤y≤0.4) a tablelike profile is observed in the Δ Smag curve. © 2008 American Institute of Physics.
Citation: Journal Of Applied Physics. , v. 103, n. 7, p. - , 2008.
Rights: aberto
Identifier DOI: 10.1063/1.2830689
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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