Title :
Perpendicular Exchange Bias and Magnetic Anisotropy in FePt/FeMn Multilayers
Author :
Phuoc, Nguyen N. ; Suzuki, Takao
Author_Institution :
Inf. Storage Mater. Lab., Toyota Technol. Inst.
Abstract :
A systematic investigation of parallel and perpendicular exchange bias in FePt/FeMn multilayers is presented. Perpendicular magnetic anisotropy observed in FePt/FeMn multilayers is attributed to the surface anisotropy at the interface of FePt/FeMn. The surface and volume anisotropy constants are found to decrease with increasing temperature. The thickness (FePt) dependence of exchange bias field and blocking temperature are discussed. Of interest is the blocking temperature of the parallel exchange bias is higher than that of the perpendicular one, which is qualitatively explained by assuming that the spins at the FePt/FeMn are tilted
Keywords :
ferromagnetic materials; iron alloys; magnetic multilayers; manganese alloys; perpendicular magnetic anisotropy; platinum alloys; FePt-FeMn; magnetic multilayers; perpendicular exchange bias; perpendicular magnetic anisotropy; surface anisotropy; unidirectional anisotropy; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic films; Magnetic multilayers; Material storage; Perpendicular magnetic anisotropy; Reflectivity; Saturation magnetization; Temperature dependence; X-ray scattering; Multilayers; perpendicular exchange bias; perpendicular magnetic anisotropy; surface anisotropy; unidirectional anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879152
