MAGNETIC-BEHAVIOR OF GAMMA-PHASE HYDRIDES RCO3H-SIMILAR-TO-4 IN HIGH MAGNETIC-FIELDS

被引：11

作者：

BARTASHEVICH, MI ^{[1
]}

GOTO, T ^{[1
]}

YAMAGUCHI, M ^{[1
]}

YAMAMOTO, I ^{[1
]}

SUGAYA, F ^{[1
]}

机构：

[1] YOKOHAMA NATL UNIV,FAC ENGN,YOKOHAMA,JAPAN

来源：

PHYSICA B | 1993年 / 190卷 / 04期

关键词：

D O I：

10.1016/0921-4526(93)90191-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

High-field magnetization measurements have been carried out for single-crystal gamma-phase hydrides RCo3H(approximately 4) with R = Th and Dy and for powder samples with R = Nd and Gd. The results indicate that these gamma-phase hydrides with R = Y, Ho and Er become antiferromagnetic except for R = Gd at low temperatures due to the appearance of a negative Co-Co intersublattice interaction. A metamagnetic transition of the Co-sublattice magnetization occurs from the antiferromagnetic to the forced ferromagnetic state if the field is applied along the c-axis. GdCo3H(approximately 4), being ferrimagnetic at low temperatures, becomes antiferromagnetic above 32 K. The significant weakening of the R-Co interaction due to hydrogenation leads to a Neel temperature of about 200 K in all hydrides and an almost independent behaviour of the R and Co sublattices in the compounds with R = Nd, Ho and Er. The role of the R-Co interaction in the magnetic behaviour of the hydrides is discussed.

引用

页码：315 / 326

页数：12

共 19 条

[1] THERMAL-EXPANSION AND HIGH-FIELD MAGNETIZATION OF A SINGLE-CRYSTAL GAMMA-PHASE HYDRIDE YCO3H3.9 [J].