磁比特稳定性：畴壁和单畴翻转之间的竞争
Magnetic bit stability: Competition between domain-wall and monodomain switching
摘要：
数值研究了由磁椭圆实现的计算机存储器的热稳定性。在实际磁性随机存取存储器装置的情况下，位可在切换事件期间形成自旋纹理。为了研究热致开关的能量势垒，我们开发了一个变分过程，迫使位遍历一个光滑的路径，通过配置空间之间的稳定点。我们确定纹理配置实现畴壁传播，这可能有一个能量势垒小于相应的单畴模型。我们对比出现这种微磁效应的热与场致开关。
英文摘要：
We numerically study the thermal stability properties of computer memory storage realized by a magnetic ellipse. In the case of practical magnetic random-access memory devices, the bit can form a spin texture during switching events. To study the energy barrier for thermally-induced switching, we develop a variational procedure to force the bit to traverse a smooth path through configuration space between the points of stability. We identify textured configurations realizing domain-wall propagation, which may have an energy barrier less than that of the corresponding monodomain model. We contrast the emergence of such micromagnetic effects in thermal versus field-induced switching.
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