Structure, Magnetic Properties, and Coercivity Mechanism of Rapidly Quenched MnxGa Ribbons
Structure, Magnetic Properties, and Coercivity Mechanism of Rapidly Quenched MnxGa Ribbons
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DOI：
10.1109/intmag.2015.7157189
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发表时间：
2015
影响因子：
2.1
通讯作者：
W. Gong;X. Zhao;W. Fan;J. Feng;A. Lin;J. He;W. Liu;Z. Zhang
中科院分区：
文献类型：
--
作者：
W. Gong;X. Zhao;W. Fan;J. Feng;A. Lin;J. He;W. Liu;Z. Zhang
研究了快淬无稀土L10-Mn1.86Ga和D 022-Mn 3Ga永磁薄带的显微组织、磁性能和磁化机理。在L10-Mn1.86Ga薄带中获得了61.3emu/g的高剩磁和2.1MGOe的最大磁能积。L_（10）-Mn_（1.86）Ga和D_（022）-Mn_3Ga的矫顽力HC分别为2.7和6.9kOe。通过测量小回线和Henkel图，讨论了不同的双折射机制和交换耦合行为。L10-Mn1.86Ga薄带中晶界处的次要第二相可能作为畴壁的钉扎中心，从而降低交换耦合。居里温度>700 K的两种薄带都有可能成为室温永磁材料。
The microstructure, magnetic properties, and coercivity mechanism of rapidly quenched rare-earth-free L10-Mn1.86Ga and D022-Mn3Ga permanent magnetic ribbons have been investigated. The high remanence Mr of 61.3 emu/g and maximum energy product of 2.1 MGOe are obtained in L10-Mn1.86Ga ribbons. The coercivity HC of L10-Mn1.86Ga and D022-Mn3Ga is 2.7 and 6.9 kOe, respectively. The different coercivity mechanisms and exchange coupling behavior have been discussed, upon the measurement of minor loops and Henkel plots. The minor second phase at grain boundaries in L10-Mn1.86Ga ribbons may act as a pinning center of domain wall, thus reduce the exchange coupling. Both ribbons with Curie temperature >700 K may be promising permanent magnets at room temperature.