论文标题
磁性弹性体的临界弯曲和磁性记忆效应
Critical bending and magnetic shape memory effect in magnetoactive elastomers
论文作者
论文摘要
提出了一项由带有嵌入的铁磁颗粒的弹性弹性弹性体（MAE）的研究结果。磁场引起的连续临界弯曲，其特征是弯曲幅度的临界指数，其衍生物首次在临界区域中具有奇异性。机械稳定性损失和磁态相互关联的磁状态的对称性降低发生在临界点。高对称状态（临界点以下）中的磁化沿磁场定向，并且不存在扭矩。在临界点上方，磁化强度和磁场是非共线性的，并且会产生扭矩，这与弯曲是自一成能的。发现MAE弯曲的磁场依赖性被发现具有磁滞，这与磁透明效应有关。还可以在由磁化，冷却（H =/0）和加热（H = 0）组成的循环中获得MAE弯曲的形状记忆效应。研究了基质的临界玻璃过渡温度及其熔化/固化温度对磁形状记忆效应的影响。
The results of a study of magnetoactive elastomers (MAEs) consisting of an elastomer matrix with embedded ferromagnetic particles are presented. A continuous critical bending induced by the magnetic field, characterized by a critical exponent for the bending magnitude, and the derivative of which has a singularity in the critical region is reported for the first time. The mechanical stability loss and the symmetry reduction of the magnetic state, which are interrelated with each other, take place at the critical point. The magnetization in the high-symmetric state (below the critical point) is directed along the magnetic field and the torque is absent. Above the critical point, the magnetization and the magnetic field are noncollinear and there arises a torque, which is self-consistent with the bending. The magnetic field dependence of the MAE bending was found to have a hysteresis, which is associated with the magneto-rheological effect. The shape memory effect was also obtained for the MAE bending in a cycle consisting of magnetization, cooling (at H=/0), and heating (at H=0). The influence of the critical glass transition temperature of the matrix, as well as its melting/solidification temperature, on the magnetic shape memory effect was studied.
