Magnetic recording powder having a high coercive force at room temperatures and a low curie point

A magnetic recording powder for use as a material for magnetic recording media including magnetic tapes and magnetic cards, said powder having a high coercive force at room temperatures and a low Curie point, consisting 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 %;
• Al:
• 1-10 atomic %;
• and
• Fe and inevitable impurities:
• the balance, said powder having a mean particle size of 0.5-2 .mu.m and a mean crystal grain size of 0.1-0.4 .mu.m.

A magnetic recording powder for use as a material for magnetic recording media including magnetic tapes and magnetic cards, said powder having a high coercive force at room temperatures and a low Curie point, consisting 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 %;
• Cr:
• 1-10 atomic %;
• and
• Fe and inevitable impurities:
• the balance, said powder having a mean particle size of 0.5-2 .mu.m and a mean crystal grain size of 0.1-0.4 .mu.m.

A magnetic recording powder for use as a material for magnetic recording media including magnetic tapes and magnetic cards, said powder having a high coercive force at room temperature and a low Curie point, consisting 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 %;
• Al:
• 1-10 atomic %;
• Cr:
• 1-10 atomic %:
• and
• Fe and inevitable impurities:
• the balance, said powder having a mean particle size of 0.5-2 .mu.m and a mean crystal grain size of 0.1-0.4 .mu.m.