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Magnetic recording medium and process for producing the same

  • US 20070231606A1
  • Filed: 04/02/2007
  • Published: 10/04/2007
  • Est. Priority Date: 03/31/2006
  • Status: Abandoned Application
First Claim
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1. A magnetic recording medium comprising a substrate and a magnetic layer containing ferromagnetic metal powder and a binder,wherein the ferromagnetic metal powder contains iron, cobalt and from 2 to 20 atom % of yttrium based on a total of iron and cobalt contained in the ferromagnetic metal powder and has an average length of 50 nm or smaller, andthe magnetic recording medium has a test value of at least 100 passes in a magnetoresistive head resistance reduction test performed as follows:

  • A 600 m long magnetic recording medium of tape form is recorded and repeatedly reproduced while being shuttled on a drive equipped with an MR head in a 13°

    C., 15% RH environment until the resistance of the MR head reduces by 40 Ω

    , and a number of passes of the tape at that time is a test value.

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