Surface ferromagnetism of LaCoO3 crystals
Surface ferromagnetism of LaCoO3 crystals
复制标题
LaCoO3晶体的表面铁磁性
DOI：
10.1016/j.jmmm.2006.11.117
复制
发表时间：
2007
影响因子：
2.7
通讯作者：
M. Itoh
中科院分区：
文献类型：
--
作者：
A. Harada;T. Taniyama;M. Itoh
测定了LaCoO3颗粒样品的线性和非线性磁化率，揭示了LaCoO3的表面铁磁性。由非线性磁化率估计的铁磁转变温度tc1与由Kouvel-Fisher的线性磁化率分析推断的结果一致，而由同一分析同时推断的临界指数γ与二维和三维铁磁的任何报告值都不相容。从表面和/或尺寸效应的角度详细讨论了结果。
Linear and nonlinear magnetic susceptibilities of a LaCoO3particle sample were measured to shed light on the surface ferromagnetism of LaCoO3. The ferromagnetic transition temperature TCestimated from the nonlinear magnetic susceptibility agrees well with that inferred from Kouvel–Fisher's analysis of the linear susceptibility, while the critical exponent γ deduced simultaneously from the same analysis is incompatible with any values reported for 2d and 3d ferromagnetism. The results are discussed in view of surface and/or size effects in detail.