Sm3(Fe,Co,Mo)29 compounds: promising materials for permanent magnets

• 来源期刊: 中国物理（英文版）
• 关键词: permanent magnet material anisotropy saturation magnetization Curie temperature
• 年，卷（期）: 2003,（6）
• 页码范围: 661-664
• 页数: 4页
• 语种: 英文

摘要

The outstanding hard-magnetic properties are reported of Sm3Fe28.1-xCoxMo0.9 compounds with x=12,14,16.In this alloy system,only a small amount of Mo is needed to stabilize the 3:29 structure so that the magnetic properties are not seriously affected by the presence of this nonmagnetic element.Substitution of Co for Fe leads to a significant increase of the magnetic anisotropy,and for x ≥ 14 the easy magnetization direction changes from easy plane to the easy axis.In this alloy system,the compound Sm3Fe12.1Co16Mo0.9 is a very promising candidate for permanent magnet applications.Its room temperature saturation magnetization(μ0Ms=1.5T) and anisotropy field(Ban=6.5 T) are comparable to the values for Nd2Fe14B(μ0Ms=1.6 T and Ban =7 T).However,the Curie temperature of Sm3Fe12.1Co16Mo0.9 is 1020K,which is appreciably higher than that for Nd2Fe14B(TC=588K).