Concurrent magnetic and structural reconstructions at the interface of (111)-oriented La0.7Sr0.3MnO3/LaFeO3
Concurrent magnetic and structural reconstructions at the interface of (111)-oriented La0.7Sr0.3MnO3/LaFeO3
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DOI：
10.1103/physrevb.94.201115
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发表时间：
2016-11
影响因子：
3.7
通讯作者：
I. Hallsteinsen;M. Moreau;A. Grutter;M. Nord;P. Vullum;D. Gilbert;T. Bolstad;J. Grepstad;R. Holmestad;S. Selbach;A. N’Diaye;B. Kirby;E. Arenholz;T. Tybell
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作者：
I. Hallsteinsen;M. Moreau;A. Grutter;M. Nord;P. Vullum;D. Gilbert;T. Bolstad;J. Grepstad;R. Holmestad;S. Selbach;A. N’Diaye;B. Kirby;E. Arenholz;T. Tybell
作者：Hallsteinsen， I；男人味儿,M;格拉特案的裁决,;北方,M;Vullum、PE;吉尔伯特,DA;Bolstad T;Grepstad JK;Holmestad R;Selbach SM;恩迪亚耶,;科比,BJ;Arenholz E;摘要：©2016美国物理学会。我们观察到名义上的反铁磁LaFeO3的诱导可切换磁矩为1.6±0.40μB/Fe，将两到四个界面层扩展到无电荷转移体系La0.7Sr0.3MnO3/LaFeO3/SrTiO3（111）。同时，氧八面体在界面上的旋转不匹配意味着界面上对称性降低的原子重建，在LaFeO3中达到2到5层。具有原子重构和不同相关强度的结构的密度泛函理论表明，在界面处具有净铁矩的铁磁态。总之，这些结果表明，工程氧八面体旋转，影响局部对称性，影响电子相关性，并可用于提高磁性能。
Author(s): Hallsteinsen, I; Moreau, M; Grutter, A; Nord, M; Vullum, PE; Gilbert, DA; Bolstad, T; Grepstad, JK; Holmestad, R; Selbach, SM; N'Diaye, AT; Kirby, BJ; Arenholz, E; Tybell, T | Abstract: © 2016 American Physical Society. We observe an induced switchable magnetic moment of 1.6±0.40μB/Fe for the nominally antiferromagnetic LaFeO3 extending two to four interface layers into the non-charge transfer system La0.7Sr0.3MnO3/LaFeO3/SrTiO3(111). Simultaneously a mismatch of oxygen octahedra rotations at the interface implies an atomic reconstruction of reduced symmetry at the interface, reaching two to five layers into LaFeO3. Density functional theory of a structure with atomic reconstruction and different correlation strength shows a ferrimagnetic state with a net Fe moment at the interface. Together these results suggest that engineered oxygen octahedra rotations, affecting the local symmetry, affect electron correlations and can be used to promote magnetic properties.