| 摘要 |
PURPOSE:To enhance the magnetic characteristics and oxidation resistance by a method wherein R-Fe-M-N base material having a rhombohedral system or hexagonal system crystal structure is made to coexist with a material ele ment. CONSTITUTION:A magnetic material is expressed by Ralpha(Fe(1-gamma)Mgamma)(100-alpha-beta)NB, where R represents at least one kind of rare earth elements including Y, M represents at least one kind of elements out of Si, Ge, P, As, Sb, Be, alpha, beta satisfy the inequalities of 3<=alpha<=20, 3<=beta<=30 in atomic percentage, and gamma satisfies the inequality of 0.001<=gamma<=0.5 in atomic ratio. On the other hand, the phase including R, Fe, M and N contains rhombohedral system or hexagonal system crystalline structure in this magnetic material. This magnetic material can be manufactured by heat-treating an alloy represented by Ralpha/(100-beta)(Fe(1-gamma)Mgamma)(100-alpha-beta)(100-beta) within the temperature range of 200-650 deg.C in the atmosphere containing at least one kind of gas out of nitrogen gas and ammonia gas. Through these procedures, an R-Fe-M-N base magnetic material having excellent magnetic characteristics and oxidation resistance can be manufactured. |
