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Hexagonal ferrite magnetic powder, method for producing the same and magnetic recording medium

  • US 20070020489A1
  • Filed: 06/20/2005
  • Published: 01/25/2007
  • Est. Priority Date: 06/21/2004
  • Status: Active Grant
First Claim
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1. A hexagonal ferrite magnetic powder having an average tabular diameter of from 15 to 28 nm, a coercive force (Hc) of from 2,000 to 5,000 Oe (from 160 to 400 kA/m), a switching field distribution (SFD) of from 0.3 to 0.7 and a D70/D50 of from 1.05 to 1.25.

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