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Lateral strain tailoring in manganite homostructures assisted by atomic-flat freestanding membranes

Nano Research 2023年第5期16卷 7829-7836页

作者： Yufei Wang Yuchen Zhu Shengru Chen Dongke Rong Qiao Jin Er-Jia Guo College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China Department of Physics&Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Complex oxide thin films exhibit intriguing phenomena due to the coupling between multiple degrees of freedom through interfacial structural *** tailoring of structural parameters determines unique band structure and phonon modes,regulating emergent magnetic and electrical properties of oxide ***,the construction of different strained and oriented domains in one intact oxide thin film is impossible using conventional *** we report the fabrication and quantitative structural analysis of La_(0.7)Sr_(0.3)MnO_(3)(LSMO)homostructures assisted by atomic-flat freestanding *** substrates and suspended membranes regulate the epitaxial strain and orientation of subsequently grown *** results demonstrate an ultrathin transition layer(~4 atomic layers)between freestanding membranes and LSMO films is formed due to the strain *** work offers a simple and scalable methodology for fabricating unprecedented innovative functional oxide homostructures through artificially controlled synthesis routes.

关键词： transmission electron microscopy oxide homostructure freestanding membranes manganites strain engineering

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Enhanced ferromagnetism and conductivity of ultrathin freestanding La_(0.7)Sr_(0.3)MnO_(3)membranes

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Chinese Physics B 2023年第10期32卷 630-634页

作者：单思齐陈业全陈勇达庄文卓刘汝新张旭张荣王学锋 Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and Engineeringand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

We report a universal method to transfer freestanding La_(0.7)Sr_(0.3)MnO_(3)membranes to target *** 4-unit-cell-thick freestanding La_(0.7)Sr_(0.3)MnO_(3)membrane exhibits the enhanced ferromagnetism,conductivity and out-of-plane magnetic anisotropy,which otherwise shows nonmagnetic/antiferromagnetic and insulating behavior due to the intrinsic epitaxial *** work facilitates the promising applications of ultrathin freestanding correlated oxide membranes in electronics and spintronics.

关键词： freestanding membranes La_(0.7)Sr_(0.3)MnO_(3) ferromagnetism magnetic anisotropy

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