Magnetic domain behavior of Cu-Co spinel ferrite system

Author

Patil, S.I. ; Dabhade, Raka V.

Author_Institution

Dept. of Phys., Poona Univ., Pune, India

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4915

Lastpage

4917

Abstract

Ferrimagnetic oxides may contain single domain or multidomain particles and they convert into superparamagnetic state near the Curie temperature. To explore the existence of these particles Cu-Co mixed spinel ferrites were prepared by standard ceramic technique. The structural aspects of samples were characterised by X-ray diffraction and magnetic measurement. All the studied compounds were crystalline and single phase. The hysteresis parameters were found by vibrating sample magnetometer. The low field a.c. susceptibility measurements were carried out from 300 K to Curie temperature, and the normalized susceptibility was plotted as a function of temperature. The variation in susceptibility was attributed to the transition from single or multidomain to superparamagnetic particle state. The observed results are explained on the basis of magnetic particles, grain size and magnetic anisotropy of the system

Keywords

X-ray diffraction; cobalt compounds; copper compounds; ferrites; grain size; magnetic anisotropy; magnetic domains; magnetic hysteresis; magnetic particles; magnetic susceptibility; superparamagnetism; CuCoFe₂O₄; X-ray diffraction; grain size; hysteresis parameters; magnetic anisotropy; magnetic particles; mixed spinel ferrites; multidomain particles; single domain particles; superparamagnetic state; susceptibility; Ceramics; Crystallization; Ferrimagnetic materials; Ferrites; Magnetic domains; Magnetic hysteresis; Magnetic variables measurement; Magnetometers; Temperature; X-ray diffraction;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334264

Filename

334264