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FePt/Ag]10 multilayers were deposited on glass substrates by magnetron sputtering. After being annealed at 550℃ for 30 min, the coercivities of [FePt/Ag]10 multilayer films were observably improved. Magnetic properties of [FePt/Ag]10multilayer films are influenced by the Ag content. The highest coercivity is obtained for those multilayer films that the Ag content is about 25%. The analysis for the re- manence curves shows that the lower FePt layer thickness is favorable for decreasing the intergranular interaction. Re- sult of XRD shows that a thick Ag layer can enhance the intensity of FePt(001) peak. A magnetic activation volume of the order of 10?24 m3 is obtained by the measurement of magnetic viscosity, showing that it is promising to be ultra- high density recording media.
FePt / Ag] 10 multilayers were deposited on glass substrates by magnetron sputtering. After being annealed at 550 ° C for 30 min, the coercivities of 10 multilayer films were observably improved. Magnetic properties of [FePt / Ag] 10multilayer films are influenced by the content of the Ag. The highest coercivity is obtained for those multilayer films that the Ag content is about 25%. The analysis for the re- manence curves shows that the lower FePt layer thickness is favorable for decreasing the intergranular interaction. Re- A magnetic activation volume of the order of 10? 24 m3 is obtained by the measurement of magnetic viscosity, showing that it is promising to be ultra- high density recording media.