Enhancement of ferromagnetic cluster induced by magnetic field in the phase-separated La0.5Ca0.5MnO3

被引：0

作者：

Li, RW ^{[1
]}

Sun, JR

Wang, ZH

Chen, X

Zhang, SY

Shen, BG

机构：

[1] Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China

来源：

CHINESE PHYSICS | 2000年 / 9卷 / 08期

关键词：

ferromagnetic cluster; phase separation;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic and transport properties of La0.5Ca0.5MnO3 have been investigated by measuring the magnetization and resistance in zero-field-cooled (ZFC) and held-cooled (FG) modes. Conspicuously irreversible behaviors of magnetization/resistance in the two different modes were observed below the charge ordering transition temperature (T-CO) The ZFG and FC magnetizations at 5K, as functions of the magnetic field, coincide for mu(0)H less than or equal to 1T Afterwards, the ZFC magnetization tends to an approximate constant, but the FC one increases linearly with increasing field. There exists an excellent correspondence between magnetization and resistance below T-CO All the results suggest that the ferromagnetic clusters embed in the charge-ordered matrix. The phenomenon of ferromagnetic clusters growing up easily in the FC procedure has been interpreted according to the model of thermally activated two-level system.

引用

页码：630 / 633

页数：4

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