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首页> 外文期刊>Physical review >Magnetic properties of the half-metallic Heusler alloys Co_2VAl and Co_2VGa under pressure
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Magnetic properties of the half-metallic Heusler alloys Co_2VAl and Co_2VGa under pressure

机译:半金属Heusler合金Co_2VAl和Co_2VGa在压力下的磁性能

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摘要

Magnetization measurements have been carried out at high pressure up to 12.1 kbar for Co_2VAl and Co_2VGa with a miniature high-pressure clamp cell. The magnetic moment measured at 5 K is independent of pressure for Co_2VGa. This is an experimental observation that gives clear evidence that Co_2VGa possesses half-metallic electronic structure. On the other hand, a sizable pressure dependence of the magnetic moment is observed for Co_2VAl and it is attributed to the precipitation of the bcc particles in the matrix L2_1 phase. The Curie temperature decreases with increasing pressure for Co_2VGa, reflecting characteristics typical for usual itinerant electron systems. The negative pressure dependence of the Curie temperature found in Co_2VGa contrasts fairly with that of other Heusler alloys containing Mn atoms.
机译:对于Co_2VAl和Co_2VGa,已经使用微型高压钳形单元在高达12.1 kbar的高压下进行了磁化测量。在5 K下测得的磁矩与Co_2VGa的压力无关。这是一个实验观察结果,清楚地证明了Co_2VGa具有半金属电子结构。另一方面,对于Co_2VA1,观察到了磁矩对压力的相当大的压力依赖性,这归因于bcc颗粒在基质L2_1相中的沉淀。居里温度随着Co_2VGa压力的增加而降低,反映了通常的迭代电子系统的典型特性。 Co_2VGa中居里温度的负压依赖性与其他含Mn原子的Heusler合金的负压相当。

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  • 来源
    《Physical review》 |2010年第14期|p.144415.1-144415.7|共7页
  • 作者单位

    Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan;

    Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan;

    Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan;

    Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan;

    Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan;

    Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan;

    Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan;

    Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

    Department of Physics, College of Humanities and Sciences, Nihon University, Tokyo 156-8550, Japan;

    Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan;

    Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan;

    Research Institute of Electrical Communication (RIEC), Center for Spintronics Integration Systems (CSIS), Tohoku University,Sendai 980-8577, Japan;

    Research Institute of Electrical Communication (RIEC), Center for Spintronics Integration Systems (CSIS), Tohoku University,Sendai 980-8577, Japan;

    Research Institute of Electrical Communication (RIEC), Center for Spintronics Integration Systems (CSIS), Tohoku University,Sendai 980-8577, Japan;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    transition metals and alloys; saturation moments and magnetic susceptibilities;

    机译:过渡金属和合金;饱和力矩和磁化率;

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