THERMOMAGNETIC PROPERTIES OF FERROFLUIDS CONTAINING CHEMICALLY COPRECIPITATED MN-ZN FERRITE PARTICLES

被引：8

作者：

BLUMS, E

MAIOROV, MM

KRONKALNS, G

机构：

[1] Institute of Physics, Latvian Academy of Sciences, Salaspils-1

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1993年 / 29卷 / 06期

关键词：

D O I：

10.1109/20.281158

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 ; 0809 ;

摘要：

Magnetic properties of ferrofluids containing polydisperse chemically coprecipitated Mn-Zn ferrite nanparticles of various composition as well as the dispersion characteristics and structure of particles are investigated. Results of the neutron- activation analysis of particles give Mn, Zn and Fe ratio different from that of stoichiometrically predicted ones at precipitation. Magnetogranulometric analysis of ferrofluid samples performed by using the Langevin-type magnetization model of non-interacting subdomain particles show that instead of the usually observed log-normal particle size distribution curves there exist a more complex distribution of magnetic moments of particles. Ultracentrifugal separation of samples allow to distribute two fractions of particles having different magnetic moment values which are not proportional to the particle mean volumes determined using X-ray diffraction spectra measurements.

引用

页码：3267 / 3269

页数：3

共 11 条

[1] ON THE PREPARATION OF THE COLORED WATER-BASED MAGNETIC FLUIDS (RED, YELLOW, BLUE AND BLACK) [J].