Unconventional relaxation in antiferromagnetic CoRh2O4 nanoparticles

被引：7

作者：

Bhowmik, R. N. ^{[1
]}

Ranganathan, R. ^{[1
]}

机构：

[1] Saha Inst Nucl Phys, Expt Condenxed Matter Phys Div, Kolkata 700064, W Bengal, India

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.75.012410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic relaxation in antiferromagnetic CoRh2O4 nanoparticles is investigated at 2 K by cooling the sample from a temperature (70 K) well above the antiferromagnetic ordering temperature at 27 K, following zero-field-cooled (ZFC) and field-cooled (FC) process. In the ZFC process, the sample at 2 K is subsequently followed by magnetic-field ON and OFF sequences, whereas in the FC process the cooling field is made off during measurement of the remanent magnetization as a function of time. The experiments suggest an unconventional relaxation behavior in the system as an effect of competition between surface exchange anisotropy and antiferromagnetic interactions in antiferromagnetic nanoparticles.

引用

页数：4

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