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arXiv · 2109.02062

Lateral modulation of magnetic anisotropy in tricolor 3d-5d oxide superlattices

Zengxing Lu·Jingwu Liu·Lijie Wen·Jiatai Feng·Shuai Kong·Xuan Zhen·Sheng Li·Peiheng Jiang·Zhicheng Zhong·Junfa Zhu·Xianfeng Hao·Zhiming Wang·Run-Wei Li
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Abstract

Manipulating magnetic anisotropy (MA) purposefully in transition metal oxides (TMOs) enables the development of oxide-based spintronic devices with practical applications. Here, we report a pathway to reversibly switch the lateral magnetic easy-axis via interfacial oxygen octahedral coupling (OOC) effects in 3d-5d tricolor superlattices, i.e. [SrIrO3,mRTiO3,SrIrO3,2La0.67Sr0.33MnO3]10 (RTiO3: SrTiO3 and CaTiO3). In the heterostructures, the anisotropy energy (MAE) is enhanced over one magnitude to ~106 erg/cm3 compared to La0.67Sr0.33MnO3 films. Moreover, the magnetic easy-axis is reversibly reoriented between (100)- and (110)-directions by changing the RTiO3. Using first-principles density functional theory calculations, we find that the SrIrO3 owns a large single-ion anisotropy due to its strong spin-orbit interaction. This anisotropy can be reversibly controlled by the OOC, then reorient the easy-axis of the superlattices. Additionally, it enlarges the MAE of the films via the cooperation with a robust orbital hybridization between the Ir and Mn atoms. Our results indicate that the tricolor superlattices consisting of 3d and 5d oxides provide a powerful platform to study the MA and develop oxide-based spintronic devices.

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Zengxing Lu, Jingwu Liu, Lijie Wen, Jiatai Feng, Shuai Kong, Xuan Zhen, Sheng Li, Peiheng Jiang, Zhicheng Zhong, Junfa Zhu, Xianfeng Hao, Zhiming Wang, Run-Wei Li. 2021-09-05. Lateral modulation of magnetic anisotropy in tricolor 3d-5d oxide superlattices. https://doi.org/10.1021/acsaelm.1c00658

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