ORIGIN OF THE SPIN-CANTING ANOMALY IN SMALL FERRIMAGNETIC PARTICLES

被引：162

作者：

PANKHURST, QA ^{[1
]}

POLLARD, RJ ^{[1
]}

机构：

[1] MONASH UNIV,DEPT PHYS,CLAYTON,VIC 3168,AUSTRALIA

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.67.248

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spin-canting anomaly, in which fine ferrimagnetic iron-oxide particles are not completely saturated by large magnetic fields, is usually attributed to noncollinear surface moments. Using a simple mean-field model we show that the anomaly is in fact a routine manifestation of the response of a uniaxial ferrimagnetic powder to an applied field. This view is supported by the modeling of Fe-57 Mossbauer spectra of Co-adsorbed gamma-Fe2O3 recorded at 4.2 K in applied fields of 6.0 and 7.6 T.

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页码：248 / 250

页数：3

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