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
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