Tip Interface Exchange-Coupling Based on "Bi-Anisotropic" Nanocomposites with Low Rare-Earth Content. - 文章详情页

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Specially　designed　SmCo5/Co　magnetic　nanocomposites　have　been　fabricated　by　a　＂bottom　up＂　process.　SmCo5　nanochips　were　first　prepared　by　solution-phase　chemical　synthesis　combined　with　reductive　annealing　and　then　coated　by　chemical　deposition　of　Co　nanorods.　Both　the　SmCo5　nanochips　and　Co　nanorods　are　anisotropic　and　could　be　simultaneously　aligned　under　the　external　magnetic　field.　Magnetic　measurements　applied　on　these　＂bi-anisotropic＂　SmCo5/Co　composites　show　high　magnetic　performance　with　the　Co　phase　content　in　a　wide　range　from　10　to　80　wt　%.　For　the　first　time　ever,　the　applicable　exchange-coupled　nanocomposites　with　a　rare-earth　content　lower　than　7　wt　%　was　realized,　which　exhibits　the　coercivity　close　to　10　kOe　and　remanence　31%　larger　than　that　of　single　phase　SmCo5.　3-D　micromagnetic　simulations　were　performed　to　reveal　that　the　reversal　mechanism　in　the　Co　phase　was　transferred　from　the　incoherent　mode　to　the　coherent　mode　under　a　tip　interface　exchange-coupling　with　a　SmCo5　surface.

关键词：

OOMMF permanent magnet low rare-earth content nanocomposite anisotropy SmCo5/Co

作者机构：

[ 1 ] [Wu Qiong]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Ma Xiangyu]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Yue Ming]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Cong Liying]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Ma Zhenhui]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Zhang Dongtao]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
[ 7 ] [Li Yuqing]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
[ 8 ] [Wang Yatao]College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China

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