论文标题
磁性弹性体基于晶状体纳米颗粒，库里点接近室温
Magnetoactive elastomer based on superparamagnetic nanoparticles with Curie point close to room temperature
论文作者
论文摘要
由单位域LA0.8AG0.2MN1.2O3纳米颗粒组成的磁活性弹性体（MAE），在硅温度基质中的质量温度接近室温（TC = 308 K）的磁性弹性体已进行了准备和全面研究。已经发现，在室温及以上，MAE颗粒被磁化超帕磁化，低强化低于10 OE，并且磁各向异性对扭矩外观的影响是合理的。还建立了磁化和磁弹性之间的耦合。已经揭示了磁弹性出现的机理，包括通过磁化颗粒的MAE重排和MAE压缩的影响。已经发现，MAE的磁弹性特性在TC附近具有关键特征。 MAE的磁弹性特性消失在T> TC处，并在T <TC处恢复。这使得可以在室温下使用MAE作为具有自调节磁弹性特性的设备的智能材料。
A magnetoactive elastomer (MAE) consisting of single-domain La0.8Ag0.2Mn1.2O3 nanoparticles with a Curie temperature close to room temperature (TC = 308 K) in a silicone matrix has been prepared and comprehensively studied. It has been found that at room temperature and above, MAE particles are magnetized superparamagnetically with a low coercivity below 10 Oe, and the influence of magnetic anisotropy on the appearance of a torque is justified. A coupling between magnetization and magnetoelasticity has been also established. The mechanisms of the appearance of magnetoelasticity, including the effect of MAE rearrangement and MAE compression by magnetized particles, have been revealed. It has been found that the magnetoelastic properties of MAE have critical features near TC. The magnetoelastic properties of MAE disappear at T > TC and are restored at T < TC. This makes it possible to use MAE at room temperature as a smart material for devices with self-regulating magnetoelastic properties.
