双轴对称Fe8铁磁颗粒基态的量子隧穿

摘要

In this paper,we discuss the tunneling of adding magnetic field to dual axle symmetric Fe8 ferromagnetic particles in hard-axis direction.We have adopted the effective potential model to simplify spin tunneling by which the constant mass particles are supposed to move in endohedral.We then calculated the ground energy splitting using the periodic instanton method.The results show that with the extension of the external field,the energy splitting changes periodically.%将双轴对称Fe8铁磁颗粒在难轴方向加磁场的隧穿问题,用等效势方法化简为常质量的粒子在等效势阱中运动的粒子,然后利用周期瞬子方法计算基态能级劈裂.结果表明随外场的增大,能级分裂作周期性变化.