Magnetization dependence on dynamic strain in ferromagnetic shape memory Ni-Mn-Ga
Magnetization dependence on dynamic strain in ferromagnetic shape memory Ni-Mn-Ga
复制标题
铁磁形状记忆 Ni-Mn-Ga 中动态应变的磁化强度依赖性
DOI：
10.1063/1.2969799
复制
发表时间：
2008
影响因子：
4
通讯作者：
M. Dapino
中科院分区：
文献类型：
--
作者：
N. Sarawate;M. Dapino
介绍了用作动态变形传感器的商用Ni-Mn-Ga材料的特性。在0.2~160赫兹的频率范围内，通过实验确定了磁通密度作为循环应变载荷的函数。随着频率的增加，应力-应变响应基本不变，而磁通密度-应变响应表现出越来越大的滞后。这一行为表明，双变量重取向发生在机械加载的同时，而磁化矢量的旋转随着加载频率的增加而延迟发生。在动态传感应用中使用该材料时，必须考虑不断增加的磁化滞后。
The characterization of commercial Ni–Mn–Ga for use as a dynamic deformation sensor is addressed. The flux density is experimentally determined as a function of cyclic strain loading at frequencies from 0.2to160Hz. With increasing frequency, the stress versus strain response remains almost unchanged whereas the flux density versus strain response shows increasing hysteresis. This behavior indicates that twin-variant reorientation occurs in concert with the mechanical loading, whereas the rotation of magnetization vectors occurs with a delay as the loading frequency increases. The increasing magnetization hysteresis must be considered when utilizing the material in dynamic sensing applications.