Effect of Ba/Y ratio in starting solution on microstructure evolution of YBCO films deposited by advanced TFA-MOD process

J. Matsuda; K. Nakaoka; T. Izumi; Y. Yamada; Y. Shiohara

doi:10.1016/j.physc.2008.04.017

Effect of Ba/Y ratio in starting solution on microstructure evolution of YBCO films deposited by advanced TFA-MOD process

J. Matsuda, K. Nakaoka, T. Izumi, Y. Yamada, Y. Shiohara

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

15 Citations (Scopus)

Abstract

We have found that high critical current (I_C) values of YBa₂Cu₃O_7-y (YBCO) films are achieved by using the starting solution with the Ba/Y ratio less than 2.0 in the advanced TFA-MOD process. TEM observation revealed that there are few large pores in the YBCO final films with the Ba/Y ratio less than 2.0. Furthermore, from results of investigation of quenched films prepared by cooling rapidly during the calcination process, low Ba content in the starting solution was found to have an effect on attaining the precursor film with low porosity and uniform elemental distribution of cations. As for the crystallization process, there was no significant difference in phases and sizes of non-superconducting precipitates generated before YBCO epitaxial growth, irrespective of the Ba/Y ratio. However, homogeneity of lateral growth rate of the YBCO film is improved, when the starting solution with Ba/Y ratio less than 2.0 is used.

Original language	English
Pages (from-to)	997-1005
Number of pages	9
Journal	Physica C: Superconductivity and its applications
Volume	468
Issue number	14
DOIs	https://doi.org/10.1016/j.physc.2008.04.017
Publication status	Published - Jul 15 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Effect of Ba/Y ratio in starting solution on microstructure evolution of YBCO films deposited by advanced TFA-MOD process",

abstract = "We have found that high critical current (IC) values of YBa2Cu3O7-y (YBCO) films are achieved by using the starting solution with the Ba/Y ratio less than 2.0 in the advanced TFA-MOD process. TEM observation revealed that there are few large pores in the YBCO final films with the Ba/Y ratio less than 2.0. Furthermore, from results of investigation of quenched films prepared by cooling rapidly during the calcination process, low Ba content in the starting solution was found to have an effect on attaining the precursor film with low porosity and uniform elemental distribution of cations. As for the crystallization process, there was no significant difference in phases and sizes of non-superconducting precipitates generated before YBCO epitaxial growth, irrespective of the Ba/Y ratio. However, homogeneity of lateral growth rate of the YBCO film is improved, when the starting solution with Ba/Y ratio less than 2.0 is used.",

author = "J. Matsuda and K. Nakaoka and T. Izumi and Y. Yamada and Y. Shiohara",

year = "2008",

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doi = "10.1016/j.physc.2008.04.017",

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journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Effect of Ba/Y ratio in starting solution on microstructure evolution of YBCO films deposited by advanced TFA-MOD process

AU - Matsuda, J.

AU - Nakaoka, K.

AU - Izumi, T.

AU - Yamada, Y.

AU - Shiohara, Y.

PY - 2008/7/15

Y1 - 2008/7/15

N2 - We have found that high critical current (IC) values of YBa2Cu3O7-y (YBCO) films are achieved by using the starting solution with the Ba/Y ratio less than 2.0 in the advanced TFA-MOD process. TEM observation revealed that there are few large pores in the YBCO final films with the Ba/Y ratio less than 2.0. Furthermore, from results of investigation of quenched films prepared by cooling rapidly during the calcination process, low Ba content in the starting solution was found to have an effect on attaining the precursor film with low porosity and uniform elemental distribution of cations. As for the crystallization process, there was no significant difference in phases and sizes of non-superconducting precipitates generated before YBCO epitaxial growth, irrespective of the Ba/Y ratio. However, homogeneity of lateral growth rate of the YBCO film is improved, when the starting solution with Ba/Y ratio less than 2.0 is used.

AB - We have found that high critical current (IC) values of YBa2Cu3O7-y (YBCO) films are achieved by using the starting solution with the Ba/Y ratio less than 2.0 in the advanced TFA-MOD process. TEM observation revealed that there are few large pores in the YBCO final films with the Ba/Y ratio less than 2.0. Furthermore, from results of investigation of quenched films prepared by cooling rapidly during the calcination process, low Ba content in the starting solution was found to have an effect on attaining the precursor film with low porosity and uniform elemental distribution of cations. As for the crystallization process, there was no significant difference in phases and sizes of non-superconducting precipitates generated before YBCO epitaxial growth, irrespective of the Ba/Y ratio. However, homogeneity of lateral growth rate of the YBCO film is improved, when the starting solution with Ba/Y ratio less than 2.0 is used.

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