Magnetovolume effect in UGa3

被引：22

作者：

Grechnev, GE

Panfilov, AS

Svechkarev, IV

Delin, A

Johansson, B

Wills, JM

Eriksson, O

机构：

[1] Ukrainian Acad Sci, B Verkin Inst Low Temp Phys & Engn, UA-310164 Kharkov, Ukraine

[2] Univ Uppsala, Dept Phys, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden

[3] Univ Calif Los Alamos Natl Lab, Ctr Mat Sci, Los Alamos, NM 87544 USA

[4] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 192卷 / 01期

关键词：

magnetovolume effect; antiferromagnetic compounds; Neel temperature;

D O I：

10.1016/S0304-8853(98)00372-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic susceptibility chi of the itinerant antiferromagnetic compound UGa3 has been studied experimentally under pressure up to, kbar in the temperature range 64-300 K. This study reveals a pronounced pressure effect on magnetic properties of UGa3 and the measured pressure derivative of the Neel temperature is found to be dT(N)/dP = -1.1 K/kbar. In order to analyze the experimental magnetovolume effect, to be specific d ln chi/d ln V, the volume dependent electronic structure of UGa3 has been calculated ab initio in the paramagnetic phase by employing a relativistic full-potential LMTO method. The effect of the external magnetic field was included self-consistently by means of the Zeeman operator, as well as orbital polarization. The calculations have brought out a predominance of itinerant uranium 5f states at the Fermi energy, as well as large and competing orbital and spin contributions to chi. The calculated field-induced magnetic moment of UGa3 and its volume derivative compare favorably with our experimental results. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：137 / 147

页数：11

共 38 条

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