Highly (001) oriented L10-CoPt/TiN multilayer films on glass substrates with perpendicular magnetic anisotropy

To obtain strong perpendicular magnetic anisotropy (PMA) based on L10 structure for magnetic storage devices, costly single crystalline substrates are generally required to achieve (001) texture. Recently, various studies also have focused on depositing different kinds of seed layers on glass or other amorphous substrates to promote (001) preferred orientation of L10 CoPt and FePt. TiN is a very promising seed layer material because of its cubic crystalline structure (similar to MgO) and excellent diffusion barring property even at high temperatures. In the present work, highly (001) oriented L10-CoPt/TiN multilayer films have been successfully deposited on glass substrates. After annealing at 700 °C, the film exhibits PMA, and a strong (001) peak is detected from the x-ray diffraction profiles, indicating the ordering transformation of CoPt layers from fcc (A1) to L10 structure. It also is found that alternate deposition of cubic TiN and CoPt effectively improves the crystallinity and (001) preferred ori...

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