Diffuse phase transition and phase separation in Cr-doped Nd1/2Ca1/2MnO3:: A relaxor ferromagnet
Diffuse phase transition and phase separation in Cr-doped Nd1/2Ca1/2MnO3:: A relaxor ferromagnet
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DOI：
10.1103/physrevlett.83.3940
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发表时间：
1999-11-08
影响因子：
8.6
通讯作者：
Tokura, Y
中科院分区：
文献类型：
--
作者：
Kimura, T;Tomioka, Y;Tokura, Y
我们已经研究了伴随于抗铁磁性电荷的状态嵌入ND1/2CA1/2MNO3晶体中的抗铁磁性电荷态状态中的量子微电磁 - 金属金属（FM）结构域的弥漫相跃迁，该结构均由cr含量的随机场引起的，该晶体是由含有的cr含量引起的。站点。 FM相体积的分数或PM簇的大小可以通过磁场退火以及CR含量在很大程度上控制。观察到的现象让人想起那些由嵌入在副矩阵中的铁电簇组成的弛豫铁电电。
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.