Phase evaluation, magnetic, and electric properties of Mn60+xGa40−x (x = 0–15) ribbons
Phase evaluation, magnetic, and electric properties of Mn60+xGa40−x (x = 0–15) ribbons
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DOI：
10.1063/1.4868081
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发表时间：
2014-03
影响因子：
3.2
通讯作者：
J. Feng;Xuyao Zhao;X. Ning;C. Shih;W. Chang;Song Ma;W. Liu;Zongxin Zhang
中科院分区：
文献类型：
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作者：
J. Feng;Xuyao Zhao;X. Ning;C. Shih;W. Chang;Song Ma;W. Liu;Zongxin Zhang
用熔体快淬法制备了Mn60+xGa40−x(x=0，5，10，15)薄带，并在673K下进行1h的热处理，发现了磁相Mn8Ga5，Mn1.86Ga，D019-Mn3Ga和D022-Mn3Ga。当x从0变化到5时，薄带的居里温度T_c在125~185K之间变化。当x=10时，D019-Mn3Ga相的六方结构在相变温度T_d=185K以下扭曲为正交结构。对于x=0，5，10和15的薄带，室温下的最佳矫顽力分别为0.13，4.4，8.1和7.7Koe。电阻测量表明，当x=5-15时，薄带表现出典型的金属行为。
Mn60+xGa40−x (x = 0, 5, 10, and 15) ribbons were prepared by the melt-spinning technique and subsequently by a heat treatment at 673 K for 1 h. The magnetic phases Mn8Ga5, Mn1.86Ga, D019-Mn3Ga, and D022-Mn3Ga are found to appear in these annealed melt-spun ribbons. The Curie temperature TC of the ribbons varies from 125 K to 185 K as x changes from 0 to 5. For x = 10, the hexagonal structure of the D019-Mn3Ga phase is distorted to an orthorhombic one below the phase transition temperature Td = 185 K. The optimized values for coercivity at room temperature are 0.13, 4.4, 8.1, and 7.7 kOe for the ribbons with x = 0, 5, 10, and 15, respectively. The resistance measurements indicate that the ribbons show a typical metallic behavior for x = 5–15.