Magnetic properties of the SmCo-based permanent magnetic films prepared on hot substrate with Mo and Cr underlayer without subsequent annealing process were investigated by vibrating sample magnetometer (VSM), X-ray diffraction (XRD), and en-ergy dispersive X-ray spectroscopy (EDS). The results showed that the film thickness of the SmCo-based films presented complex effect on the intrinsic coercivity Hci. Optimal Hci for the films with Mo underlayer, Cr underlayer, and without underlayer was ob-served with different film thicknesses. Furthermore, the monotonous temperature dependence of Hci was found to be strongly corre-lated with the magnetic parameters for the 3.0μm thick SmCo7 films with Mo underlayer. From 25 to 300 °C, the Hci decreased from 281.6 to 211.2 kA/m with a temperature coefficient of-0.091%/°C, exhibiting good temperature stability.
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