Ag/FePt/C薄膜的结构和磁性

Abstract

Abstract:

An Ag/FePt/C thin film was deposited on Si (001) substrate by direct current and radio frequency magnetron sputtering at room temperature, then the as-deposited film was vacuum annealed at various temperatures so as to obtain L1₀-FePt thin film with high coercivity. The composition, structure and magnetic properties of the film were investigated by means of X-ray fluorescence, X-ray diffraction and vibrating sample magnetometer. The results indicate that disordered to ordered phase transformation took place when the film was annealed at 400 ℃. Ag underlayer could reduce the FePt ordering temperature. The grain size could be controlled by adding Ag and C elements. The grain size and coercivity increased with increasing annealing temperature. The average grain size of FePt in the thin film annealed at 600 ℃ is 14 nm, the out\|of\|plane and in\|plane coercivities are 798.16 kA/m and 762.35 kA/m, respectively.

Key words: magnetic recording material, L1₀-FePt, magnetron sputtering, structure, magnetic property

CLC Number:

O482

ZHANG Yu-Mei, LIU Mei, WANG Yong-Gong, CHEN Wei-Xia, LI Hai-Bei-. Structure and Magnetic Properties of Ag/FePt/C Thin Films[J].J4, 2010, 48(06): 1031-1033.

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Structure and Magnetic Properties of Ag/FePt/C Thin Films

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