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首页> 外文期刊>Journal of Applied Physics >Unusual anisotropic magnetoresistance in charge-orbital ordered Nd0.5Sr0.5MnO3 polycrystals
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Unusual anisotropic magnetoresistance in charge-orbital ordered Nd0.5Sr0.5MnO3 polycrystals

机译：电荷轨道有序Nd 0.5 Sr 0.5 MnO 3 多晶中的各向异性磁阻

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摘要

Due to its potential application in magnetic recording and sensing technologies, the anisotropic magnetoresistance (AMR) effect has attracted lasting attention. Despite the long history, AMR effect has not been fully understood especially in the unconventional materials, such as perovskite manganites. Here, we report an unusual AMR effect in the charge-orbital ordered (COO) NdSrMnO polycrystals, which is observed when the magnetic field rotates in the plane that is perpendicular to the current (out-of-plane AMR). Despite being a polycrystalline sample where no anisotropy is expected, the resistivity shows a large irreversible drop with rotating magnetic field. A model has been proposed based on anisotropic magnetic field induced the melting of COO phase to explain the unusual out-of-plane AMR successfully. Our results demonstrate a new way for understanding the close relationship between phase separation and AMR effect in COO manganites.
机译：由于其在磁记录和传感技术中的潜在应用，各向异性磁阻（AMR）效应引起了长期关注。尽管历史悠久，但对AMR的效果尚未完全了解，尤其是在非常规材料（例如钙钛矿锰矿）中。在这里，我们报告了电荷轨道有序（COO）NdSrMnO多晶体中的异常AMR效应，当磁场在垂直于电流的平面中旋转时（平面外AMR）观察到这种现象。尽管是没有各向异性的多晶样品，但电阻率随旋转磁场显示出较大的不可逆下降。提出了一种基于各向异性磁场引起COO相熔化的模型，成功地解释了异常面外AMR。我们的结果证明了一种理解COO锰矿中相分离与AMR效应之间密切关系的新方法。

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