Magnetic property of oxide passivated Co nanosized particles dispersed in two dimensional plane

被引：4

作者：

Sako, S ^{[1
]}

Ohshima, K

Sakai, M

机构：

[1] Mie Univ, Fac Educ, Dept Phys, Tsu, Mie 5140008, Japan

[2] Matsumoto Dent Univ, Dept Phys, Shiojiri 3990781, Japan

[3] Inst Mol Sci, Res Ctr Mol Mat, Okazaki, Aichi 4448585, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2001年 / 70卷 / 07期

关键词：

Neel temperature; nanosized particle; Co particle; spin-glass; dipole interaction; superparamagnetism;

D O I：

10.1143/JPSJ.70.2134

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The particle size dependence of Neel temperature was investigated in a thin CoO shell of an oxide passivated Co particle. In addition to the blocking effect of the exchange anisotropy interaction, the influence of the magnetic dipole interaction between neighbouring Co cores to the blocking temperature TB was examined by measuring the zero field cooling magnetic susceptibility in dense oxide passivated nanosized Co particles dispersed uniformly on two dimensional plane without coagulation. The blocking temperature dominated by the dipole-dipole interaction was discussed in relation to the transition temperature to the spin-glass like collective state.

引用

页码：2134 / 2138

页数：5

共 30 条

[1] ORIENTATIONAL ORDERING IN SPATIALLY DISORDERED DIPOLAR SYSTEMS [J].