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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Magnetoresistance in magnetite: Switching of the magnetic easy axis
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Magnetoresistance in magnetite: Switching of the magnetic easy axis

机译：磁铁矿中的磁阻：易磁化轴的切换

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摘要

The influence of the external magnetic field B (B < - 4 T) on resistivity in magnetite single crystal was studied at few temperatures both below and above the Verwey transition temperature T_V, and in two <100> type cubic directions. We have succeeded to confirm our predictions that the magnetic axis switching affects electronic transport. It was also found that the transverse resistivity (B perpendicular current direction) exceeds longitudinal one, but only for T>T_V, with no obvious systematics below the transition temperature. This may indicate that atomic disorder, inherent and poorly defined in a material with structural domains, is the primary factor that governs transport properties below the transition temperature. Finally, and concomitant with the last statement, only very small magnetic field dependence in magnetite below T_V may be inferred from our data.
机译：研究了在低于和高于Verwey转变温度T_V的几个温度以及两个<100>立方方向上，外部磁场B（B <-4 T）对磁铁矿单晶电阻率的影响。我们已经成功证实了关于磁轴切换会影响电子传输的预测。还发现横向电阻率（B垂直电流方向）超过了纵向电阻率，但仅在T> T_V时有效，在转变温度以下没有明显的系统性。这可能表明，在具有结构域的材料中固有的，定义不明确的原子无序是控制低于转变温度的传输特性的主要因素。最后，根据最后的陈述，从我们的数据中只能推断出T_V以下磁铁矿中很小的磁场依存性。

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