Magnetic field hysteresis under various sweeping rates for Ni-Co-Mn-In metamagnetic shape memory alloys
Magnetic field hysteresis under various sweeping rates for Ni-Co-Mn-In metamagnetic shape memory alloys
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DOI：
10.1063/1.4821184
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发表时间：
2013-09
影响因子：
4
通讯作者：
Xiao Xu;T. Kihara;M. Tokunaga;A. Matsuo;W. Ito;R. Umetsu;K. Kindo;R. Kainuma
中科院分区：
文献类型：
--
作者：
Xiao Xu;T. Kihara;M. Tokunaga;A. Matsuo;W. Ito;R. Umetsu;K. Kindo;R. Kainuma
研究了Ni45Co5Mn36.7In13.3在不同扫频磁场下的磁场诱导相变。研究中使用了超导磁体产生的静磁场、飞轮直流发电机磁体产生的半静态磁场和电容组磁体产生的脉冲磁场，其扫频速度超过6个数量级。随着扫频速度的增加，磁滞增大。实验结果与唯象模型一致，确定了该合金热激活过程的激活能为0.7 eV。
Magnetic field-induced transition of Ni45Co5Mn36.7In13.3 was investigated under magnetic fields with different sweeping rates. A static magnetic field produced by a superconducting magnet, a semi-static magnetic field created by a flywheel DC generator-powered magnet, and a pulsed magnetic field resulting from a condenser bank-powered magnet were used in this study, which covers sweeping rates of more than 6 orders. The magnetic field hysteresis is enlarged with increasing sweeping rate. The experimental results were consistent with a phenomenological model, and the activation energy for the thermally activated process was determined to be 0.7 eV for this alloy.