Magnetization switching and inverted hysteresis in perpendicular antiferromagnetic superlattices
Magnetization switching and inverted hysteresis in perpendicular antiferromagnetic superlattices
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DOI：
10.1063/1.4880821
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发表时间：
2014-05
影响因子：
4
通讯作者：
M. Charilaou;C. Bordel;F. Hellman
中科院分区：
文献类型：
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作者：
M. Charilaou;C. Bordel;F. Hellman
使用蒙特卡罗模拟研究了反铁磁 (AFM) 超晶格的磁化强度与施加场的函数关系。具有 N 个磁性层且层之间具有 AFM 耦合的系统的模拟磁滞回线表现出明显的阶跃，磁化强度随着 N 的增加而减小。具有奇数 N 的系统在 N > 3 时表现出 3 个阶跃和反向磁滞，而具有偶数 N 的系统在 N > 2 时表现出 4 个阶跃，并且它们的微观切换序列是不确定的，并且可以采取两种不同的路径，即使全局磁化强度的切换是完全可逆的。
The magnetization of antiferromagnetic (AFM) superlattices as a function of applied field was investigated using Monte Carlo simulations. The simulated hysteresis loops of systems with N magnetic layers with AFM coupling between the layers exhibit distinct steps with magnetization that decreases with increasing N. Systems with odd N exhibit 3 steps and inverted hysteresis for N > 3, whereas systems with even N exhibit 4 steps, for N > 2, and their microscopic switching sequence is non-deterministic and can take two distinct pathways, even though the switching of the global magnetization is exactly reversible.