Electrical property modulation of Au/Ba0.6Sr0.4TiO3/La0.7Sr0.3MnO3 structure by continuous composition spread Mn doping

Jie Qiu; Guozhen Liu; Jerome Wolfman; Jie Xing

doi:10.1016/j.ceramint.2022.01.038

Electrical property modulation of Au/Ba_0.6Sr_0.4TiO₃/La_0.7Sr_0.3MnO₃ structure by continuous composition spread Mn doping

Jie Qiu, Guozhen Liu, Jerome Wolfman, Jie Xing

Research output: Contribution to journal › Article › peer-review

Abstract

Composition spread Mn-doped Ba_0.6Sr_0.4Ti_1-xMn_xO₃ (BSTMx, 0 ≤x ≤ 0.05) thin films were prepared on La_0.7Sr_0.3MnO₃/SrTiO₃ (LSMO/STO) layer by combinatorial pulsed laser deposition. When x is less than 3.3%, the BSTMx films are single phase according to X-ray diffraction data, and the Au/BSTMx/LSMO structure presents asymmetric transport properties. The asymmetry of the transport property gets weak with increasing Mn doping concentration. The reverse-bias current density of the Au/BSTMx/LSMO structure remains at a low value of 10⁻⁷ A/cm², and the forward-bias current density reduces rapidly with the ascending doping content (x ≤ 1.8%). Further increasing the Mn content, the differences between the positive and reverse current densities become smaller, and almost vanish when the Mn content is greater than 3.8%, indicating the disappearance of the asymmetry of the transport property. The effects of the LSMO electrode, Au/BSTMx Schottky junction, BSTMx thin film, and BSTMx/LSMO interface on the whole electrical transport properties are discussed by virtue of the experimental and fitted impedance spectrums. Our results are helpful for insight into the doping mechanisms in perovskite oxides.

Original language	English
Pages (from-to)	11786-11792
Number of pages	7
Journal	Ceramics International
Volume	48
Issue number	8
DOIs	https://doi.org/10.1016/j.ceramint.2022.01.038
State	Published - Apr 15 2022
Externally published	Yes

Funding

This work is supported by the National Natural Science Foundation of China (Grant Nos. 12074282 , 11974318 ), Suzhou Key Laboratory for Low Dimensional Optoelectronic Materials and Devices ( SZS201611 ).

Funders	Funder number
Suzhou Key Laboratory for Low Dimensional Optoelectronic Materials and Devices	SZS201611
National Natural Science Foundation of China	12074282, 11974318

Keywords

Dielectric properties
Ferroelectric thin films
Heterostructures
Pulsed laser deposition
Transport properties

Access to Document

10.1016/j.ceramint.2022.01.038

Cite this

@article{67f8ab25d9ac401684bca5311741174c,

title = "Electrical property modulation of Au/Ba0.6Sr0.4TiO3/La0.7Sr0.3MnO3 structure by continuous composition spread Mn doping",

abstract = "Composition spread Mn-doped Ba0.6Sr0.4Ti1-xMnxO3 (BSTMx, 0 ≤x ≤ 0.05) thin films were prepared on La0.7Sr0.3MnO3/SrTiO3 (LSMO/STO) layer by combinatorial pulsed laser deposition. When x is less than 3.3%, the BSTMx films are single phase according to X-ray diffraction data, and the Au/BSTMx/LSMO structure presents asymmetric transport properties. The asymmetry of the transport property gets weak with increasing Mn doping concentration. The reverse-bias current density of the Au/BSTMx/LSMO structure remains at a low value of 10−7 A/cm2, and the forward-bias current density reduces rapidly with the ascending doping content (x ≤ 1.8%). Further increasing the Mn content, the differences between the positive and reverse current densities become smaller, and almost vanish when the Mn content is greater than 3.8%, indicating the disappearance of the asymmetry of the transport property. The effects of the LSMO electrode, Au/BSTMx Schottky junction, BSTMx thin film, and BSTMx/LSMO interface on the whole electrical transport properties are discussed by virtue of the experimental and fitted impedance spectrums. Our results are helpful for insight into the doping mechanisms in perovskite oxides.",

keywords = "Dielectric properties, Ferroelectric thin films, Heterostructures, Pulsed laser deposition, Transport properties",

author = "Jie Qiu and Guozhen Liu and Jerome Wolfman and Jie Xing",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2022",

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doi = "10.1016/j.ceramint.2022.01.038",

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T1 - Electrical property modulation of Au/Ba0.6Sr0.4TiO3/La0.7Sr0.3MnO3 structure by continuous composition spread Mn doping

AU - Qiu, Jie

AU - Liu, Guozhen

AU - Wolfman, Jerome

AU - Xing, Jie

PY - 2022/4/15

Y1 - 2022/4/15

N2 - Composition spread Mn-doped Ba0.6Sr0.4Ti1-xMnxO3 (BSTMx, 0 ≤x ≤ 0.05) thin films were prepared on La0.7Sr0.3MnO3/SrTiO3 (LSMO/STO) layer by combinatorial pulsed laser deposition. When x is less than 3.3%, the BSTMx films are single phase according to X-ray diffraction data, and the Au/BSTMx/LSMO structure presents asymmetric transport properties. The asymmetry of the transport property gets weak with increasing Mn doping concentration. The reverse-bias current density of the Au/BSTMx/LSMO structure remains at a low value of 10−7 A/cm2, and the forward-bias current density reduces rapidly with the ascending doping content (x ≤ 1.8%). Further increasing the Mn content, the differences between the positive and reverse current densities become smaller, and almost vanish when the Mn content is greater than 3.8%, indicating the disappearance of the asymmetry of the transport property. The effects of the LSMO electrode, Au/BSTMx Schottky junction, BSTMx thin film, and BSTMx/LSMO interface on the whole electrical transport properties are discussed by virtue of the experimental and fitted impedance spectrums. Our results are helpful for insight into the doping mechanisms in perovskite oxides.

AB - Composition spread Mn-doped Ba0.6Sr0.4Ti1-xMnxO3 (BSTMx, 0 ≤x ≤ 0.05) thin films were prepared on La0.7Sr0.3MnO3/SrTiO3 (LSMO/STO) layer by combinatorial pulsed laser deposition. When x is less than 3.3%, the BSTMx films are single phase according to X-ray diffraction data, and the Au/BSTMx/LSMO structure presents asymmetric transport properties. The asymmetry of the transport property gets weak with increasing Mn doping concentration. The reverse-bias current density of the Au/BSTMx/LSMO structure remains at a low value of 10−7 A/cm2, and the forward-bias current density reduces rapidly with the ascending doping content (x ≤ 1.8%). Further increasing the Mn content, the differences between the positive and reverse current densities become smaller, and almost vanish when the Mn content is greater than 3.8%, indicating the disappearance of the asymmetry of the transport property. The effects of the LSMO electrode, Au/BSTMx Schottky junction, BSTMx thin film, and BSTMx/LSMO interface on the whole electrical transport properties are discussed by virtue of the experimental and fitted impedance spectrums. Our results are helpful for insight into the doping mechanisms in perovskite oxides.

KW - Dielectric properties

KW - Ferroelectric thin films

KW - Heterostructures

KW - Pulsed laser deposition

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