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Controllable Magnetization Processes Induced by Nucleation Sites in Permalloy Rings

机译:坡莫合金环中的成核位点诱导的可控磁化过程

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摘要

Different arrangements of notches as nucleation sites are demonstrated experimentally and numerically to effectively control the magnetization processes of permalloy rings. In the ring with notches at the same side with respect to field direction, two same-helicity vortex domain walls in the onion state lead to two-step switching going through flux-closure state; in the ring with diagonal notches two opposite-helicity vortex domain walls lead to one-step switching skipping flux-closure state. The switching processes are repeatable in contrast to rings without notches where helicites of two vortex domain walls are random so the switching processes can not be controlled.
机译:实验和数值证明了槽口作为成核位置的不同排列方式,可以有效地控制坡莫合金环的磁化过程。在相对于磁场方向在同一侧上具有槽口的环中,两个处于洋葱状态的相同螺旋涡流畴壁导致两步切换进入磁通封闭状态;在具有对角凹口的环中,两个相对螺旋线的涡旋畴壁导致单步切换跳过磁通闭合状态。与没有凹口的环相反,该转换过程是可重复的,其中两个涡旋畴壁的螺旋藻是随机的,因此无法控制转换过程。

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  • 来源
    《Japanese journal of applied physics》 |2010年第2issue1期|p.023001.1-023001.4|共4页
  • 作者单位

    Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan;

    Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan;

    Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan;

    Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan;

    Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan;

    Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan;

    Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan;

    Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan;

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