Since L10 ordered Fe-Pt has very high uniaxial magnetic anisotropy, it is an attractive candidate for ultra-high-density storage using heat-assisted magnetic recording. But its Curie temperature of 500 ℃ needs to be lowered if a temperature rise above the Curie temperature is to be achieved by the use of moderate laser power. Control of the Curie temperature was investigated in Fe60-xNixPt40 thin films sputtered on quartz glass substrates. L10 phase (001) texture was found in all the films with

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... x = 0 to 24, indicating that the crystalline structure is L10 phase. XRD rocking curves revealed that the (001) orientation is much improved as x increases, while the order parameter S is gradually degraded, and the magnetic anisotropy energy is decreased. A Curie temperature of around 300 ℃, which may be suitable for heat-assisted magnetic recording, is obtained for x = 20 to 24.