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引言为了提高磁盘的记录密度,需要研制一种具有优良特性的薄记录介质,这些特性包括:高矫顽力、大的剩余磁化强度、强的抗磨损和抗腐蚀能力。把磁性氧化物颗粒分散在粘合剂中的磁胶,其抗磨损和抗腐蚀能力优良。但如果减小厚度而同时又不增加颗粒填充部分,那么介质的磁通就会减少,输出信号电平也会下降。采用连续的金属薄膜,可减小记录层的厚度,同时仍然具有和厚的氧化物磁层相当的磁通,这是因为铁磁性金属的磁通密度远高于由氧化铁
Introduction In order to increase the recording density of magnetic disks, it is necessary to develop a thin recording medium with excellent characteristics including high coercivity, large remanent magnetization, strong abrasion resistance and corrosion resistance. Magnesia, which disperses magnetic oxide particles in a binder, is excellent in abrasion and corrosion resistance. However, if the thickness is reduced without increasing the particle filling, the flux of the medium is reduced and the level of the output signal is reduced. With a continuous thin metal film, the thickness of the recording layer can be reduced while still having a magnetic flux equivalent to that of a thick oxide magnetic layer because the magnetic flux density of the ferromagnetic metal is much higher than that of the ferrite