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Magnetotransport properties of Fe_(48)Mn_(24)Ga_(28) Heusler alloys

机译：Fe_（48）Mn_（24）Ga_（28）Heusler合金的磁输运性质

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摘要

Magnetotransport properties of an Fe_(48)Mn_(24)Ga_(28) Heusler-based ferromagnetic shape memory alloy are tracked in a temperature interval that covers both martensitic and austenitic phases. A large temperature hysteresis indicative of a coupled magnetostructural transition from ferromagnetic martensite to paramagnetic austenite is observed on the temperature dependencies of magnetization and electrical resistivity. The temperature dependency of the anomalous Hall-effect coefficient in Fe_(48)Mn_(24)Ga_(28) cannot be described in terms of skew scattering, side-jump, and intrinsic mechanisms of the anomalous Hall-effect theory. The Hall-effect resistivity in the martensitic state is smaller, but is of the same order of magnitude as in the case of the giant Hall effect in a half-metallic Co_2MnAl. Specific features of the temperature dependencies of magnetization, resistivity, magnetoresistance, and ordinary and anomalous Hall-effect coefficients are discussed and the possible routes for increasing Hall-effect resistivity are suggested.
机译：Fe_（48）Mn_（24）Ga_（28）Heusler基铁磁形状记忆合金的磁输运性质在覆盖马氏体和奥氏体相的温度区间内进行跟踪。在磁化强度和电阻率的温度相关性上，观察到较大的温度滞后现象，表明从铁磁性马氏体到顺磁性奥氏体的耦合磁结构转变。 Fe_（48）Mn_（24）Ga_（28）中反常霍尔效应系数的温度依赖性无法用反常散射，侧跳和反常霍尔效应理论的内在机理来描述。马氏体状态下的霍尔效应电阻率较小，但与半金属Co_2MnAl中的巨大霍尔效应的情况具有相同的数量级。讨论了磁化强度，电阻率，磁阻以及普通和异常霍尔效应系数与温度的关系的具体特征，并提出了增加霍尔效应电阻率的可能途径。

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  • 来源
    《Physical review》 |2013年第17期|215-219|共5页
  • 作者

    V. V. Khovaylo; T. Omori; K. Endo; X. Xu; R. Kainuma; A. P. Kazakov; V. N. Prudnikov; E. A. Ganshina; A. I. Novikov; Yu. O. Mikhailovsky; D. E. Mettus; A. B. Granovsky;

  • 作者单位

    National University of Science and Technology 'MISiS' Moscow 119049, Russia;

    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;

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

    Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia;

    Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia;

    Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia;

    Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia;

    Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia;

    Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia;

    Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    metals and alloys; galvanomagnetic and other magnetotransport effects;

    机译：金属和合金;电磁和其他磁传输效应;

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