Magnetic order in the lamellar compounds La1-xSr1+xCoO4 (0≤x≤0.4)

被引:13
|
作者
Sánchez-Andújar, M
Rivas-Murias, B
Rinaldi, D
Caciuffo, R
Mira, J
Rivas, J
Señarís-Rodríguez, MA
机构
[1] Univ A Coruna, Dept Quim Fundamental, La Coruna 15071, Spain
[2] Univ Santiago de Compostela, Dept Fis Aplicada, Santiago De Compostela 15782, Spain
[3] Univ Politecn Marche, INFM, I-60131 Ancona, Italy
[4] Univ Politecn Marche, Dept Fis & Ingn Mat, I-60131 Ancona, Italy
关键词
layered-Perovskites; cobalt oxides; Ruddlesden-popper compounds; magnetic properties;
D O I
10.1016/j.jmmm.2003.11.357
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have studied the AC and DC magnetic properties of the lamellar compounds La1-xSr1+xCoO4 (0 less than or equal to x less than or equal to 0.4). These materials are found to evolve towards an anomalous "cluster-glass"-like behaviour as x increases. The onset of the ferromagnetic order in the bidimensional phases is seen to occur at around 150 K, followed by a blocking process around 125 K. Also, present in the magnetic behaviour of these materials is the signal coming from small intergrowths of a perovskite phase, also detected by TEM, although invisible for powder-X-ray diffraction. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:855 / 856
页数:2
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