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MAGNETIC RECORDING MEDIUM

  • US 20100227201A1
  • Filed: 03/02/2010
  • Published: 09/09/2010
  • Est. Priority Date: 03/03/2009
  • Status: Abandoned Application
First Claim
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1. A magnetic recording medium comprising a nonmagnetic substrate, and a soft magnetic layer and a ferromagnetic layer having a thickness of 5 to 150 nm formed in this order on the nonmagnetic substrate, whereinthe ferromagnetic layer contains a spherical, ellipsoidal or plate-form ferromagnetic powder and a binder, and has an axis of easy magnetization substantially in a perpendicular direction, andthe soft magnetic layer contains a spherical or ellipsoidal magnetite soft magnetic powder having a particle size of 30 nm or less, a rate of variation in particle size of 20% or less and a saturation magnetization of 10 to 60 Am2/kg, and a binder.

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