ACS applied materials & interfaces · 2023
Highly Energy-Efficient Spin Current Generation in SrIrO3 by Manipulating the Octahedral Rotation.
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Zhang Qihan, Shi Shu, Zheng Zhenyi, Zhou Hengan, Shao Ding-Fu, Zhao Tieyang, Su Hanxin, Liu Liang, Shu Xinyu, Jia Lanxin, Gu Youdi, Xiao Rui, Wang Guilei, Zhao Chao, Li Huihui, Chen Jingsheng
Аннотация
Materials with strong spin-orbit coupling (SOC) have been continuously attracting intensive attention due to their promising application in energy-efficient, high-density, and nonvolatile spintronic devices. Particularly, transition-metal perovskite oxides with strong SOC have been demonstrated to exhibit efficient charge-spin interconversion. In this study, we systematically investigated the impact of epitaxial strain on the spin-orbit torque (SOT) efficiency in the SrIrO3(SIO)/Ni81Fe19(Py) bilayer. The results reveal that the SOT efficiency is strongly related to the octahedral rotation around the in-plane axes of the single-crystal SIO. By modulating the epitaxial strain using different substrates, the SOT efficiency can be remarkably improved from 0.15 to 1.45. This 10-fold enhancement of SOT efficiency suggests that modulating the epitaxial strain is an efficient approach to control the SOT efficiency in complex oxide-based heterostructures. Our work may have the potential to advance the application of complex oxides in energy-efficient spintronic devices.