Interface Engineered Room‐Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films

Authors

Weiwei Li, University of Cambridge
Bonan Zhu, University of Cambridge
Qian He, Cardiff University
Albina Y. Borisevich, Oak Ridge National Laboratory
Chao Yun, University of Cambridge
Rui Wu, University of Cambridge
Ping Lu, Sandia National Laboratory, Albuquerque, NM
Zhimin Qi, Purdue University
Qiang Wang, West Virginia University
Aiping Chen, Center for Integrated Nanotechnologies
Haiyan Wang, Purdue University
Stuart A. Cavill, University of York
Kelvin H.L. Zhang, Xiamen University
Judith L. MacManus-Driscoll, University of Cambridge

Document Type

Article

Publication Date

2019

Department/Program/Center

Physics and Astronomy

Abstract

emperatures near room temperature are critically needed for use in dissipationless quantum computation and spintronic devices. However, such materials are extremely rare. Here, a room‐temperature FMI is achieved in ultrathin La0.9Ba0.1MnO3 films grown on SrTiO3 substrates via an interface proximity effect. Detailed scanning transmission electron microscopy images clearly demonstrate that MnO6 octahedral rotations in La0.9Ba0.1MnO3 close to the interface are strongly suppressed. As determined from in situ X‐ray photoemission spectroscopy, O K‐edge X‐ray absorption spectroscopy, and density functional theory, the realization of the FMI state arises from a reduction of Mn eg bandwidth caused by the quenched MnO6 octahedral rotations. The emerging FMI state in La0.9Ba0.1MnO3 together with necessary coherent interface achieved with the perovskite substrate gives very high potential for future high performance electronic devices.

Digital Commons Citation

Li, Weiwei; Zhu, Bonan; He, Qian; Borisevich, Albina Y.; Yun, Chao; Wu, Rui; Lu, Ping; Qi, Zhimin; Wang, Qiang; Chen, Aiping; Wang, Haiyan; Cavill, Stuart A.; Zhang, Kelvin H.L.; and MacManus-Driscoll, Judith L., "Interface Engineered Room‐Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films" (2019). Faculty & Staff Scholarship. 1496.
https://researchrepository.wvu.edu/faculty_publications/1496

Source Citation

Li, W., Zhu, B., He, Q., Borisevich, A. Y., Yun, C., Wu, R., … MacManus‐Driscoll, J. L. (2019). Interface Engineered Room‐Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films. Advanced Science, 7(1), 1901606. https://doi.org/10.1002/advs.201901606

Comments

© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.