Abstract
A study of the magnetic and structural properties of (Co–Ni)3Pt alloy thin films epitaxially grown onto Al2O3(00∙1) substrates has been carried out. The (CoNi)3Pt and Ni3Pt films deposited in a temperature range of 300–450°C show a partial superlattice ordering. The perpendicular magnetic anisotropy Ku is found to increase with order parameter S. For deposition temperatures of about TS=400°C, the Ku becomes 8×105erg∕cc at S=0.3 for Ni3Pt and 4×106erg∕cc for (CoNi)3Pt at S=0.4 compared to 2×107erg∕cc at S=0.7 for Co3Pt films.
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