Negative Magnetoresistivity of ErBi and Its Crystal-Field Levels

一条理论途径被概括并且在这个工作采用了在外部磁场评估 ErBi 的磁电机抵抗力。计算结果和理论分析证明当一个外部磁场在 z 方向被使用时，磁电机抵抗力能由于水晶地层次上升的退化更加被减少。然而，当磁场沿着 X 轴被施加时，因为 Er 离子和它的转变的新磁性的状态的形成，磁电机抵抗力将被增加在以内并且在这些新状态之间。

A theoretical approach is generalized and employed in this work to evaluate the magnetoresistivity of ErBi in external magnetic fields. The calculated results and theoretical analyses show that when an external magnetic field is applied in the z-direction, the magnetoresistivity can be reduced considerably due to the degeneracy lifting of the crystal-field levels. However, when the magnetic field is exerted along the x-axis, the magnetoresistivity will be increased because of the formations of new magnetic states of the Er ion and its transitions within and between these new states.