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Microstructure and magnetic properties of Ti/CoCrPt/Ti pseudo-sandwich nanogranular films

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5 Author(s)
H. Y. Sun ; Coll. of Phys. Sci. & Inf. Eng., Hebei Normal Univ., Shijiazhuang, China ; J. Hu ; Z. F. Su ; J. L. Xu
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We prepared Ti/CoCrPt/Ti pseudo-sandwich granular films by radio-frequency and dc magnetron sputtering onto glass substrates and subsequent in situ annealing. We investigated the microstructure and magnetic properties of the films as a function of Ti overlayer thickness (x). X-ray diffraction profiles show that the CoCrPt magnetic layers are formed as the hexagonal close-packed (HCP) structure. Vibrating sample magnetometer measurements indicate that the out-of-plane coercivity reaches the maximum 1675.5 Oe when x=5 nm. Atomic force microscopy images show the minimum average grain size D=7.2 nm and the average roughness Ra=1.0 nm. Magnetic force microscopy images show that the minimum average magnetic cluster size is about 6.4 nm at x=5 nm.

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IEEE Transactions on Magnetics  (Volume:42 ,  Issue: 7 )