Competing electronic ground states in La1-xCaxCoO3 -: art. no. 054401

被引：53

作者：

Burley, JC ^{[1
]}

Mitchell, JF ^{[1
]}

Short, S ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.69.054401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present the results of a neutron powder-diffraction study on La1-xCaxCoO3. We show that, contrary to previous reports, a first-order structural transition R (3) over barc-->Pnma occurs as a function of both x and T. Spin-state transitions occur as a function of x, T as indicated by the changes in cell volume, with evidence of a macroscopically inhomogeneous spin-state mixture at x=0.1. The magnetic behavior generally parallels that of La1-xSrxCoO3, with evidence for both spin-glass behavior and ferromagnetism.

引用

页数：5

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