Diffuse phase transition and phase separation in Cr-doped Nd1/2Ca1/2MnO3:: A relaxor ferromagnet

被引：263
作者：
Kimura, T [1 ]
Tomioka, Y
Kumai, R
Okimoto, Y
Tokura, Y
机构：
[1] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 3050046, Japan
[2] Univ Tokyo, Dept Appl Phys, Tokyo 1130033, Japan
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.83.3940
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated the diffuse phase transition accompanying the formation of submicrometric ferromagnetic-metallic (FM) domains embedded in the antiferromagnetic charge-ordered state in Nd1/2Ca1/2MnO3 crystals, which is caused by quenched random field originating from Cr impurities substituted on the Mn sites. The fraction of the FM phase volume or the size of the PM cluster can be controlled to a large extent by the magnetic-field annealing as well as the Cr content. The observed phenomena are reminiscent of those of relaxor ferroelectrics composed of ferroelectric clusters embedded in paraelectric matrix.
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页码：3940 / 3943
页数：4
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