DocumentCode :
985846
Title :
Time dependent magnetization of a system of fine cobalt particles
Author :
O´Grady, K. ; Chantrell, R.W. ; Popplewell, J. ; Charles, S.W.
Author_Institution :
University College of North Wales, Bangor, Gwynedd, UK.
Volume :
17
Issue :
6
fYear :
1981
fDate :
11/1/1981 12:00:00 AM
Firstpage :
2943
Lastpage :
2945
Abstract :
Measurements are presented which show that the magnetisation of a system of fine cobalt particles at 77°K is time dependent. The system examined in this work is of fine cobalt particles with median diameter Dv = 70 Å dispersed in toluene. The particles have been found to be in the fcc phase. The time decay of magnetisation has been found to be logarithmic. The time dependence coefficient 
varies with the applied field H and is a maximum for H = Hc the coercive force. These observations are in good agreement with the theory presented in this paper.
varies with the applied field H and is a maximum for H = HKeywords :
Powdered magnetic materials/devices; Soft magnetic materials/devices; Anisotropic magnetoresistance; Cobalt; Coercive force; Magnetic anisotropy; Magnetic field measurement; Particle measurements; Perpendicular magnetic anisotropy; Saturation magnetization; Time measurement; Volume relaxation;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1981.1061621
Filename :
1061621
Link To Document :
