Magnetic properties of LaNi1-xMnxO3+δ perovskites

被引：35

作者：

Blasco, J ^{[1
]}

García, J

Sánchez, MC

Campo, J

Subías, G

Pérez-Cacho, J

机构：

[1] CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[2] CSIC, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, E-50009 Zaragoza, Spain

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[5] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

EUROPEAN PHYSICAL JOURNAL B | 2002年 / 30卷 / 04期

关键词：

D O I：

10.1140/epjb/e2002-00403-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic measurements have been carried out in different LaNi1-xMnxO3+delta samples with 0.1 less than or equal to x less than or equal to 0.9. All these samples show two magnetic anomalies, one at relatively high temperature characteristic of a ferromagnetic ordering and the other at low temperature, typical of magnetic relaxation phenomena. Neutron diffraction patterns indicate that long-range ferromagnetic ordering is only achieved for x greater than or equal to 0.5. Neutron patterns of LaNi0.5Mn0.5O3+delta samples show an ordered arrangement of Ni and Mn atoms in the perovskite lattice. LaNi0.5Mn0.5O3+delta is then, a double perovskite A(2)BB'O-6 whereas Ni and Mn atoms are randomly distributed for the rest of the samples. X-ray magnetic circular dichroism experiments confirm the presence of collinear ferromagnetism in LaNi0.5Mn0.5O3+delta. The role of competitive magnetic interactions, structural disorder, magnetic anisotropy and magnetic disaccommodation is also discussed.

引用

页码：469 / 479

页数：11

共 46 条

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