论文部分内容阅读
研究了Tb_(0.3)Dy_(0.7)Fe_2合金在压磁和磁弹性效应中的磁畴偏转和磁导率特性.基于Stoner-Wolhfarth模型能量极小原理,绘制了自由能与磁畴偏转角度的关系曲线,研究了压应力和磁场载荷作用下磁畴角度的偏转特性,计算分析了不同载荷作用下磁畴偏转的磁导率特性,并与实验数据进行比较论证.研究表明,应力和磁场的作用都将使磁畴方向[111]和[(?)]发生角度跃迁,直观有效地解释了材料巨磁致伸缩效应的机理;应力和磁场作用下磁畴的偏转将使材料磁导率呈减小趋势,其中磁场能对磁导率的影响大于应力能,这一现象在小载荷作用下尤为明显.实验结果表明,磁导率的计算数据与实验数据符合得较好,验证了计算方法的正确性.理论分析对Terfenol-D磁畴偏转模型的完善和磁化过程中磁滞回线的绘制非常有意义.
The magnetic domain deflection and permeability in Tb_ (0.3) Dy_ (0.7) Fe_2 alloy were investigated. Based on the principle of Stoner-Wolhfarth energy minimization, the free energy and the deflection angle The relationship between the magnetic field deflection and the magnetic field deflection under different compressive and magnetic field loads was studied and compared with the experimental data.The results show that the stress and magnetic field The action of angle will cause the angle transition of [111] and [(?)] In the magnetic domain to explain the mechanism of giant magnetostriction of the material visually and effectively. The deflection of the magnetic domain under the stress and magnetic field will make the material permeability The effect of magnetic field on the permeability is greater than that of the stress, especially under the condition of small load.Experimental results show that the calculated data of magnetic permeability are in good agreement with the experimental data, and the calculation method is validated The theoretical analysis of Terfenol-D magnetic domain deflection model and the magnetization process of hysteresis loop drawing is very meaningful.