纳米结构无稀土MnxGa薄膜的高矫顽力
Large Coercivity in Nanostructured Rare-earth-free MnxGa Films
摘要：
当用合适尺寸和取向的纳米颗粒制备时，MnxGa膜的磁滞表现出高达2.5 T的显著大的矫顽场。这种介电常数比有序外延薄膜和体材料的介电常数大一个数量级。增强的双折射率归因于大的磁晶各向异性和~ 50 nm尺寸的纳米颗粒的组合。通过反常的霍尔效应，大的介电常数也被复制到电学性质中。的磁势的大小接近发现在稀土磁体，使他们有吸引力的稀土磁铁的应用。
英文摘要：
The magnetic hysteresis of MnxGa films exhibit remarkably large coercive fields as high as 2.5 T when fabricated with nanoscale particles of a suitable size and orientation. This coercivity is an order of magnitude larger than in well-ordered epitaxial film counterparts and bulk materials. The enhanced coercivity is attributed to the combination of large magnetocrystalline anisotropy and ~ 50 nm size nanoparticles. The large coercivity is also replicated in the electrical properties through the anomalous Hall effect. The magnitude of the coercivity approaches that found in rare-earth magnets, making them attractive for rare-earth-free magnet applications.
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