Atomic-scale observation of strain-dependent reversible topotactic transition in La0.7Sr0.3MnOx films under an ultra-high vacuum environment

Hu, Kejun; Zhang, Xinyu; Chen, Pingfan; Lin, Renju; Zhu, Jinlong; Huang, Zhen; Du, Haifeng; Song, Dongsheng; Ge, Binghui

doi:10.1016/j.mtphys.2022.100922

Cited by 8 publications

(9 citation statements)

References 51 publications

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“…The work carried by Hu et al used the scanning transmission electron microscopy with in situ heating capability to observe the structural evolution of the LaSrMnO x (LSMO) thin film during annealing in high vacuum (10 −9 Torr) at 500 °C under different strain states. [ 44 ] A fully transition from PV‐LSMO to BM‐LSMO has been detected and interestingly, the whole process is proved to be reversible. However, the oxygen diffusion process and the related topotactic transition is strongly strain dependent ( Figure ).…”

Section: Mechanism Of Oxygen‐related Topotactic Transitionmentioning

confidence: 99%

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Topotactic Transition: A Promising Opportunity for Creating New Oxides

Meng

Yan

Qin

et al. 2023

Adv Funct Materials

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Topotactic transition is a structural phase change in a matrix crystal lattice mediated by the ordered loss/gain and rearrangement of atoms, leading to unusual coordination environments and metal atoms with rare valent states. As early as in 1990s, low temperature hydride reduction is utilized to realize the topotactic transition. Since then, topological transformations are developed via multiple approaches. Especially, the recent discovery of the Ni‐based superconductivity in infinite‐layer nickelates has greatly boosted the topotactic transition mean to synthesizing new oxides for exploring exotic functional properties. In this review, a detailed and generalized introduction is provided to oxygen‐related topotactic transition. The main body of the review includes four parts: the structure‐facilitated effects, the mechanism of the topotactic transition, some examples of topotactic transition methods adopted in different metal oxides (V, Mn, Fe, Co, Ni) and the related applications. This study is to provide timely and thorough strategies to successfully realize topotactic transitions for researchers who are eager to create new oxide phases or new oxide materials with desired functions.

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Section: Mechanism Of Oxygen‐related Topotactic Transitionmentioning

confidence: 99%

mentioning

confidence: 99%

Topotactic Transition: A Promising Opportunity for Creating New Oxides

Meng

Yan

Qin

et al. 2023

Adv Funct Materials

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“…Multiple methods have been proposed for controlling the orientation of OVCs in various BM-structured oxide thin films. For the La 1– x Sr x MnO 3 system, the control of the OVCs' orientation has been realized by electrothermal oxygen vacancy migration, annealing P-phase in a vacuum, and the strain . For BM-SrCoO 2.5 (SCO), it is commonly believed that the OVCs tend to form in the vertical planes (vertical OVCs) when grown on substrates that offer tensile biaxial strains, while parallel to the horizontal planes (horizontal OVCs) upon compressive strains. , Many other methods including electric field, proton-induced filling, and noble-metal-assisted fast interfacial oxygen migration , have also been utilized to control the OVCs in BM-SCO.…”

Section: Introductionmentioning

confidence: 99%

Orienting Oxygen Vacancy Channels in Brownmillerite Strontium Ferrite Thin Films Using Strain: Implications for Facile Oxygen Ion Transport

Yan,

Wu,

Ning

et al. 2024

ACS Appl. Nano Mater.

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The control of oxygen vacancy channels (OVCs) in brownmillerite (BM) oxides has a substantial impact on tuning their physical and chemical properties. Here, we demonstrated a strain mechanism for directing the OVCs in BM-SrFeO 2.5 (SFO) synthesized via a two-step process in which perovskite (P)-structured SrFeO 3−δ (P-SFO 3−δ ) thin film is first prepared and then converted to the BM phase through the post-vacuum-annealing (PVA) treatment. The initial strain state for the first-step-prepared P-SFO 3−δ thin films plays a determining role in the orientation of the OVCs of the final BM phase with the systematic manipulation of both chemical strain (lattice expansion) and epitaxial strain by tuning the oxygen deficiency and using different substrates, respectively. Larger tensile strains in the initial P-SFO 3−δ thin films are inclined to facilitate the formation of BM with horizontal OVCs after PVA, while small tensile or compressive strains favor the vertical OVCs. Our results offer insights into the selective control of the orientation of the OVCs of BM-SrFeO 2.5 thin films, which are of benefit to the design for functionalities related to the ion transport and migration.

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“…36,37 In addition, LSMO exhibits a higher affinity for oxygen compared to other TPT materials, which makes the non-oxygen fully stoichiometric high-resistance structure of La 0.7 Sr 0.3 MnO 3Àd , prone to oxygen absorption and transformation into a fully oxidized conductive perovskite structure of La 0.7 Sr 0.3 MnO 3 . 38 This characteristic suggests that LSMO possesses the potential of replacing SRO as the bottom electrode in TPT memristors. At present, there are few studies on TPT memristors with LSMO as the bottom electrode.…”

Section: Introductionmentioning

confidence: 99%

Improved cycling stability and ON/OFF ratio of SrFeO_x topological phase transition memristors using a La_0.7Sr_0.3MnO₃ bottom electrode

Zhang,

Su,

Xiao

et al. 2024

J. Mater. Chem. C

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Atomic-scale observation of strain-dependent reversible topotactic transition in La0.7Sr0.3MnOx films under an ultra-high vacuum environment

Cited by 8 publications

References 51 publications

Topotactic Transition: A Promising Opportunity for Creating New Oxides

Topotactic Transition: A Promising Opportunity for Creating New Oxides

Orienting Oxygen Vacancy Channels in Brownmillerite Strontium Ferrite Thin Films Using Strain: Implications for Facile Oxygen Ion Transport

Improved cycling stability and ON/OFF ratio of SrFeO_x topological phase transition memristors using a La_0.7Sr_0.3MnO₃ bottom electrode

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Atomic-scale observation of strain-dependent reversible topotactic transition in La0.7Sr0.3MnOx films under an ultra-high vacuum environment

Cited by 8 publications

References 51 publications

Topotactic Transition: A Promising Opportunity for Creating New Oxides

Topotactic Transition: A Promising Opportunity for Creating New Oxides

Orienting Oxygen Vacancy Channels in Brownmillerite Strontium Ferrite Thin Films Using Strain: Implications for Facile Oxygen Ion Transport

Improved cycling stability and ON/OFF ratio of SrFeOx topological phase transition memristors using a La0.7Sr0.3MnO3 bottom electrode

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Improved cycling stability and ON/OFF ratio of SrFeO_x topological phase transition memristors using a La_0.7Sr_0.3MnO₃ bottom electrode