Structural and transport properties of epitaxial Ba(Fe1-xCox)2As2thin films on various substrates

Q. Y. Lei; M. Golalikhani; D. Y. Yang; W. K. Withanage; A. Rafti; J. Qiu; M. Hambe; E. D. Bauer; F. Ronning; Q. X. Jia; J. D. Weiss; E. E. Hellstrom; X. F. Wang; X. H. Chen; F. Williams; Q. Yang; D. Temple; X. X. Xi

doi:10.1088/0953-2048/27/11/115010

Structural and transport properties of epitaxial Ba(Fe_1-xCo_x)₂As₂thin films on various substrates

Q. Y. Lei
, M. Golalikhani
, D. Y. Yang
, W. K. Withanage
, A. Rafti
, J. Qiu
, M. Hambe
, E. D. Bauer
, F. Ronning
, Q. X. Jia
, J. D. Weiss
, E. E. Hellstrom
, X. F. Wang
, X. H. Chen
, F. Williams
, Q. Yang
, D. Temple
, X. X. Xi

Department of Materials Design and Innovation

University at Buffalo

Temple University
Los Alamos National Laboratory
Florida State University
University of Science and Technology of China
Norfolk State University

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

17 Scopus citations

Abstract

A comprehensive microstructural study was conducted on optimally-doped epitaxial Ba(Fe_1-xCo_x)₂As₂thin films grown by pulsed laser deposition on various substrates of a wide range of lattice constants: SrTiO₃, LaAlO₃, (La,Sr)(Al,Ta)O₃, MgO, CaF₂, and BaF₂. We found that epitaxial strain directly affects the superconductivity in the film, with the transition temperature decreasing linearly with increasing in-plane lattice constant of the film. However, the strain is not determined by the lattice mismatch between the film and substrate. Instead, the mosaic spread of the grain orientation in the film and the thermal expansion coefficient of the substrate were found to correlate well with the in-plane lattice constant of the film. The result confirms the importance of structural distortions to the superconductivity in the Ba(Fe_1-xCo_x)₂As₂films.

Original language	English
Article number	115010
Journal	Superconductor Science and Technology
Volume	27
Issue number	11
DOIs	https://doi.org/10.1088/0953-2048/27/11/115010
State	Published - Nov 1 2014

Keywords

microstructure
superconductor
thin films

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Lei, Q. Y., Golalikhani, M., Yang, D. Y., Withanage, W. K., Rafti, A., Qiu, J., Hambe, M., Bauer, E. D., Ronning, F., Jia, Q. X., Weiss, J. D., Hellstrom, E. E., Wang, X. F., Chen, X. H., Williams, F., Yang, Q., Temple, D., & Xi, X. X. (2014). Structural and transport properties of epitaxial Ba(Fe_1-xCo_x)₂As₂thin films on various substrates. Superconductor Science and Technology, 27(11), Article 115010. https://doi.org/10.1088/0953-2048/27/11/115010

@article{f44a2e104e334fe080cd6a2171b379bb,

title = "Structural and transport properties of epitaxial Ba(Fe1-xCox)2As2thin films on various substrates",

abstract = "A comprehensive microstructural study was conducted on optimally-doped epitaxial Ba(Fe1-xCox)2As2thin films grown by pulsed laser deposition on various substrates of a wide range of lattice constants: SrTiO3, LaAlO3, (La,Sr)(Al,Ta)O3, MgO, CaF2, and BaF2. We found that epitaxial strain directly affects the superconductivity in the film, with the transition temperature decreasing linearly with increasing in-plane lattice constant of the film. However, the strain is not determined by the lattice mismatch between the film and substrate. Instead, the mosaic spread of the grain orientation in the film and the thermal expansion coefficient of the substrate were found to correlate well with the in-plane lattice constant of the film. The result confirms the importance of structural distortions to the superconductivity in the Ba(Fe1-xCox)2As2films.",

keywords = "microstructure, superconductor, thin films",

author = "Lei, \{Q. Y.\} and M. Golalikhani and Yang, \{D. Y.\} and Withanage, \{W. K.\} and A. Rafti and J. Qiu and M. Hambe and Bauer, \{E. D.\} and F. Ronning and Jia, \{Q. X.\} and Weiss, \{J. D.\} and Hellstrom, \{E. E.\} and Wang, \{X. F.\} and Chen, \{X. H.\} and F. Williams and Q. Yang and D. Temple and Xi, \{X. X.\}",

note = "Publisher Copyright: {\textcopyright} 2014 IOP Publishing Ltd.",

year = "2014",

month = nov,

day = "1",

doi = "10.1088/0953-2048/27/11/115010",

language = "English",

volume = "27",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

publisher = "Institute of Physics",

number = "11",

}

Lei, QY, Golalikhani, M, Yang, DY, Withanage, WK, Rafti, A, Qiu, J, Hambe, M, Bauer, ED, Ronning, F, Jia, QX, Weiss, JD, Hellstrom, EE, Wang, XF, Chen, XH, Williams, F, Yang, Q, Temple, D & Xi, XX 2014, 'Structural and transport properties of epitaxial Ba(Fe_1-xCo_x)₂As₂thin films on various substrates', Superconductor Science and Technology, vol. 27, no. 11, 115010. https://doi.org/10.1088/0953-2048/27/11/115010

TY - JOUR

T1 - Structural and transport properties of epitaxial Ba(Fe1-xCox)2As2thin films on various substrates

AU - Lei, Q. Y.

AU - Golalikhani, M.

AU - Yang, D. Y.

AU - Withanage, W. K.

AU - Rafti, A.

AU - Qiu, J.

AU - Hambe, M.

AU - Bauer, E. D.

AU - Ronning, F.

AU - Jia, Q. X.

AU - Weiss, J. D.

AU - Hellstrom, E. E.

AU - Wang, X. F.

AU - Chen, X. H.

AU - Williams, F.

AU - Yang, Q.

AU - Temple, D.

AU - Xi, X. X.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - A comprehensive microstructural study was conducted on optimally-doped epitaxial Ba(Fe1-xCox)2As2thin films grown by pulsed laser deposition on various substrates of a wide range of lattice constants: SrTiO3, LaAlO3, (La,Sr)(Al,Ta)O3, MgO, CaF2, and BaF2. We found that epitaxial strain directly affects the superconductivity in the film, with the transition temperature decreasing linearly with increasing in-plane lattice constant of the film. However, the strain is not determined by the lattice mismatch between the film and substrate. Instead, the mosaic spread of the grain orientation in the film and the thermal expansion coefficient of the substrate were found to correlate well with the in-plane lattice constant of the film. The result confirms the importance of structural distortions to the superconductivity in the Ba(Fe1-xCox)2As2films.

AB - A comprehensive microstructural study was conducted on optimally-doped epitaxial Ba(Fe1-xCox)2As2thin films grown by pulsed laser deposition on various substrates of a wide range of lattice constants: SrTiO3, LaAlO3, (La,Sr)(Al,Ta)O3, MgO, CaF2, and BaF2. We found that epitaxial strain directly affects the superconductivity in the film, with the transition temperature decreasing linearly with increasing in-plane lattice constant of the film. However, the strain is not determined by the lattice mismatch between the film and substrate. Instead, the mosaic spread of the grain orientation in the film and the thermal expansion coefficient of the substrate were found to correlate well with the in-plane lattice constant of the film. The result confirms the importance of structural distortions to the superconductivity in the Ba(Fe1-xCox)2As2films.

KW - microstructure

KW - superconductor

KW - thin films

UR - https://www.scopus.com/pages/publications/84907894949

U2 - 10.1088/0953-2048/27/11/115010

DO - 10.1088/0953-2048/27/11/115010

M3 - Article

SN - 0953-2048

VL - 27

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 11

M1 - 115010

ER -

Structural and transport properties of epitaxial Ba(Fe_1-xCo_x)₂As₂thin films on various substrates

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Keywords

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