Magnetic recording medium and method of producing the same

Abstract

A method of producing a magnetic recording medium including the steps of preparing alloy particles capable of forming a CuAu type or Cu 3 Au type ferromagnetic order alloy phase, forming an alloy particle layer on a support using the alloy particles, oxidizing the alloy particles, and annealing the alloy particle layer in a magnetic field under a reducing atmosphere. Also disclosed is a magnetic recording medium produced by the method, that is, a magnetic recording medium including a magnetic layer which contains magnetic particles in a CuAu type or Cu 3 Au type ferromagnetic order alloy phase and which has a squareness ratio of 0.75 or higher.

1 - 15 . (canceled)  
     
     
         16 . A magnetic recording medium produced by a method comprising the steps of: 
 preparing alloy particles capable of forming a CuAu type or Cu 3 Au type ferromagnetic order alloy phase;    forming an alloy particle layer on a support using the alloy particles;    oxidizing the alloy particles; and    annealing the alloy particle layer in a magnetic field under a reducing atmosphere.    
     
     
         17 . The magnetic recording medium of  claim 16 , wherein a squareness ratio is 0.75 or higher.  
     
     
         18 . A magnetic recording medium comprising a magnetic layer containing magnetic particles in a CuAu type or Cu 3 Au type ferromagnetic order alloy phase, wherein a squareness ratio of the magnetic layer is 0.75 or higher.  
     
     
         19 . The magnetic recording medium of  claim 18 , wherein a squareness ratio of the magnetic layer is 0.8 or higher.  
     
     
         20 . The magnetic recording medium of  claim 18 , wherein a squareness ratio of the magnetic layer is 0.9 or higher.