INHIBITION OF DOMAIN-WALL FORMATION AND ITS EFFECTS ON THE BULK MAGNETIC-PROPERTIES OF CERTAIN SPINELS

被引：27

作者：

RADHAKRISHNAMURTY, C

NANADIKAR, NG

机构：

[1] Tata Institute of Fundamental Research, Bombay

来源：

PRAMANA | 1979年 / 13卷 / 04期

关键词：

domain walls; Multidomain; single-domain; spin glass; superparamagnetism; titanomagnetite;

D O I：

10.1007/BF02846138

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It is shown that hysteresis and susceptibility studies at various temperatures could provide an idea whether a magnetic sample contains multidomain, single-domain or superparamagnetic particles. Our results on titanomagnetites with those of others on cobalt substituted magnesium ferrites suggest that domain wall formation is inhibited in some of them whereby only single-domain or superparamagnetic particles occur irrespective of the physical grain size of such materials. At high concentration of titanium in titanomagnetites, the magnetic behaviour is similar to a spin glass, which we interpret as a transition of optimum single-domains going over to superparamagnetic state. © 1977 the Indian Academy of Sciences.

引用

页码：413 / 422

页数：10

共 29 条

[1]

AKIMOTO S, 1962, J PHYS SOC JPN, V17, P706

[2] SIZE DEPENDENCE OF THE WALL CHARACTERISTICS IN A 2-DOMAIN IRON PARTICLE [J].