Fast switching of a ground state of a reconfigurable array of magnetic nano-dots
Fast switching of a ground state of a reconfigurable array of magnetic nano-dots
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可重构磁性纳米点阵列基态的快速切换
DOI：
10.1063/1.4714772
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发表时间：
2012
影响因子：
4
通讯作者：
A. Slavin
中科院分区：
文献类型：
--
作者：
R. Verba;G. Melkov;V. Tiberkevich;A. Slavin
数值计算表明，轴向磁化磁性纳米点偶极耦合二维阵列的基态(铁磁或棋盘状反铁磁)和微波吸收频率可以通过施加偏置磁场脉冲(持续时间30-70 ns)来切换。切换到铁磁状态可以通过沿点轴施加矩形场脉冲来实现，而切换到反铁磁状态需要在点平面上取向并且具有足够长的后缘(尾部)的场脉冲。我们的结果证明，磁性纳米点阵列可以用作具有快速可重构磁性和微波性能的材料。
We show numerically that a ground state (ferromagnetic or chessboard antiferromagnetic) and microwave absorption frequency of a dipolarly coupled two-dimensional array of axially magnetized magnetic nano-dots can be switched by application of bias magnetic field pulses (duration 30–70 ns). Switching to the ferromagnetic state can be achieved by applying a rectangular field pulse along the dot axis while switching to the antiferromagnetic state requires the field pulse oriented in the dot plane and having a sufficiently long trailing edge (tail). Our results prove that arrays of magnetic nano-dots can be used as materials having rapidly reconfigurable magnetic and microwave properties.