SmCo5/Fe nanocomposites synthesized from reductive annealing of oxide nanoparticles

被引：88
作者：
Hou, Yanglong [1 ]
Sun, Shouheng
Rong, Chuanbing
Liu, J. Ping
机构：
[1] Brown Univ, Dept Chem, Providence, RI 02912 USA
[2] Univ Texas, Dept Phys, Arlington, TX 76019 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 15期
关键词：
D O I：
10.1063/1.2799170
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Hard magnetic nanocomposites SmCo5/Fe-x (x=0-2.9) are synthesized by a simultaneous calcium reduction of Sm-Co-O and Fe3O4 nanoparticles. The composites consist of nanostructured SmCo5 and Fe with their average grain sizes at 29 and 8 nm, respectively. The magnetic properties of the composites can be tuned by controlling Fe composition. SmCo5/Fe-1.5 shows an enhanced remanent magnetization at 56 emu/g (45 emu/g for SmCo5). The largest coercivity value of 11.6 kOe is achieved with SmCo5/Fe-0.23. The synthesis represents a general process toward SmCo-based exchange-spring nanocomposites for high performance permanent magnet applications. (C) 2007 American Institute of Physics.
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