Tuning Irreversible Magnetoresistance in Pr0.67Sr0.33MnO3 Film via Octahedral Rotation
Tuning Irreversible Magnetoresistance in Pr0.67Sr0.33MnO3 Film via Octahedral Rotation
复制标题
通过八面体旋转调节 Pr0.67Sr0.33MnO3 薄膜中的不可逆磁阻
DOI：
10.1021/acsami.0c10402
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发表时间：
2020
影响因子：
9.5
通讯作者：
Gan Moog Chow
中科院分区：
文献类型：
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作者：
Bangmin Zhang;Lijun Wu;Xin Feng;Chun Li;Xinyang Miao;Yajuan Hui;Kun Zhao;Jun Ding;Biaobing Jin;Han Wang;Yimei Zhu;Cheng-Jun Sun;Gan Moog Chow
探讨了氧八面体绕面外轴旋转对锰中磁团玻璃亚稳状态的影响。SrTiO3的面外轴（TiO6a0a0c-）的反相旋转增强了（001）SrTiO3衬底上12 nm Pr0.67Sr0.33MnO3薄膜的面内和面外方向的Mn-O键各向异性，减弱了铁磁相互作用，共同促进了磁性团簇-玻璃性的形成，增强了电荷载体弛豫时间，扩大了不可逆磁电阻（MR）效应。SrTiO3衬底中TiO6a0a0c-对材料性能的影响是明显的，薄膜具有较大的不可逆MR效应，随着薄膜厚度的增加，该效应逐渐消失。在10 K时，12 nm膜的不可逆磁流变率为0.91,30 nm膜的不可逆磁流变率为0.22。这项工作将目前对界面耦合的理解扩展到亚稳态状态，并有助于探索具有八面体旋转的钙钛矿结构中的其他系统。
The oxygen octahedral rotation around the out-of-plane axis is explored to study its effect on metastable status, magnetic cluster glass in manganite. The antiphase rotation around the out-of-plane axis (TiO6a0a0c-) of SrTiO3 enhances the Mn-O bond anisotropy along in-plane and out-of-plane directions and weakens the ferromagnetic interactions in a 12 nm Pr0.67Sr0.33MnO3 film on the (001) SrTiO3 substrate, which together promote the formation of magnetic cluster-glassiness and enlarges the irreversible magnetoresistance (MR) effect with enhanced relaxation time of charge carriers. The effect of TiO6a0a0c- in the SrTiO3 substrate on material properties is obvious with a large irreversible MR effect for thin films, which fades away with the increase in film thickness. At 10 K, the irreversible MR is 0.91 for the 12 nm film and 0.22 for the 30 nm film. This work extends current understanding on interfacial coupling to metastable status and could help explore other systems in the perovskite structure with octahedral rotation.