Effect of yttrium substitution in charge ordered antiferromagnetic La0.5Ca0.5MnO3

被引：16
|
作者：
Babu, PD
Das, A [1 ]
Paranjpe, SK
机构：
[1] Bhabha Atom Res Ctr, Div Solid State Phys, Trombay 400085, Mumbai, India
[2] Bhabha Atom Res Ctr, Mumbai Ctr, Inter Univ Consortium DAE Facil, Trombay 400085, Mumbai, India
来源：
SOLID STATE COMMUNICATIONS | 2001年 / 118卷 / 02期
关键词：
magnetically ordered materials; crystal structure and symmetry; neutron scattering;
D O I：
10.1016/S0038-1098(01)00039-4
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Neutron diffraction and ac susceptibility measurements on La0.5-xYxCa0.5MnO3 compounds with x = 0 and 0.1 have been carried out to understand the magnetic behaviour arising due to lowering of the A-site ionic radii. We find that the CE-type antiferromagnetic order observed at low temperatures for x = 0 totally disappears and instead ferromagnetic order (T-C similar to 100 K) sets in for x = 0.1. The average bond distance increases while bond angle decreases on substitution of Y. The observed ferromagnetic behaviour is consistent with that predicted for a system with an average A-site cation radius [r(A)] of 1.183 Angstrom based on the temperature versus [r(A)] phase diagram. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：91 / 95
页数：5
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