Abnormal crystal structure stability of nanocrystalline Sm(2)Co(17) permanent magnet

作者：Song Xiaoyan^*; Lu Nianduan; Seyring Martin; Rettenmayr Markus; Xu Wenwu; Zhang Zhexu; Zhang Jiuxing

来源：Applied Physics Letters, 2009, 94(2): 023102.

DOI：10.1063/1.3040316

• cobalt alloys
• crystal structure
• magnetisation
• nanostructured materials
• nanotechnology
• permanent magnets
• samarium alloys

Abnormal crystal structure stability is discovered in the single-phase nanocrystalline Sm(2)Co(17) permanent magnet. Three kinds of crystal structures, namely the rhombohedral Th(2)Zn(17)-type (2:17 R), the hexagonal TbCu(7)-type (1:7 H), and the hexagonal Th(2)Ni(17)-type (2:17 H), are claimed to exist at room temperature in the Sm(2)Co(17) alloy system. The strong dependence of the magnetic properties on the structure characteristics in the single-phase Sm(2)Co(17) alloy is interpreted in view of the atom space occupancy and the exchange coupling between substructures especially in the nanocrystalline alloy.

• 出版日期2009-1-12
• 单位北京工业大学