Spin-state transition in layered perovskite cobalt oxides: La2-xSrxCoO4 (0.4<=x<=1.0)

被引：149

作者：

Moritomo, Y ^{[1
]}

Higashi, K ^{[1
]}

Matsuda, K ^{[1
]}

Nakamura, A ^{[1
]}

机构：

[1] NAGOYA UNIV, DEPT APPL PHYS, NAGOYA, AICHI 46401, JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.55.R14725

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic and transport properties are investigated for single crystals of layered perovskite cobalt oxides, La2-xSrxCoO4 (0.4 less than or equal to x less than or equal to 1.0). The effective magnetic moment mu(eff) is found to decrease with increasing x (or increasing the number of Co3+ ions) from approximate to 4.0 mu(B) for x=0.4-0.5 to approximate to 2.6 mu(B) for x=0.8-1.0, accompanied by a steep reduction of the resistivity rho(ab) and Wiess temperature circle dot. These drastic changes of the magnetic and electronic properties suggest a spin-state transition of the Co3+ ions from the high-spin to the intermediate-spin state.

引用

页码：14725 / 14728

页数：4

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