Comparison of topotactic and magnetic structures for manganite oxide films

Yukuai Liu; Sixia Hu; Boyang Zhao; Xinrong Shi; Xiezong Zeng; Chi Wah Leung; Chuanwei Huang

doi:10.1016/j.ceramint.2022.01.118

Comparison of topotactic and magnetic structures for manganite oxide films

Yukuai Liu, Sixia Hu, Boyang Zhao, Xinrong Shi, Xiezong Zeng, Chi Wah Leung, Chuanwei Huang

Research output: Journal article publication › Journal article › Academic research › peer-review

2 Citations (Scopus)

Abstract

Deliberate manipulation of topotactic transformation via oxygen insertion/extraction offers a feasible way to precisely tune oxygen concentration, B–O coordination occupation and resultant electronic functionalities of perovskite (ABO₃)-based oxides. Herein, two methods, a post-annealing CaH₂ treatment and an in-situ oxygen-vacancy diffusion using oxygen getter layer, were conducted to achieve topotactic transitions from perovskite to brownmillerite of La_0·7Sr_0·3MnO_3-δ (LSMO, 0 ≤ δ ≤ 0.5) films. The results revealed that delicate control of oxygen composition is the crucial factor for evolutions of crystalline structure and subsequent magnetic properties of LSMO films. In particular, the brownmillerite LSMO film treated by the in-situ oxygen getter layer possesses desirable structural stability over time. In contrast, the topotactic LSMO films using reduction agents CaH₂ exhibit compositional and structural inhomogeneities. These findings suggest that adjustable topotactic transformation through anionic oxygen provides a facile strategy for designing multifunctional perovskite-derivative oxide materials.

Original language	English
Pages (from-to)	12515-12519
Number of pages	5
Journal	Ceramics International
Volume	48
Issue number	9
DOIs	https://doi.org/10.1016/j.ceramint.2022.01.118
Publication status	Published - 1 May 2022

Keywords

Brownmillerite
Magnetic insulator
Manganite oxide film
Pulsed laser deposition

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2022.01.118

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title = "Comparison of topotactic and magnetic structures for manganite oxide films",

abstract = "Deliberate manipulation of topotactic transformation via oxygen insertion/extraction offers a feasible way to precisely tune oxygen concentration, B–O coordination occupation and resultant electronic functionalities of perovskite (ABO3)-based oxides. Herein, two methods, a post-annealing CaH2 treatment and an in-situ oxygen-vacancy diffusion using oxygen getter layer, were conducted to achieve topotactic transitions from perovskite to brownmillerite of La0·7Sr0·3MnO3-δ (LSMO, 0 ≤ δ ≤ 0.5) films. The results revealed that delicate control of oxygen composition is the crucial factor for evolutions of crystalline structure and subsequent magnetic properties of LSMO films. In particular, the brownmillerite LSMO film treated by the in-situ oxygen getter layer possesses desirable structural stability over time. In contrast, the topotactic LSMO films using reduction agents CaH2 exhibit compositional and structural inhomogeneities. These findings suggest that adjustable topotactic transformation through anionic oxygen provides a facile strategy for designing multifunctional perovskite-derivative oxide materials.",

keywords = "Brownmillerite, Magnetic insulator, Manganite oxide film, Pulsed laser deposition",

author = "Yukuai Liu and Sixia Hu and Boyang Zhao and Xinrong Shi and Xiezong Zeng and Leung, {Chi Wah} and Chuanwei Huang",

note = "Funding Information: C.W. H. gratefully acknowledges the Guangdong Basic and Applied Basic Research Foundation ( 2019A1515011529 ) and the support from Hubei Key Laboratory of Polymer Materials , Hubei University . X.R.S thanks the Science and Technology Project of Guangdong Market Supervision Bureau ( 2021ZJ04 ). Y.K.L thanks the Research Fund of Zhao Qing University ( 2021011832 ). Publisher Copyright: {\textcopyright} 2022",

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doi = "10.1016/j.ceramint.2022.01.118",

language = "English",

volume = "48",

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journal = "Ceramics International",

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T1 - Comparison of topotactic and magnetic structures for manganite oxide films

AU - Liu, Yukuai

AU - Hu, Sixia

AU - Zhao, Boyang

AU - Shi, Xinrong

AU - Zeng, Xiezong

AU - Leung, Chi Wah

AU - Huang, Chuanwei

N1 - Funding Information: C.W. H. gratefully acknowledges the Guangdong Basic and Applied Basic Research Foundation ( 2019A1515011529 ) and the support from Hubei Key Laboratory of Polymer Materials , Hubei University . X.R.S thanks the Science and Technology Project of Guangdong Market Supervision Bureau ( 2021ZJ04 ). Y.K.L thanks the Research Fund of Zhao Qing University ( 2021011832 ). Publisher Copyright: © 2022

PY - 2022/5/1

Y1 - 2022/5/1

N2 - Deliberate manipulation of topotactic transformation via oxygen insertion/extraction offers a feasible way to precisely tune oxygen concentration, B–O coordination occupation and resultant electronic functionalities of perovskite (ABO3)-based oxides. Herein, two methods, a post-annealing CaH2 treatment and an in-situ oxygen-vacancy diffusion using oxygen getter layer, were conducted to achieve topotactic transitions from perovskite to brownmillerite of La0·7Sr0·3MnO3-δ (LSMO, 0 ≤ δ ≤ 0.5) films. The results revealed that delicate control of oxygen composition is the crucial factor for evolutions of crystalline structure and subsequent magnetic properties of LSMO films. In particular, the brownmillerite LSMO film treated by the in-situ oxygen getter layer possesses desirable structural stability over time. In contrast, the topotactic LSMO films using reduction agents CaH2 exhibit compositional and structural inhomogeneities. These findings suggest that adjustable topotactic transformation through anionic oxygen provides a facile strategy for designing multifunctional perovskite-derivative oxide materials.

AB - Deliberate manipulation of topotactic transformation via oxygen insertion/extraction offers a feasible way to precisely tune oxygen concentration, B–O coordination occupation and resultant electronic functionalities of perovskite (ABO3)-based oxides. Herein, two methods, a post-annealing CaH2 treatment and an in-situ oxygen-vacancy diffusion using oxygen getter layer, were conducted to achieve topotactic transitions from perovskite to brownmillerite of La0·7Sr0·3MnO3-δ (LSMO, 0 ≤ δ ≤ 0.5) films. The results revealed that delicate control of oxygen composition is the crucial factor for evolutions of crystalline structure and subsequent magnetic properties of LSMO films. In particular, the brownmillerite LSMO film treated by the in-situ oxygen getter layer possesses desirable structural stability over time. In contrast, the topotactic LSMO films using reduction agents CaH2 exhibit compositional and structural inhomogeneities. These findings suggest that adjustable topotactic transformation through anionic oxygen provides a facile strategy for designing multifunctional perovskite-derivative oxide materials.

KW - Brownmillerite

KW - Magnetic insulator

KW - Manganite oxide film

KW - Pulsed laser deposition

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DO - 10.1016/j.ceramint.2022.01.118

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VL - 48

SP - 12515

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JO - Ceramics International

JF - Ceramics International

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ER -

Comparison of topotactic and magnetic structures for manganite oxide films

Abstract

Keywords

ASJC Scopus subject areas

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