TY - JOUR
T1 - Oxidation fabrication and enhanced soft magnetic properties for core-shell FeCo/CoFe2O4 micron-nano composites
AU - Yang, Bai
AU - Li, Xiaopan
AU - Guo, Ruiyuan
AU - Yu, Ronghai
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/5/5
Y1 - 2017/5/5
N2 - FeCo/CoFe2O4 micron-nano composites have been fabricated by controllably oxidizing micron-sized FeCo particles. High-purity 60-nm-thick CoFe2O4 layers can be formed in situ on the surface of the unoxidized FeCo particles to form a dense FeCo/CoFe2O4 core-shell structure. The good intrinsic magnetic properties, including a high saturation magnetization of 210 A·m2·kg− 1 and a low coercivity of 11.7 Oe, are obtained in these FeCo/CoFe2O4 composites due to the nanoscale thickness of the ferrimagnetic CoFe2O4 layers. For traditional soft magnetic composites, low core loss can only be obtained by seriously sacrificing their magnetic induction. In this work, balanced soft magnetic properties with low core loss and high magnetic induction are obtained in the fully compacted FeCo/CoFe2O4 composites, which promise great potential applications in high-power and high-frequency magnetic devices. This controlled surface oxidation may also provide an effective surface treatment for metal-based soft magnets to improve their overall performance.
AB - FeCo/CoFe2O4 micron-nano composites have been fabricated by controllably oxidizing micron-sized FeCo particles. High-purity 60-nm-thick CoFe2O4 layers can be formed in situ on the surface of the unoxidized FeCo particles to form a dense FeCo/CoFe2O4 core-shell structure. The good intrinsic magnetic properties, including a high saturation magnetization of 210 A·m2·kg− 1 and a low coercivity of 11.7 Oe, are obtained in these FeCo/CoFe2O4 composites due to the nanoscale thickness of the ferrimagnetic CoFe2O4 layers. For traditional soft magnetic composites, low core loss can only be obtained by seriously sacrificing their magnetic induction. In this work, balanced soft magnetic properties with low core loss and high magnetic induction are obtained in the fully compacted FeCo/CoFe2O4 composites, which promise great potential applications in high-power and high-frequency magnetic devices. This controlled surface oxidation may also provide an effective surface treatment for metal-based soft magnets to improve their overall performance.
KW - Controlled surface oxidation
KW - FeCo/CoFeO composites
KW - High magnetic induction
KW - Low core loss
UR - https://www.scopus.com/pages/publications/85013856571
U2 - 10.1016/j.matdes.2017.02.073
DO - 10.1016/j.matdes.2017.02.073
M3 - 文章
AN - SCOPUS:85013856571
SN - 0264-1275
VL - 121
SP - 272
EP - 279
JO - Materials and Design
JF - Materials and Design
ER -