Growth at high rates of epitaxial ybco film assisted by liquid phase

T. Ohnishi; J. U. Huh; W. Jo; R. H. Hammond

Growth at high rates of epitaxial ybco film assisted by liquid phase

T. Ohnishi, J. U. Huh, W. Jo, R. H. Hammond

Department of Physics

Research output: Contribution to conference › Paper › peer-review

Abstract

High-rate in-situ YBa ₂Cu ₃O ₇ (YBCO) films are grown by means of molecular beam epitaxy with electron beam co-evaporation. Even though our oxygen pressure is low, ∼ 5 × 10 ^-5 Torr, we can synthesize as-grown superconducting YBCO films at a deposition rate of 10 nm/s, with critical current density (J _c) more than 2 MA/cm ². Relatively high temperatures of around 900°C were necessary in this process so far. At this temperature at a given oxygen activity a Ba-Cu-O liquid forms along with the YBCO epitaxy. This liquid seems essential for high Jc YBCO film growth at very high growth rate and may be essential for all high-rate processes. Consideration of the YBCO phase stability in the liquid Ba-Cu-O leads to a possibility of lower temperature growth down to 800°C, and lower still by the addition of oxyfluorides to the liquid, suitable for coated conductor tape synthesis.

Original language	English
Pages	299-312
Number of pages	14
State	Published - 2005
Event	Epitaxial Growth of Functional Oxides - Proceedings of the International Symposium - Orlando, FL, United States Duration: 12 Oct 2003 → 17 Oct 2003

Conference

Conference	Epitaxial Growth of Functional Oxides - Proceedings of the International Symposium
Country/Territory	United States
City	Orlando, FL
Period	12/10/03 → 17/10/03

Cite this

@conference{be144d2efaf24fb691547d2b0d0cd1fd,

title = "Growth at high rates of epitaxial ybco film assisted by liquid phase",

abstract = "High-rate in-situ YBa 2Cu 3O 7 (YBCO) films are grown by means of molecular beam epitaxy with electron beam co-evaporation. Even though our oxygen pressure is low, ∼ 5 × 10 -5 Torr, we can synthesize as-grown superconducting YBCO films at a deposition rate of 10 nm/s, with critical current density (J c) more than 2 MA/cm 2. Relatively high temperatures of around 900°C were necessary in this process so far. At this temperature at a given oxygen activity a Ba-Cu-O liquid forms along with the YBCO epitaxy. This liquid seems essential for high Jc YBCO film growth at very high growth rate and may be essential for all high-rate processes. Consideration of the YBCO phase stability in the liquid Ba-Cu-O leads to a possibility of lower temperature growth down to 800°C, and lower still by the addition of oxyfluorides to the liquid, suitable for coated conductor tape synthesis.",

author = "T. Ohnishi and Huh, {J. U.} and W. Jo and Hammond, {R. H.}",

year = "2005",

language = "English",

pages = "299--312",

note = "Epitaxial Growth of Functional Oxides - Proceedings of the International Symposium ; Conference date: 12-10-2003 Through 17-10-2003",

}

TY - CONF

T1 - Growth at high rates of epitaxial ybco film assisted by liquid phase

AU - Ohnishi, T.

AU - Huh, J. U.

AU - Jo, W.

AU - Hammond, R. H.

PY - 2005

Y1 - 2005

N2 - High-rate in-situ YBa 2Cu 3O 7 (YBCO) films are grown by means of molecular beam epitaxy with electron beam co-evaporation. Even though our oxygen pressure is low, ∼ 5 × 10 -5 Torr, we can synthesize as-grown superconducting YBCO films at a deposition rate of 10 nm/s, with critical current density (J c) more than 2 MA/cm 2. Relatively high temperatures of around 900°C were necessary in this process so far. At this temperature at a given oxygen activity a Ba-Cu-O liquid forms along with the YBCO epitaxy. This liquid seems essential for high Jc YBCO film growth at very high growth rate and may be essential for all high-rate processes. Consideration of the YBCO phase stability in the liquid Ba-Cu-O leads to a possibility of lower temperature growth down to 800°C, and lower still by the addition of oxyfluorides to the liquid, suitable for coated conductor tape synthesis.

AB - High-rate in-situ YBa 2Cu 3O 7 (YBCO) films are grown by means of molecular beam epitaxy with electron beam co-evaporation. Even though our oxygen pressure is low, ∼ 5 × 10 -5 Torr, we can synthesize as-grown superconducting YBCO films at a deposition rate of 10 nm/s, with critical current density (J c) more than 2 MA/cm 2. Relatively high temperatures of around 900°C were necessary in this process so far. At this temperature at a given oxygen activity a Ba-Cu-O liquid forms along with the YBCO epitaxy. This liquid seems essential for high Jc YBCO film growth at very high growth rate and may be essential for all high-rate processes. Consideration of the YBCO phase stability in the liquid Ba-Cu-O leads to a possibility of lower temperature growth down to 800°C, and lower still by the addition of oxyfluorides to the liquid, suitable for coated conductor tape synthesis.

UR - http://www.scopus.com/inward/record.url?scp=28544450841&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:28544450841

SP - 299

EP - 312

T2 - Epitaxial Growth of Functional Oxides - Proceedings of the International Symposium

Y2 - 12 October 2003 through 17 October 2003

ER -

Growth at high rates of epitaxial ybco film assisted by liquid phase

Abstract

Conference

Fingerprint

Cite this