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Choo S, Varshney S, Liu H, Sharma S, James RD, Jalan B. From oxide epitaxy to freestanding membranes: Opportunities and challenges. SCIENCE ADVANCES 2024; 10:eadq8561. [PMID: 39661695 PMCID: PMC11633760 DOI: 10.1126/sciadv.adq8561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Accepted: 11/04/2024] [Indexed: 12/13/2024]
Abstract
Motivated by the growing demand to integrate functional oxides with dissimilar materials, numerous studies have been undertaken to detach a functional oxide film from its original substrate, effectively forming a membrane, which can then be affixed to the desired host material. This review article is centered on the synthesis of functional oxide membranes, encompassing various approaches to their synthesis, exfoliation, and transfer techniques. First, we explore the characteristics of thin-film growth techniques with emphasis on molecular beam epitaxy. We then examine the fundamental principles and pivotal factors underlying three key approaches of creating membranes: (i) chemical lift-off, (ii) the two-dimensional layer-assisted lift-off, and (iii) spalling. We review the methods of exfoliation and transfer for each approach. Last, we provide an outlook into the future of oxide membranes, highlighting their applications and emerging properties.
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Affiliation(s)
- Sooho Choo
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
| | - Shivasheesh Varshney
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
| | - Huan Liu
- Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Shivam Sharma
- Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Richard D. James
- Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Bharat Jalan
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
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Guo J, He B, Han Y, Liu H, Han J, Ma X, Wang J, Gao W, Lü W. Resurrected and Tunable Conductivity and Ferromagnetism in the Secondary Growth La 0.7Ca 0.3MnO 3 on Transferred SrTiO 3 Membranes. NANO LETTERS 2024; 24:1114-1121. [PMID: 38252877 DOI: 10.1021/acs.nanolett.3c03651] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
To avoid the epitaxy dilemma in various thin films, such as complex oxide, silicon, organic, metal/alloy, etc., their stacking at an atomic level and secondary growth are highly desired to maximize the functionality of a promising electronic device. The ceramic nature of complex oxides and the demand for accurate and long-range-ordered stoichiometry face severe challenges. Here, the transport and magnetic properties of the La0.7Ca0.3MnO3 (LCMO) secondary growth on single-crystal freestanding SrTiO3 (STO) membranes are demonstrated. It has been experimentally found that on an only 10 nm thick STO membrane, the LCMO can offer a bulk-like Curie temperature (TC) of 253 K and negative magnetoresistance of -64%, with a weak dependence on the thickness. The resurrected conductivity and ferromagnetism in LCMO confirm the advantages of secondary growth, which benefits from the excellent flexibility and transferability. Additionally, this study explores the integration strategy of complex oxides with other functional materials.
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Affiliation(s)
- Jinrui Guo
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
| | - Bin He
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
| | - Yue Han
- Country Functional Materials and Acousto-Optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Huan Liu
- Country Functional Materials and Acousto-Optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Jiale Han
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
| | - Xiaoqiao Ma
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
| | - Jiaqing Wang
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
| | - Wenqi Gao
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
| | - Weiming Lü
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
- Country Functional Materials and Acousto-Optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
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