Magnetic recording media with magnetic bit regions patterned by ion irradiation
作者： Eric Edward Fullerton , Dieter Klaus Weller
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摘要: A patterned magnetic recording disk has a layer into discrete and nonmagnetic regions having substantially the same chemical composition. The have chemically-ordered L1 2 crystalline structure chemically-disordered structure. intermetallic compound FePt 3 , which is nonferromagnetic, rendered ferromagnetic by ion irradiation. This material can be irradiating local through mask to create that serve as bits. ions pass openings in impact selected corresponding pattern of holes mask. disrupt ordering Fe Pt atoms unit cell transform pattern, with film not impacted retaining their
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