Raman scattering studies of YBa2Cu3O7-X films grown by high-rate e-beam co-evaporation

E. Lee; H. R. Yoon; W. Jo; S. Yoon; H. Cheong; H. G. Lee; G. W. Hong; J. U. Huh; R. H. Hammond; M. R. Beasley

doi:10.1109/TASC.2007.899434

Raman scattering studies of YBa₂Cu₃O_7-X films grown by high-rate e-beam co-evaporation

E. Lee, H. R. Yoon, W. Jo, S. Yoon, H. Cheong, H. G. Lee, G. W. Hong, J. U. Huh, R. H. Hammond, M. R. Beasley

Department of Physics

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

1 Scopus citations

Abstract

We present results of Raman scattering studies of superconducting YBa ₂Cu₃o_7-x (YBCO) films grown by a high-rate electron-beam co-evaporation method. It is shown by X-ray diffraction that the as-grown YBCO films have a highly c-axis oriented and in-plane aligned texture. Raman scattering measurements were used to study optical phonon modes, oxygen content and second phases of the YBCO coated conductors. Raman spectra of YBCO films with lower-transport properties exhibit additional phonon modes at ∼ 300 cm^-1, ∼ 600 cm^-1, and ∼ 630 cm^-1, which are related to second-phases such as Ba₂Cu₃O _5.9 and BaCuO₂. We also performed micro-Raman scattering measurements, which enable the local characterization of the material over a few micrometer scales. We could clearly determine the chemical homogeneities of the films on which we could not have information using XRD. Our results strongly suggest that micro-Raman scattering can be a very effective tool for characterizing structural and chemical properties, which is essential for optimizing growth conditions.

Original language	English
Pages (from-to)	3325-3328
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.899434
State	Published - Jun 2007

Bibliographical note

Funding Information:
Manuscript received August 29, 2006. This work was supported in part by a Grant (R-2004-0-194) from Ministry of Commerce, Industry and Energy (MOCIE), Republic of Korea, and in part by a Grant from Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea. E. Lee is with the Division of Nanosciences, Ewha Womans University, Seoul, 120-750, Korea. H. R. Yoon is with the Department of Physics, Ewha Womans University, Seoul, 120-750, Korea. W. Jo and S. Yoon are with the Department of Physics and Division of Nanosciences, Ewha Womans University, Seoul, 120-750, Korea (e-mail: wmjo@ewha.ac.kr; syoon@ewha.ac.kr). H. Cheong is with the Department of Physics, Sogang University, Seoul 121-741, Korea. H. G. Lee and G. W. Hong are with the Graduate School of Energy, Korea Polytechnic University, Gyeonggi-Do 429-793, Korea. J. U. Huh, R. H. Hammond, and M. R. Beasley are with the Geballe Lab for Advanced Materials, Stanford University, Stanford, CA 94305 USA. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2007.899434

Keywords

Co-evaporation
Local chemical variation
Raman scattering
YBCO films

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10.1109/TASC.2007.899434

Cite this

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title = "Raman scattering studies of YBa2Cu3O7-X films grown by high-rate e-beam co-evaporation",

abstract = "We present results of Raman scattering studies of superconducting YBa 2Cu3o7-x (YBCO) films grown by a high-rate electron-beam co-evaporation method. It is shown by X-ray diffraction that the as-grown YBCO films have a highly c-axis oriented and in-plane aligned texture. Raman scattering measurements were used to study optical phonon modes, oxygen content and second phases of the YBCO coated conductors. Raman spectra of YBCO films with lower-transport properties exhibit additional phonon modes at ∼ 300 cm-1, ∼ 600 cm-1, and ∼ 630 cm-1, which are related to second-phases such as Ba2Cu3O 5.9 and BaCuO2. We also performed micro-Raman scattering measurements, which enable the local characterization of the material over a few micrometer scales. We could clearly determine the chemical homogeneities of the films on which we could not have information using XRD. Our results strongly suggest that micro-Raman scattering can be a very effective tool for characterizing structural and chemical properties, which is essential for optimizing growth conditions.",

keywords = "Co-evaporation, Local chemical variation, Raman scattering, YBCO films",

author = "E. Lee and Yoon, {H. R.} and W. Jo and S. Yoon and H. Cheong and Lee, {H. G.} and Hong, {G. W.} and Huh, {J. U.} and Hammond, {R. H.} and Beasley, {M. R.}",

note = "Funding Information: Manuscript received August 29, 2006. This work was supported in part by a Grant (R-2004-0-194) from Ministry of Commerce, Industry and Energy (MOCIE), Republic of Korea, and in part by a Grant from Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea. E. Lee is with the Division of Nanosciences, Ewha Womans University, Seoul, 120-750, Korea. H. R. Yoon is with the Department of Physics, Ewha Womans University, Seoul, 120-750, Korea. W. Jo and S. Yoon are with the Department of Physics and Division of Nanosciences, Ewha Womans University, Seoul, 120-750, Korea (e-mail: wmjo@ewha.ac.kr; syoon@ewha.ac.kr). H. Cheong is with the Department of Physics, Sogang University, Seoul 121-741, Korea. H. G. Lee and G. W. Hong are with the Graduate School of Energy, Korea Polytechnic University, Gyeonggi-Do 429-793, Korea. J. U. Huh, R. H. Hammond, and M. R. Beasley are with the Geballe Lab for Advanced Materials, Stanford University, Stanford, CA 94305 USA. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2007.899434",

year = "2007",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Raman scattering studies of YBa2Cu3O7-X films grown by high-rate e-beam co-evaporation

AU - Lee, E.

AU - Yoon, H. R.

AU - Jo, W.

AU - Yoon, S.

AU - Cheong, H.

AU - Lee, H. G.

AU - Hong, G. W.

AU - Huh, J. U.

AU - Hammond, R. H.

AU - Beasley, M. R.

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PY - 2007/6

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N2 - We present results of Raman scattering studies of superconducting YBa 2Cu3o7-x (YBCO) films grown by a high-rate electron-beam co-evaporation method. It is shown by X-ray diffraction that the as-grown YBCO films have a highly c-axis oriented and in-plane aligned texture. Raman scattering measurements were used to study optical phonon modes, oxygen content and second phases of the YBCO coated conductors. Raman spectra of YBCO films with lower-transport properties exhibit additional phonon modes at ∼ 300 cm-1, ∼ 600 cm-1, and ∼ 630 cm-1, which are related to second-phases such as Ba2Cu3O 5.9 and BaCuO2. We also performed micro-Raman scattering measurements, which enable the local characterization of the material over a few micrometer scales. We could clearly determine the chemical homogeneities of the films on which we could not have information using XRD. Our results strongly suggest that micro-Raman scattering can be a very effective tool for characterizing structural and chemical properties, which is essential for optimizing growth conditions.

AB - We present results of Raman scattering studies of superconducting YBa 2Cu3o7-x (YBCO) films grown by a high-rate electron-beam co-evaporation method. It is shown by X-ray diffraction that the as-grown YBCO films have a highly c-axis oriented and in-plane aligned texture. Raman scattering measurements were used to study optical phonon modes, oxygen content and second phases of the YBCO coated conductors. Raman spectra of YBCO films with lower-transport properties exhibit additional phonon modes at ∼ 300 cm-1, ∼ 600 cm-1, and ∼ 630 cm-1, which are related to second-phases such as Ba2Cu3O 5.9 and BaCuO2. We also performed micro-Raman scattering measurements, which enable the local characterization of the material over a few micrometer scales. We could clearly determine the chemical homogeneities of the films on which we could not have information using XRD. Our results strongly suggest that micro-Raman scattering can be a very effective tool for characterizing structural and chemical properties, which is essential for optimizing growth conditions.

KW - Co-evaporation

KW - Local chemical variation

KW - Raman scattering

KW - YBCO films

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DO - 10.1109/TASC.2007.899434

M3 - Article

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