LOCAL SYMMETRY LOWERING IN THE CUBIC INTERMETALLICS YBPDBI AND YBNISB

被引：11

作者：

LEBRAS, G

BONVILLE, P

HODGES, JA

HAMMANN, J

BESNUS, MJ

SCHMERBER, G

DHAR, SK

ALIEV, FG

ANDRE, G

机构：

[1] IPCMS,F-67037 STRASBOURG,FRANCE

[2] TATA INST FUNDAMENTAL RES,BOMBAY 400005,MAHARASHTRA,INDIA

[3] MOSCOW MV LOMONOSOV STATE UNIV,DEPT PHYS,MOSCOW 119899,RUSSIA

[4] CTR ETUD SACLAY,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 28期

关键词：

D O I：

10.1088/0953-8984/7/28/020

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A microscopic investigation of the cubic ternary alloys YbPdBi and YbNiSb, using Yb-170 Mossbauer spectroscopy, reveals that the point symmetry at the site of the Yb3+ ion is far from cubic in both compounds. An analysis of the thermal variation of the quadrupolar 4f moment shows that the energy of the first crystal electric field transition is close to 20 K in YbPdBi and to 10 K in YbNiSb. Specific heat measurements are also presented in YbPdBi, and magnetic ordering is detected below 1 K in YbPdBi, with saturated Yb3+ moments of 1.25 mu(B), and below 0.85 K in YbNiSb, with saturated moments of 1 mu(B). A tentative explanation of the Yb site symmetry breaking is made in terms of a Jahn-Teller distortion within the Gamma(8) cubic quartet.

引用

页码：5665 / 5680

页数：16

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