锥形合金基合成铁磁纳米点的降低矫顽力和开关场

X. Li, C. Leung, K. Lin, M. Chan, P. Pong
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引用次数: 0

摘要

自由层的矫顽力(Hc)和开关场(Hsw)随尺寸的减小而显著增大,从而降低了自旋电子器件的灵敏度。提出了一种基于contic合金的合成铁磁(SyF)三层,在纳米点中表现出比单层更低的Hc和Hsw。对厚度依赖性的研究表明,Hc和Hsw与放大因子呈线性关系。在200℃现场退火后,Hc和Hsw进一步降低。本研究提供了一种降低纳米磁体中Hc和Hsw的方法。
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Reduced magnetic coercivity and switching field in conetic-alloy-based synthetic-ferrimagnetic nanodots
The coercivity (Hc) and switching field (Hsw) of free layers increase remarkably with shrinking size, which reduces the sensitivity of spintronic devices. Conetic-alloy-based synthetic ferrimagnetic (SyF) trilayers are proposed to show reduced Hc and Hsw than single-layer in nanodots. The investigation on the thickness dependence reveals linear reliance of Hc and Hsw on amplification factor. Hc and Hsw are further reduced after field annealing at 200 °C. This work provides an approach to reduce the Hc and Hsw in nanomagnets.
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