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利用Monte-Carlo方法模拟了不同长、短轴以及不同内径的椭圆钴纳米环的磁特性.模拟结果表明:对于偏心率较小的椭圆钴纳米环,当内径不大时,系统的磁滞回线与圆形钴纳米环的磁滞回线相当类似;当内径较大时,系统的磁滞回线与圆形钴纳米环的结果有很大的不同.当椭圆的偏心率增大时,由于存在较多的过渡状态,系统磁滞回线的台阶变得更为平滑,这可以通过系统的磁化过程进行解释.当椭圆的偏心率较大时,由于出现了大量的过渡状态,系统的磁滞回线呈现的台阶变得更加平滑.
The magnetic properties of elliptical cobalt nanorings with different long, short axes and different inner diameters were simulated by Monte-Carlo method.The simulation results show that for the elliptical cobalt nanorings with small eccentricity, when the inner diameter is not large, the hysteresis loop The hysteresis loop of the wire is quite similar to that of a circular cobalt nanowire. When the inner diameter is large, the hysteresis loop of the system is very different from that of a circular cobalt nanowire. When the eccentricity of the ellipse increases, Due to the existence of more transitional states, the step of the system’s hysteresis loop becomes smoother, which can be explained by the magnetization process of the system.When the elliptical eccentricity is large, due to the large number of transition states, Hysteresis loops appear to be smoother.