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.

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页码：91 / 95

页数：5

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