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THIN MAGNETIC FILM, METHOD OF MANUFACTURING THE SAME, AND HIGH FREQUENCY OSCILLATOR, MAGNETIC HEAD, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS USING THIN MAGNETIC FILM

  • US 20140139952A1
  • Filed: 07/19/2013
  • Published: 05/22/2014
  • Est. Priority Date: 11/16/2012
  • Status: Active Grant
First Claim
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1. A thin magnetic film comprising:

  • a nonmagnetic substrate;

    a ruthenium underlayer formed on the nonmagnetic substrate; and

    a magnetic layer formed in contact with the ruthenium underlayer, having a negative anisotropy of −



    106 to −

    1.2×

    107 erg/cm3 (−



    108 to −

    1.2×

    109 nJ/cm3) in a normal line direction perpendicular to a surface of the magnetic layer, and mainly containing Co1-xIrx (x=10 to 45 at %).

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