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arXiv 1111.4255cond-mat.mtrl-scicond-mat.mes-hall
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Fe3O4 Verwey跃迁引起的交换偏置

Exchange Bias Induced by the Fe3O4 Verwey transition

J. de la Venta, M. Erekhinsky, Siming Wang, K. G. West, R. Morales, Ivan K. Schuller

摘要:

本文研究了不同结构的具有铁磁层的V_2O_3薄膜的交换偏置。交换偏置伴随着磁化的大的垂直偏移。只有当V2O3生长在Ni80Fe20坡莫合金的顶部时才观察到这些效应。垂直位移的幅度高达总磁化强度的60%,这在任何系统中都没有报道过。X射线衍射研究表明,生长条件促进亚铁磁性Fe3O4中间层的形成。Fe3O4在120 K的Verwey转变的易磁化轴的变化与交换偏置和磁化垂直位移的出现相关。这两种现象消失以上120 K,第一次表明之间的直接关系的磁签名的Verwey过渡和交换偏置。

英文摘要:

We present a study of the exchange bias in different configurations of V2O3 thin films with ferromagnetic layers. The exchange bias is accompanied by a large vertical shift in the magnetization. These effects are only observed when V2O3 is grown on top of Ni80Fe20 permalloy. The magnitude of the vertical shift is as large as 60% of the total magnetization which has never been reported in any system. X-Ray diffraction studies show that the growth conditions promote the formation of a ferrimagnetic Fe3O4 interlayer. The change in the easy magnetization axis of Fe3O4 across the Verwey transition at 120 K is correlated with the appearance of exchange bias and vertical shift in magnetization. Both phenomena disappear above 120 K, indicating for the first time a direct relationship between the magnetic signature of the Verwey transition and exchange bias.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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