反铁磁交换耦合纳米磁体的巨稳定性
Colossal stability of antiferromagnetically exchange coupled nanomagnets
摘要：
双稳态纳米磁体存储二进制信息位。交换耦合纳米磁体可以增加低尺寸下的热稳定性。在这里，我们表明，反铁磁（AFM）耦合的纳米磁体可以在低尺寸比铁磁（FM）耦合的纳米磁体是高度稳定的。通过求解室温下磁化动力学的随机Landau-Lifshitz-Gilbert方程，分析了交换耦合纳米磁体在相关、非相关和反相关噪声存在下的稳定性.结果表明，关联噪声可以使原子力显微镜耦合纳米磁体的稳定性非常高。这种发现将导致非常高密度的非易失性存储和逻辑器件在我们未来的信息处理系统。
英文摘要：
Bistable nanomagnets store a binary bit of information. Exchange coupled nanomagnets can increase the thermal stability at low dimensions. Here we show that the antiferromagnetically (AFM) coupled nanomagnets can be highly stable at low dimensions than that of the ferromagnetically (FM) coupled nanomagnets. By solving stochastic Landau-Lifshitz-Gilbert equation of magnetization dynamics at room temperature, we analyze the stability of the exchange coupled nanomagnets in the presence of correlated, uncorrelated, and anti-correlated noise. The results show that the correlated noise can make the stability of the AFM coupled nanomagnets very high. Such finding will lead to very high-density non-volatile storage and logic devices in our future information processing systems.
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