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.

引用

页数：4

共 26 条

[1] Magnetic phase transitions, short-range correlations and spin fluctuations in (Gd1-xYx)3Co [J].