DocumentCode :
1050610
Title :
Accommodation of the permeability due to Co2+ions in cobalt doped iron-ferrites
Author :
Marais, Andre ; Merceron, Therese ; Porte, Maurice
Author_Institution :
Laboratoire de Magnetisme, C.N.R.S., Bellevue, France
Volume :
8
Issue :
3
fYear :
1972
fDate :
9/1/1972 12:00:00 AM
Firstpage :
685
Lastpage :
686
Abstract :
The magnetic aftereffect and induced uniaxial anisotropy Ku have been studied between 50° and 300°C in the Cox Fe3-x O4+γ system with 
0.0150. A peak of disaccommodation (DA) found between 110° and 140°C is followed at higher temperature by a new phenomenon called "accommodation of the permeability" (A) that gives, according to the composition, a negative minimum on the DA curve located between 200° and 230°C. The amplitude of the minimum increases with x. The maximum amplitudes 
on the curves Ku =f (θ) are proportional to x. The two effects A and DA are due to the presence of Co2+ions. A hypothesis is proposed to explain the A phenomenon.
0.0150. A peak of disaccommodation (DA) found between 110° and 140°C is followed at higher temperature by a new phenomenon called "accommodation of the permeability" (A) that gives, according to the composition, a negative minimum on the DA curve located between 200° and 230°C. The amplitude of the minimum increases with x. The maximum amplitudes on the curves Ku =f (θ) are proportional to x. The two effects A and DA are due to the presence of Co2+ions. A hypothesis is proposed to explain the A phenomenon.Keywords :
Cobalt ferrites; Magnetic thermal effects; Anisotropic magnetoresistance; Cobalt; Demagnetization; Ferrites; Magnetic anisotropy; Nickel; Permeability; Perpendicular magnetic anisotropy; Temperature; Toroidal magnetic fields;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1972.1067445
Filename :
1067445
Link To Document :
