INITIAL SUSCEPTIBILITIES OF MAGNETIC FLUIDS DISPERSING MN-ZN FERRITE AND COBALT FERRITE PARTICLES

被引：13

作者：

NAKATSUKA, K

JEYADEVAN, B

机构：

[1] Dept. of Resources Engineering, Tohoku University, Faculty of Engineering

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1994年 / 30卷 / 06期

关键词：

D O I：

10.1109/20.334185

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

The magnetic and hydrodynamic properties of magnetic fluid depend on the micro behavior of the particles in the media. In this paper, we discuss the relaxation mechanism of Mn-Zn and cobalt: ferrite particles in kerosene based magnetic fluid by measuring the initial susceptibilities in the temperature range of 83-293K. The Mn-Zn ferrite magnetic fluid was found to consist almost only of superparamagnetic(SP) particles, where as the cobalt ferrite magnetic fluid consists mostly of non-SP particles that relax through Brownian rotation for fields less than 440 Oe and influence the magnetic and hydrodynamic properties of the fluid.

引用

页码：4671 / 4673

页数：3

共 10 条

[1]

Debye P., 1929, POLAR MOL

[2]

THE ORDERING TEMPERATURE IN FINE PARTICLE-SYSTEMS [J].