Title :
Magnetic anisotropy and other studies in amorphous Tb-Fe films
Author :
Krishnan, Ram ; Porte, M. ; Tessier, M. ; Vitton, J.P. ; Cars, Y.
Author_Institution :
CNRS, Meudon, France
fDate :
3/1/1988 12:00:00 AM
Abstract :
Magnetic properties of RF sputtered TbxFe1-x films with 132O3 about 15 nm thick. B-H and Kerr loops were studied. Torque measurements were made in the temperature range 20-300 K with a maximum applied field of 12.5 kOe. The experimental data as regards M, Hc, Theta k and Ku are in general agreement with published data. Perfect rectangular loops were obtained for 2026Fe74, Ku increased rapidly as T was lowered and below 80 K, measurements were no longer possible due to the lack of magnetic saturation. For Tb20Fe80, with a Tcomp approximately=150 K, torque curves show anomaly in the neighborhood of Tcomp. The result are discussed leading to the conclusion that stress effects have a dominant role to modify Ku, particularly at low T. The Tb moment at 4 K is calculated to be 7.3+or-0.6 mu B.
Keywords :
Kerr magneto-optical effect; iron alloys; magnetic anisotropy; magnetic properties of amorphous substances; magnetic thin films; magnetisation; sputtered coatings; terbium alloys; 20 to 300 K; B-H loops; Kerr loops; TbxFe1-x-Al2O3; amorphous films; magnetic anisotropy; rotational hysteresis; sputtered films; stress effects; torque curves; Amorphous materials; Iron; Magnetic anisotropy; Magnetic films; Magnetic hysteresis; Magnetic properties; Protection; Radio frequency; Temperature distribution; Torque measurement;
Journal_Title :
Magnetics, IEEE Transactions on