Twisted Integration of Complex Oxide Magnetoelectric Heterostructures via Water‑Etching and Transfer Process  

作　　者：Guannan Yang Guohua Dong Butong Zhang Xu Xu Yanan Zhao Zhongqiang Hu Ming Liu 

机构地区：[1]State Key Laboratory for Manufacturing Systems Engineering,Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education,Engineering Research Center of Spin Quantum Sensor Chips,Universities of Shaanxi Province,School of Electronic Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第1期360-369,共10页纳微快报（英文版）

基　　金：supported by the National Key Research and Development Program of China (Grant No. 2021YFB3201800);Natural Science Foundation of China (Grant Nos. U22A2019, 91964109, 52372123);State Key Laboratory for Mechanical Behavior of Materials (No. 20222405);Innovation Capability Support Program of Shaanxi (Grant No. 2021TD-12);National 111 Project of China (B14040);support from the Instrumental Analysis Center of Xi’an Jiaotong University

摘　　要：Manipulating strain mode and degree that can be applied to epitaxial complex oxide thin films have been a cornerstone of strain engineering.In recent years,lift-off and transfer technology of the epitaxial oxide thin films have been developed that enabled the integration of heterostructures without the limitation of material types and crystal orientations.Moreover,twisted integration would provide a more interesting strategy in artificial magnetoelectric heterostructures.A specific twist angle between the ferroelectric and ferromagnetic oxide layers corresponds to the distinct strain regulation modes in the magnetoelectric coupling process,which could provide some insight in to the physical phenomena.In this work,the La_(0.67)Sr_(0.33)MnO_(3)(001)/0.7Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.3PbTiO_(3)(011)(LSMO/PMN-PT)heterostructures with 45.and 0.twist angles were assembled via water-etching and transfer process.The transferred LSMO films exhibit a fourfold magnetic anisotropy with easy axis along LSMO<110>.A coexistence of uniaxial and fourfold magnetic anisotropy with LSMO[110]easy axis is observed for the 45°Sample by applying a 7.2 kV cm^(−1)electrical field,significantly different from a uniaxial anisotropy with LSMO[100]easy axis for the 0°Sample.The fitting of the ferromagnetic resonance field reveals that the strain coupling generated by the 45°twist angle causes different lattice distortion of LSMO,thereby enhancing both the fourfold and uniaxial anisotropy.This work confirms the twisting degrees of freedom for magnetoelectric coupling and opens opportunities for fabricating artificial magnetoelectric heterostructures.

关 键 词：Magnetoelectric heterostructures Twist angle Epitaxial lift-off Magnetic anisotropy Ferromagnetic resonance 

分 类 号：O48[理学—固体物理]