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arXiv 1108.6071cond-mat.mtrl-scicond-mat.dis-nn
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减少人工可果美冰中的无序

Reducing Disorder in Artificial Kagome Ice

Stephen A. Daunheimer, Olga Petrova, Oleg Tchernyshyov, John Cumings

摘要:

人工自旋冰已经成为在微观水平上理解磁相互作用的有价值的工具。这种方法的优势在于合成的纳米级磁体阵列能够模拟由原子磁矩组成的晶体材料。不幸的是,这些由金属合金图案化的纳米级磁体可以在相关量(例如矫顽场)上显示出显著的变化,偏差高达6%。通过仔细研究人工鹿目冰的反转过程,我们可以直接测量磁率的分布,并且通过从断开的岛切换到连接的结构,我们发现磁率分布可以实现仅3.3%的偏差。这些狭窄的偏差应该允许观察行为,更接近地模仿典型的自旋冰材料。

英文摘要:

Artificial spin ice has become a valuable tool for understanding magnetic interactions on a microscopic level. The strength in the approach lies in the ability of a synthetic array of nanoscale magnets to mimic crystalline materials, composed of atomic magnetic moments. Unfortunately, these nanoscale magnets, patterned from metal alloys, can show substantial variation in relevant quantities such as coercive field, with deviations up to 6%. By carefully studying the reversal process of artificial kagome ice, we can directly measure the distribution of coercivities, and by switching from disconnected islands to a connected structure, we find that the coercivity distribution can achieve a deviation of only 3.3%. These narrow deviations should allow the observation of behavior that mimics canonical spin-ice materials more closely.

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。

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