DIPOLE INTERACTIONS WITH RANDOM ANISOTROPY IN A FROZEN FERROFLUID

被引:434
作者
LUO, WL
NAGEL, SR
ROSENBAUM, TF
ROSENSWEIG, RE
机构
[1] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637
[2] EXXON RES & ENGN CO,CORP RES SCI LABS,ANNANDALE,NJ 08801
关键词
D O I
10.1103/PhysRevLett.67.2721
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Glassy behavior (including hysteresis, irreversibility, a peak in the zero-field-cooled magnetization, and nonexponential relaxation) is observed in a quenched ferrofluid system consisting of 50-angstrom magnetite particles. An Arrott plot, M2 vs H/M, shows clear features of random anisotropy similar to what is found in amorphous ferromagnets. We discuss the glassy behavior in terms of both the random anisotropy and the dipole interactions, and we contrast the unusual response of our system with canonical spin glasses.
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页码:2721 / 2724
页数:4
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