Enhanced magnetic entropy in GdNi2

被引：11
作者：
Baranov, N. V. [1 ]
Proshkin, A. V.
Gerasimov, E. G.
Podlesnyak, A.
Mesot, J.
机构：
[1] RAS, Inst Met Phys, Ekaterinburg 620219, Russia
[2] Ural State Univ, Inst Phys & Appl Math, Ekaterinburg 620083, Russia
[3] Swiss Fed Inst Technol, Lab Neutron Scattering, CH-5232 Villigen, Switzerland
[4] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[5] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany
来源：
PHYSICAL REVIEW B | 2007年 / 75卷 / 09期
关键词：
D O I：
10.1103/PhysRevB.75.092402
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Measurements of the specific heat have been performed on Gd1-xYxNi2 (x=0,0.2) compounds and their nonmagnetic analogs Lu1-yYyNi2, which have similar molar masses. It is found that the difference between the entropies of magnetic and nonmagnetic compounds with identical molar masses surpasses substantially (by 14-19%) the theoretical limit for the magnetic contribution S-m=(1-x)R ln(8) calculated assuming that only Gd ions possess a magnetic moment. This observed enhancement of the magnetic entropy in Gd1-xYxNi2 is believed to result from spin fluctuations induced by f-d exchange in the 3d electron subsystem of Ni.
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页数：4
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