Time dependent effects and transport evidence for phase separation in La0.5Ca0.5MnO3

被引：28

作者：

Roy, M ^{[1
]}

Mitchell, JF

Schiffer, P

机构：

[1] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 87卷 / 09期

关键词：

D O I：

10.1063/1.372537

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ground state of La1-xCaxMnO3 changes from a ferromagnetic metallic to an antiferromagnetic charge-ordered state as a function of Ca concentration at x similar to 0.50. We present evidence from transport measurements on a sample with x=0.50 that the two phases can coexist, in agreement with other observations of phase separation in these materials. We also observe that, by applying and then removing a magnetic field to the mainly charge-ordered state at some temperatures, we can "magnetically anneal" the charge order, resulting in a higher zero-field resistivity. We also observe logarithmic time dependence in both resistivity and magnetization after a field sweep at low temperatures. (C) 2000 American Institute of Physics. [S0021- 8979(00)42808-2].

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页码：5831 / 5833

页数：3

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