Low temperature properties of some RIn3 compounds

TitleLow temperature properties of some RIn3 compounds
Publication TypeJournal Article
Year of Publication2009
AuthorsHale L, Gschneidner KA, Pecharsky VK, Mudryk Y
Journal TitleJournal of Alloys and Compounds
Date Published03/20
ISBN Number0925-8388
Accession NumberISI:000264757200012
Keywordsheat capacity, indium, magnetically ordered intermetallics, rare earth compounds, x-ray diffraction

The low temperature heat capacity of ErIn3 has been studied because of its potential as a regenerator material. Slight variations from stoichiometry and plastic deformation have been shown to affect the heat capacity of ErIn3. The (HoxEr1-x)In-3 system has been studied in detail revealing that the lattice parameter varies linearly as a function of x, while the Neel temperatures vary with a slight departure from linearity. An analysis of the concentration dependence of the Neel temperature in the (HoxEr1-x)In-3 system indicates that when the rare earth metal size is within 5.65% of the indium radius, a narrow solid solution region forms on the indium-rich side of the RIn3 phase. A high-resolution X-ray powder diffraction study does not reveal a structural distortion in ErIn3, or (Ho0.25In0.75)In-3, or HoIn3. Rare earth substitutions (R = Y, Ce, Pr, and Dy) for the Er in (RxEr1-x)In-3 shift the Neel temperature and may have a significant effect on the heat capacity, depending on the rare earth metal. (C) 2008 Elsevier B.V. All rights reserved

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