The magnetic anisotropy of thin films for recording tapes with different composition and number of layers

The magnetic anisotropy fields measured with the method of second derivative of the perpendicular magnetization are analysed in Metal evaporated thin films for flexible recording media. Films with different composition and number of layers are studied. The evolution of the anisotropy is in relationship with the evolution in the macroscopic magnetic properties and with the structure of the analysed media, which influences the magnetization reversal.