Title :
Magnetic coupling in Fe60Sm40-Fe95Ta5N multilayers
Author :
Butera, A. ; Weston, J.L. ; Barnard, J.A.
fDate :
9/1/2002 12:00:00 AM
Abstract :
Three sets of exchange spring magnetic films and multilayers with different characteristics and well-defined uniaxial anisotropy have been studied by magnetization and ferromagnetic resonance (FMR) techniques. It was found that the exchange spring behavior is strongly influenced by the thickness of the individual layers. In FMR measurements, two or more modes can be observed. These modes are related only to the soft phase and the different resonance fields arise from the different anisotropy of the soft layers. It was also observed that the effective demagnetization field is larger in multilayers than in single films, suggesting the presence of an additional easy plane anisotropy.
Keywords :
coercive force; demagnetisation; exchange interactions (electron); ferromagnetic materials; ferromagnetic resonance; iron alloys; magnetic hysteresis; magnetic multilayers; magnetostriction; perpendicular magnetic anisotropy; samarium alloys; soft magnetic materials; sputtered coatings; tantalum alloys; Fe60Sm40-Fe95Ta5N; coercivity; easy plane anisotropy; effective demagnetization field; exchange spring magnetic films; ferromagnetic resonance; giant magnetostrictive material; hard/soft multilayer films; hysteresis loops; magnetic coupling; magnetic multilayers; magnetization; microactuator materials; perpendicular anisotropy; soft phase; sputtered films; thickness dependence; uniaxial anisotropy; Anisotropic magnetoresistance; Couplings; Iron; Magnetic anisotropy; Magnetic films; Magnetic multilayers; Magnetic resonance; Magnetization; Perpendicular magnetic anisotropy; Springs;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801985
