Nippon Telegraph and Telephone Corporation

Mitsubishi Materials Corporation

Dai Nippon Insatsu Kabushiki Kaisha

Yasuaki Yoshioka

Takuo Takeshita

Yoshinari Ishii

Kouichi Ishiyama

Ginya Ishiguro

Hachiro Saito

A magnetic recording powder for use as a material for magnetic recording media including magnetic tapes and magnetic cards, the powder having a high coercive force at room temperatures and a low Curie point, consists of at least one element selected from the group consisting of Y and rare-earth elements (R): 5-20 atomic %, B: 5-20 atomic %, Mn: 4-20 atomic %; and Fe and inevitable impurities: the balance. If required, the powder may further contain Al: 1-10 atomic %, and/or Cr: 1-10 atomic %. The powder has a mean particle size of 0.5-2 .mu.m and a mean crystal grain size of 0.1-0.4 .mu.m.

Magnetic recording powder having a high coercive force at room

Growing community of inventors

Tokyo, Japan

Yasuaki Yoshioka