MGO SEED LAYERS FOR COCRPT CR LONGITUDINAL MAGNETIC RECORDING/

Sputter deposited MgO thin films with the B1 crystal structure and (00 2) film texture are used as seed layers to improve the texture and mag netic properties of the CoCrPt/Cr magnetic thin films on glass substra tes for longitudinal recording. The desired (002) textured Cr underlay ers are usually obtained by sputtering Cr onto heated substrates. Howe ver, it is found that the MgO seed layers can induce the (002) film te xture in the Cr underlayers without using a heated substrate and hence , the overlying CoCrPt films are formed with the (11 (2) over bar 0) t exture. Vibrating-sample magnetometry measurements show greatly improv ed in-plane coercivities that are suitable for future high density rec ording media can be easily obtained. (C) 1995 American Institute of Ph ysics.