Co-Fe-Ni magnetic film having a high saturation magnetic flux density, composite thin film magnetic head using the film and magnetic memory device using the head

This invention relates to a magnetic pole material for a magnetic head, a composite thin film magnetic head using the same, and a magnetic memory device comprising the composite thin film magnetic head. A Co-Fe-Ni magnetic film has a composition represented by a chemical formula of CoFeNi(50 x 80, 2...

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Bibliographic Details
Main Authors Ohashi, Keishi, Saito, Mikiko, Toba, Tamaki
Format Patent
LanguageEnglish
Published 14.01.2003
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Summary:This invention relates to a magnetic pole material for a magnetic head, a composite thin film magnetic head using the same, and a magnetic memory device comprising the composite thin film magnetic head. A Co-Fe-Ni magnetic film has a composition represented by a chemical formula of CoFeNi(50 x 80, 20 y 40, and 3 z<10 (wt %)) and has an average grain size not greater than 40 nm. The Co-Fe-Ni magnetic film is prepared by electroplating. A magnetic head comprises the magnetic film as a magnetic pole layer. A magnetic memory device comprises a combination of the magnetic head and a magnetic recording medium having a high coercive force between 3500 and 7000 Oe, both inclusive.