Magnetic behaviour of ${}^{57}$Fe/Co/Al multilayers deposited on a glass substrate

[摘要] Multilayers of ${}^{57}$Fe/Co/Al 20 and 40 trilayers (TLs) prepared on a glass substrate using ion beam sputtering deposition techniques have been studied. Magnetization curves obtained at different angles show the anisotropic nature of both the samples. Both samples show strong in-plane uniaxial anisotropy. Negative $\delta m$ values suggest that dipolar type interactions between grains contribute to the in-plane uniaxial anisotropy. Angular dependence of coercivity indicates that the magnetization reversal mechanism is different for both samples. The variation in coercivity with azimuthal angle is wellreproduced in the 20 TL sample using the modified Kondorsky model and by the Stoner–Wohlfarth model in the 40 TL sample.

[学科分类] 材料工程

[关键词] Magnetic properties;magnetic multilayers;ion beam sputtering;magnetocrystalline anisotropy;uniaxial anisotropy;magnetization reversal.