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Li S, Li J, Wang Y, Yang M, Huo C, Xu S, Chen X, Li Q, Miao J, Guo EJ, Jin K, Gu L, Zhang Q, Lin T, Lin K, Huang L, Xing X. Stereointerface Structure Drives Ferroelectricity in BaZrO 3 Films. Inorg Chem 2024; 63:15098-15104. [PMID: 39072372 DOI: 10.1021/acs.inorgchem.4c02145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Interfacial strain engineering can induce structural transformation and introduce new physical properties into materials, which is an effective method to prepare new multifunctional materials. However, interfacial strain has a limited spatial impact size. For example, in 2D thin films, the critical thickness of biaxial strain is typically less than 20 nm, which is not conducive to the maintenance of a strained structure and properties in thick film materials. The construction of a 3D interface can solve this problem. The large lattice mismatch between the BaZrO3 thin film and the substrate can induce the out-of-phase boundary (OPB) structure, which can extend along the thickness direction with the stacking of atoms. The lattice distortion at the OPB structure can provide a clamping effect for each layer of atoms, thus expanding the spatial influence range of biaxial strain. As a result, the uniform in-plane strain distribution and strain-induced ferroelectricity (Pr = 13 μC/cm2) are maintained along the thickness direction in BaZrO3 films.
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Affiliation(s)
- Shan Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Jiaqi Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Yilin Wang
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Mingdi Yang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Chuanrui Huo
- Beijing Advanced Innovation Center for Materials Genome Engineering, Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Shuai Xu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xin Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Qiang Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Jun Miao
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Er-Jia Guo
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Kuijuan Jin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lin Gu
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Ting Lin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Kun Lin
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Ling Huang
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
- State Kay Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China
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Haselmann U, Haberfehlner G, Pei W, Popov MN, Romaner L, Knez D, Chen J, Ghasemi A, He Y, Kothleitner G, Zhang Z. Study on Ca Segregation toward an Epitaxial Interface between Bismuth Ferrite and Strontium Titanate. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12264-12274. [PMID: 32058684 PMCID: PMC7068718 DOI: 10.1021/acsami.9b20505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 02/14/2020] [Indexed: 06/10/2023]
Abstract
Segregation is a crucial phenomenon, which has to be considered in functional material design. Segregation processes in perovskite oxides have been the subject of ongoing scientific interest, since they can lead to a modification of properties and a loss of functionality. Many studies in oxide thin films have focused on segregation toward the surface using a variety of surface-sensitive analysis techniques. In contrast, here we report a Ca segregation toward an in-plane compressively strained heterostructure interface in a Ca- and Mn-codoped bismuth ferrite film. We are using advanced transmission electron microscopy techniques, X-ray photoelectron spectroscopy, and density functional theory (DFT) calculations. Ca segregation is found to trigger atomic and electronic structure changes at the interface. This includes the reduction of the interface strain according to the Ca concentration gradient, interplanar spacing variations, and oxygen vacancies at the interface. The experimental results are supported by DFT calculations, which explore two segregation scenarios, i.e., one without oxygen vacancies and Fe oxidation from 3+ to 4+ and one with vacancies for charge compensation. Comparison with electron energy loss spectroscopy (EELS) measurements confirms the second segregation scenario with vacancy formation. The findings contribute to the understanding of segregation and indicate promising effects of a Ca-rich buffer layer in this heterostructure system.
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Affiliation(s)
- Ulrich Haselmann
- Erich
Schmid Institute of Materials Science, Austrian
Academy of Sciences, Leoben 8700, Austria
| | - Georg Haberfehlner
- Institute
for Electron Microscopy and Nanoanalysis, Graz University of Technology, Graz 8010, Austria
| | - Weijie Pei
- School
of Materials Science & Engineering, Hubei University, Wuhan 430000, Hubei, China
| | - Maxim N. Popov
- Materials
Center Leoben Forschung GmbH, Leoben 8700, Austria
| | - Lorenz Romaner
- Materials
Center Leoben Forschung GmbH, Leoben 8700, Austria
| | - Daniel Knez
- Graz
Centre for Electron Microscopy, Graz 8010, Austria
| | - Jian Chen
- School
of Materials Science & Engineering, Hubei University, Wuhan 430000, Hubei, China
| | - Arsham Ghasemi
- Erich
Schmid Institute of Materials Science, Austrian
Academy of Sciences, Leoben 8700, Austria
| | - Yunbin He
- School
of Materials Science & Engineering, Hubei University, Wuhan 430000, Hubei, China
| | - Gerald Kothleitner
- Institute
for Electron Microscopy and Nanoanalysis, Graz University of Technology, Graz 8010, Austria
- Graz
Centre for Electron Microscopy, Graz 8010, Austria
| | - Zaoli Zhang
- Erich
Schmid Institute of Materials Science, Austrian
Academy of Sciences, Leoben 8700, Austria
- Institute
of Material Physics, Montanuniversität
Leoben, Leoben 8700, Austria
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Performing EELS at higher energy losses at both 80 and 200 kV. ADVANCES IN IMAGING AND ELECTRON PHYSICS 2019. [DOI: 10.1016/bs.aiep.2019.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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Wang Z, Guo H, Shao S, Saghayezhian M, Li J, Fittipaldi R, Vecchione A, Siwakoti P, Zhu Y, Zhang J, Plummer EW. Designing antiphase boundaries by atomic control of heterointerfaces. Proc Natl Acad Sci U S A 2018; 115:9485-9490. [PMID: 30104360 PMCID: PMC6156677 DOI: 10.1073/pnas.1808812115] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Extended defects are known to have critical influences in achieving desired material performance. However, the nature of extended defect generation is highly elusive due to the presence of multiple nucleation mechanisms with close energetics. A strategy to design extended defects in a simple and clean way is thus highly desirable to advance the understanding of their role, improve material quality, and serve as a unique playground to discover new phenomena. In this work, we report an approach to create planar extended defects-antiphase boundaries (APB) -with well-defined origins via the combination of advanced growth, atomic-resolved electron microscopy, first-principals calculations, and defect theory. In La2/3Sr1/3MnO3 thin film grown on Sr2RuO4 substrate, APBs in the film naturally nucleate at the step on the substrate/film interface. For a single step, the generated APBs tend to be nearly perpendicular to the interface and propragate toward the film surface. Interestingly, when two steps are close to each other, two corresponding APBs communicate and merge together, forming a unique triangle-shaped defect domain boundary. Such behavior has been ascribed, in general, to the minimization of the surface energy of the APB. Atomic-resolved electron microscopy shows that these APBs have an intriguing antipolar structure phase, thus having the potential as a general recipe to achieve ferroelectric-like domain walls for high-density nonvolatile memory.
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Affiliation(s)
- Zhen Wang
- Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803
- Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973
| | - Hangwen Guo
- Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803;
| | - Shuai Shao
- Department of Mechanical & Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803
| | - Mohammad Saghayezhian
- Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803
| | - Jun Li
- Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973
| | - Rosalba Fittipaldi
- Consiglio Nazionale Delle Ricerche-Superconducting and Other Innovative Materials and Devices Institute (SPIN), Dipartimento di Fisica, Università di Salerno, 132 - 84084 Fisciano, Italy
| | - Antonio Vecchione
- Consiglio Nazionale Delle Ricerche-Superconducting and Other Innovative Materials and Devices Institute (SPIN), Dipartimento di Fisica, Università di Salerno, 132 - 84084 Fisciano, Italy
| | - Prahald Siwakoti
- Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803
| | - Yimei Zhu
- Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973
| | - Jiandi Zhang
- Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803
| | - E W Plummer
- Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803;
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Xie L, Li L, Heikes CA, Zhang Y, Hong Z, Gao P, Nelson CT, Xue F, Kioupakis E, Chen L, Schlom DG, Wang P, Pan X. Giant Ferroelectric Polarization in Ultrathin Ferroelectrics via Boundary-Condition Engineering. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1701475. [PMID: 28585347 DOI: 10.1002/adma.201701475] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 04/20/2017] [Indexed: 06/07/2023]
Abstract
Tailoring and enhancing the functional properties of materials at reduced dimension is critical for continuous advancement of modern electronic devices. Here, the discovery of local surface induced giant spontaneous polarization in ultrathin BiFeO3 ferroelectric films is reported. Using aberration-corrected scanning transmission electron microscopy, it is found that the spontaneous polarization in a 2 nm-thick ultrathin BiFeO3 film is abnormally increased up to ≈90-100 µC cm-2 in the out-of-plane direction and a peculiar rumpled nanodomain structure with very large variation in c/a ratios, which is analogous to morphotropic phase boundaries (MPBs), is formed. By a combination of density functional theory and phase-field calculations, it is shown that it is the unique single atomic Bi2 O3-x layer at the surface that leads to the enhanced polarization and appearance of the MPB-like nanodomain structure. This finding clearly demonstrates a novel route to the enhanced functional properties in the material system with reduced dimension via engineering the surface boundary conditions.
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Affiliation(s)
- Lin Xie
- Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA, 92697, USA
- National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, P. R. China
| | - Linze Li
- Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA, 92697, USA
| | - Colin A Heikes
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Yi Zhang
- Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA, 92697, USA
| | - Zijian Hong
- Department of Materials Science and Engineering, Pennsylvania State University, State College, PA, 16802, USA
| | - Peng Gao
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48105, USA
| | - Christopher T Nelson
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48105, USA
| | - Fei Xue
- Department of Materials Science and Engineering, Pennsylvania State University, State College, PA, 16802, USA
| | - Emmanouil Kioupakis
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48105, USA
| | - Longqing Chen
- Department of Materials Science and Engineering, Pennsylvania State University, State College, PA, 16802, USA
| | - Darrel G Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Peng Wang
- National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, P. R. China
| | - Xiaoqing Pan
- Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA, 92697, USA
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