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首页> 外文期刊>Bulletin of the American Physical Society >APS -APS March Meeting 2017 - Event - Magnetism and structure of a half-metallic Heusler compound Co-Mn-Cr-Si
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APS -APS March Meeting 2017 - Event - Magnetism and structure of a half-metallic Heusler compound Co-Mn-Cr-Si

机译：APS -APS 2017年3月会议-活动-半金属Heusler化合物Co-Mn-Cr-Si的磁性和结构

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Half metallic ferromagnetic Heusler compounds have a potential in the development of spintronic devices for its high spin polarization at the Fermi level and lattice structure compatibility. Heusler compounds based on cobalt are considered a good candidate for room temperature half-metals due to their high Curie temperature. Co$_{mathrm{2}}$CrSi is one of such predicted half-metal, but it is meta-stable and difficult to synthesize in the desired crystal structure. We have successfully synthesized a Heusler compound Co$_{mathrm{2}}$Mn$_{mathrm{0.5}}$Cr$_{mathrm{0.5}}$Si by using arc melting and rapid quenching followed by thermal treatment under high vacuum to control any parasitic contamination. Crystal X-ray diffraction pattern shows the samples crystallize in a cubic Heusler structure with some degrees of structural disorder. Curie temperatures of the prepared samples are observed well beyond room temperature near 900 K. Magnetic anomalies present in as-prepared samples are cleared, and its magnetic properties are improved by thermal treatment.
机译：半金属铁磁Heusler化合物因其在费米能级的高自旋极化和晶格结构相容性而在自旋电子器件的开发中具有潜力。基于钴的赫斯勒化合物因居里温度高而被认为是室温半金属的良好候选者。 Co $ _ {mathrm {2}} $ CrSi是这种预测的半金属之一，但它是亚稳态的，很难在所需的晶体结构中合成。我们已经成功地通过电弧熔化和快速淬火，然后在下列条件下进行热处理，成功合成了Heusler化合物Co $ _ {mathrm {2}} $ Mn $ _ {mathrm {0.5}} $ Cr $ _ {mathrm {0.5}} $ Si高真空度，可控制任何寄生污染。晶体X射线衍射图显示样品结晶为具有一定程度的结构无序的立方赫斯勒结构。观察到制得的样品的居里温度远高于室温，接近900K。清除了制得样品中的磁异常，并通过热处理改善了其磁性能。

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