纳米磁性系统中的复杂场反转动力学
Complex field reversal dynamics in nanomagnetic systems
AI总结：
本文采用Glauber平均场模型研究纳米磁体系统在外部磁场下的反转动力学，发现一维链和树形结构可解析表达并产生谐波谱，二维和三维则形成依赖场强和相互作用调谐的分形反转簇。
摘要：
纳米磁性材料由铁磁性材料的薄图案化薄膜构成，最初是作为受挫磁性的类比物而提出的。其低工作能耗和涌现特性使其成为基于物理器件的有力候选者。本文采用近期提出的纳米磁畴翻转模型——Glauber平均场模型，来理解纳米磁体系统在受到外部磁场对抗时如何演化。在零温度下的一维链和树形结构中，这种反转可以用解析形式表达，其中自旋翻转的级联产生谐波功率谱。在二维和三维中，同样的级联形成分形场反转簇，其形状取决于磁场强度以及纳米磁体之间相互作用的调谐。
英文摘要：
Nanomagnetic materials, built from thin, patterned films of ferromagnetic materials, began as analogues to frustrated magnetism. Their low energy of operation and emergent properties make them strong candidates for physics based devices. A recent model of how nanomagnetic domains flip, the Glauber mean-field model, is used here to understand how systems of nanomagnets evolve when opposed by external field. This reversal can be expressed in an analytical form in the case of one-dimensional chains and trees at zero temperature, where the cascade of spin flips gives rise to harmonic power spectra. The same cascades in two and three dimensions form fractal field reversal clusters whose shape depends on the strength of the field and the tuning of interactions between nanomagnets.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
