Patent ID: 6753084
Filing Date: 2004-06-22
Classification: G11B,Y10S

Abstract:
Spindle-shaped magnetic alloy particles containing Fe and Co as main components, having a cobalt content of 20 to 50 atm %, calculated as Co, based on whole Fe; an average major axis diameter (L) of 0.03 to 0.10 &mgr;m; a coercive force value of 159.2 to 238.7 kA/m (2,000 to 3,000 Oe); a crystallite size of 100 to 160 Ã¥; an activation volume (Vact) of 0.01 to 0.071E-4 &mgr;m3; and a squareness (&sgr;r/&sgr;s) of 0.52 to 0.55.