SPIN FLUCTUATIONS IN YMN2 AND RELATED ALLOYS

被引：17

作者：

RAINFORD, BD

DAKIN, S

CYWINSKI, R

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

[2] UNIV READING,JJ THOMSON PHYS LAB,READING RG6 2AF,BERKS,ENGLAND

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1992年 / 104卷 / pt 2期

关键词：

Intermetallics - Magnetic Materials--Electronic Properties - Magnetism - Neutrons--Scattering;

D O I：

10.1016/0304-8853(92)90573-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetism of alloys based on the cubic Laves phase compound YMn2 is dominated by antiferromagnetic spin fluctuations which persist to high temperatures. Inelastic neutron scattering measurements allow the spin fluctuation spectra to be studied in detail. We present measurements on a YMn2-xFex alloy covering a wide range of K, omega with good energy resolution. From analysis of the wavevector dependent susceptibility chi(K) we are able to extract the local susceptibility chi(L) which is found to obey a Curie-Weiss law with THETA = - 153 K and mu(eff) = 3.2-mu(B). The development of the spectra at low temperatures is consistent with an approach to an antiferromagnetic phase transition, and is in qualitatively agreement with recent mu-SR data on this system.

引用

页码：1257 / 1261

页数：5

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