The magnetic properties of the hole-doped cobaltites R0.5A0.5CoO3 (R = La, rare earth and A = Ca, Sr, Ba)

被引：39

作者：

Ganguly, R ^{[1
]}

Maignan, A ^{[1
]}

Martin, C ^{[1
]}

Hervieu, M ^{[1
]}

Raveau, B ^{[1
]}

机构：

[1] Inst Sci Mat & Rayonnement, Lab CRISMAT, F-14050 Caen, France

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 36期

关键词：

D O I：

10.1088/0953-8984/14/36/315

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The ac and dc magnetic properties of hole-doped cobaltites with compositions La(0.5)Sr(0.5-x)A(x)CoO(3) (A = Ca, Ba) and La0.5-xRxSr0.5CoO3 (R = Nd, Eu) have been studied. The suppression of the cluster glass behaviour of they substitutions for either the lanthanum parent compound, La0.5Sr0.5CoO3, by or the strontium ions is accompanied by an increase in coercive field (H-C) and thermomagnetic irreversibility. The results suggest that the large thermomagnetic irreversibility and coercive fields observed in the hole-doped perovskite cobaltites, arising due to the anisotropic nature of their ferromagnetic character, cannot be correlated with the cluster glass freezing observed in them.

引用

页码：8595 / 8604

页数：10

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