横向氧化Au/Co/Au纳米柱的交换偏置
Exchange bias in laterally oxidized Au/Co/Au nanopillars
摘要：
通过胶体光刻连续三层制备的Au/Co/Au纳米柱表现出增强的矫顽场和相对于连续层的交换偏置场的外观。这归因于在盘制造时出现的Co夹层的横向氧化。通过蒙特卡罗模拟，分析了交换偏置场对Co纳米点尺寸和氧化程度的依赖关系，并阐明了其微观起源。
英文摘要：
Au/Co/Au nanopillars fabricated by colloidal lithography of continuous trilayers exhibit and enhanced coercive field and the appearance of an exchange bias field with respect to the continuous layers. This is attributed to the lateral oxidation of the Co interlayer that appears upon disc fabrication. The dependence of the exchange bias field on the Co nanodots size and on the oxidation degree is analyzed and its microscopic origin clarified by means of Monte Carlo simulations based on a model of a cylindrical dot with lateral core/shell structure.
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