S-NOT-EQUAL-1 IMPURITY EFFECT ON PHASE-TRANSITION IN LIVO2

被引：8

作者：

NAKA, T ^{[1
]}

ONODA, M ^{[1
]}

NAGASAWA, H ^{[1
]}

机构：

[1] UNIV TSUKUBA,INST PHYS,TSUKUBA,IBARAKI 305,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1993年 / 87卷 / 08期

关键词：

Crystal impurities - Crystal lattices - Diffraction - Ions - Magnetic variables measurement - Nuclear magnetic resonance - Phase transitions - Substitution reactions;

D O I：

10.1016/0038-1098(93)90205-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Structural and magnetic transitions in the triangular lattice compound LiVO2 have been studied through X-ray diffraction and magnetic measurements of the partially substituted systems of Li1-xMgxVO2 and LiV1-xAlxO2. The transition temperature T(c1,2) decreases with x in both systems. A small but systematic increase of the Curie constant below T(c1,2) with the substitution of V3+ by V2+ in the Li1-xMgxVO2 system at temperatures well below T(c1,2) has been interpreted as the contribution from the triangular cluster with S=1/2 separated by the singlet clusters. It has also been indicated that T(c1,2) and the exchange coupling constant of V3+ ions are strongly correlated with V-V distance and displacement of V ions.

引用

页码：679 / 683

页数：5

共 4 条

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