Title :
Unidirectional magnetic anisotropy in amorphous Tb-Fe films
Author :
Shipil, Elena V. ; Guslienko, Konstantin Yu. ; Szymanski, Bogdan
Author_Institution :
Inst. of Metal Phys., Acad. of Sci., Kiev, Ukraine
fDate :
3/1/1994 12:00:00 AM
Abstract :
The torque curves (TC) of amorphous TbFe films with the thicknesses d=40-80 nm and compositions near room temperature compensation point were experimentally investigated. The films were evaporated by the electron-beam method. Unidirectional (exchange) anisotropy revealed in TC hysteresis is detected and explained by the strong chemical inhomogeneities of the films. The Fe inclusions are the characteristic peculiarity of Tb-Fe films. Their dimensions are determined by the preparation technique. The exchange field on Tb ions is estimated by using the temperature dependence of the TC amplitude as 1.1-1.3·106 Oe
Keywords :
exchange interactions (electron); iron alloys; magnetic anisotropy; magnetic hysteresis; magnetic properties of amorphous substances; magnetic thin films; terbium alloys; vacuum deposited coatings; 40 to 80 nm; Fe inclusions; Tb-Fe; amorphous TbFe films; chemical inhomogeneities; electron-beam evaporation; exchange anisotropy; exchange field; temperature dependence; torque curves; unidirectional magnetic anisotropy; Amorphous materials; Amplitude estimation; Anisotropic magnetoresistance; Chemicals; Iron; Magnetic anisotropy; Magnetic films; Magnetic hysteresis; Temperature; Torque;
Journal_Title :
Magnetics, IEEE Transactions on
