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A facile approach for screening isolated nanomagnetic behavior for bit-patterned media

机译：一种用于筛选位模式介质的孤立纳米磁行为的简便方法

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Bit-patterned media (BPM) fabricated by the direct deposition of magnetic material onto prepatterned arrays of nanopillars is a promising approach for increasing magnetic recording of areal density. One of the key challenges of this approach is to identify and control the magnetic interaction between the bits (on top of the nanopillars) and the trench material between the pillars. Using independent techniques, including magnetic force microscopy, the variable-angle magneto-optic Kerr effect, and remanence curves, we were able to determine the presence and relative intensities of exchange and dipolar interactions in Co-Pd multilayer-based BPM fabricated by direct deposition. We found that for pitches of 30 nm or less, there were negligible exchange interactions, and the bits were found to be magnetically isolated. As we move to higher densities, the absence of exchange interactions indicates that direct deposition is a promising approach to BPM fabrication.
机译：通过将磁性材料直接沉积到纳米柱的预图案化阵列上而制成的位图案化介质（BPM）是一种增加面密度磁记录的有前途的方法。这种方法的主要挑战之一是识别和控制钻头（位于纳米柱顶部）与立柱之间的沟槽材料之间的磁性相互作用。使用独立的技术，包括磁力显微镜，可变角度磁光Kerr效应和剩磁曲线，我们能够确定通过直接沉积制备的基于Co-Pd多层BPM的交换和偶极相互作用的存在和相对强度。我们发现，对于30 nm或更小的间距，交换相互作用可忽略不计，并且发现这些位是磁隔离的。随着我们向更高密度发展，交换相互作用的缺失表明直接沉积是BPM制造的一种有前途的方法。

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