Optimization of Nd1+xBa2-xCu3O7 thin-film growth conditions using micro-Raman spectroscopy

J. S. Bae; In Sang Yang; W. Jo; S. H. Wee; S. I. Yoo

doi:10.1088/0953-2048/19/1/017

Optimization of Nd_1+xBa_2-xCu₃O₇ thin-film growth conditions using micro-Raman spectroscopy

J. S. Bae, In Sang Yang, W. Jo, S. H. Wee, S. I. Yoo

Department of Physics

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

7 Scopus citations

Abstract

We explore optimal growth conditions for superconducting Nd _1+xBa_2-xCu₃O₇ (NdBCO) thin films deposited under various oxygen pressures in the range of 100-800 mTorr. In this study we address spatial inhomogeneity, growth orientation, impurity phases, cation disorder, and oxygen deficiency of NdBCO thin films by using micro-Raman scattering. The films grown in the low oxygen pressure range of 100-200 mTorr show predominantly a-axis orientation and degraded superconducting properties with a critical temperature (T_c) of ∼80 K. The degradation of the transition temperature of the films deposited at lower oxygen pressure is attributed to the cation disorder, on the basis of analysis of the apical oxygen Raman mode. On the other hand, the samples grown in the higher oxygen pressure range of 400-800 mTorr show strong c-axis orientation and much less cation disorder. These features correlate with their high values of T_c and J_c.

Original language	English
Pages (from-to)	102-107
Number of pages	6
Journal	Superconductor Science and Technology
Volume	19
Issue number	1
DOIs	https://doi.org/10.1088/0953-2048/19/1/017
State	Published - 1 Jan 2006

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title = "Optimization of Nd1+xBa2-xCu3O7 thin-film growth conditions using micro-Raman spectroscopy",

abstract = "We explore optimal growth conditions for superconducting Nd 1+xBa2-xCu3O7 (NdBCO) thin films deposited under various oxygen pressures in the range of 100-800 mTorr. In this study we address spatial inhomogeneity, growth orientation, impurity phases, cation disorder, and oxygen deficiency of NdBCO thin films by using micro-Raman scattering. The films grown in the low oxygen pressure range of 100-200 mTorr show predominantly a-axis orientation and degraded superconducting properties with a critical temperature (Tc) of ∼80 K. The degradation of the transition temperature of the films deposited at lower oxygen pressure is attributed to the cation disorder, on the basis of analysis of the apical oxygen Raman mode. On the other hand, the samples grown in the higher oxygen pressure range of 400-800 mTorr show strong c-axis orientation and much less cation disorder. These features correlate with their high values of Tc and Jc.",

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T1 - Optimization of Nd1+xBa2-xCu3O7 thin-film growth conditions using micro-Raman spectroscopy

AU - Bae, J. S.

AU - Yang, In Sang

AU - Jo, W.

AU - Wee, S. H.

AU - Yoo, S. I.

PY - 2006/1/1

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N2 - We explore optimal growth conditions for superconducting Nd 1+xBa2-xCu3O7 (NdBCO) thin films deposited under various oxygen pressures in the range of 100-800 mTorr. In this study we address spatial inhomogeneity, growth orientation, impurity phases, cation disorder, and oxygen deficiency of NdBCO thin films by using micro-Raman scattering. The films grown in the low oxygen pressure range of 100-200 mTorr show predominantly a-axis orientation and degraded superconducting properties with a critical temperature (Tc) of ∼80 K. The degradation of the transition temperature of the films deposited at lower oxygen pressure is attributed to the cation disorder, on the basis of analysis of the apical oxygen Raman mode. On the other hand, the samples grown in the higher oxygen pressure range of 400-800 mTorr show strong c-axis orientation and much less cation disorder. These features correlate with their high values of Tc and Jc.

AB - We explore optimal growth conditions for superconducting Nd 1+xBa2-xCu3O7 (NdBCO) thin films deposited under various oxygen pressures in the range of 100-800 mTorr. In this study we address spatial inhomogeneity, growth orientation, impurity phases, cation disorder, and oxygen deficiency of NdBCO thin films by using micro-Raman scattering. The films grown in the low oxygen pressure range of 100-200 mTorr show predominantly a-axis orientation and degraded superconducting properties with a critical temperature (Tc) of ∼80 K. The degradation of the transition temperature of the films deposited at lower oxygen pressure is attributed to the cation disorder, on the basis of analysis of the apical oxygen Raman mode. On the other hand, the samples grown in the higher oxygen pressure range of 400-800 mTorr show strong c-axis orientation and much less cation disorder. These features correlate with their high values of Tc and Jc.

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Optimization of Nd1+xBa2-xCu3O7 thin-film growth conditions using micro-Raman spectroscopy

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Optimization of Nd_1+xBa_2-xCu₃O₇ thin-film growth conditions using micro-Raman spectroscopy