Superconducting YBa2cu2o7 bolometer on polycrystalline diamond

L. Ganapathi; J. P. Zheng; S. Giles; Rama Rao; H. S. Kwok

doi:10.1117/12.176149

Superconducting YBa₂cu₂o₇ bolometer on polycrystalline diamond

L. Ganapathi
, J. P. Zheng
, S. Giles
, Rama Rao
, H. S. Kwok

Department of Electrical Engineering

Excel Superconductor, Inc.
SUNY Buffalo

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

We have deposited superconducting YBCO (YBa₂Cu₃O₇) thin films on polycrystalline diamond using a composite Si/YSZ (yttria stabilized zirconia) diffusion barrier. 10-20 micron thick, free standing diamond films were coated with a micron thick layer of amorphous Si by plasma CVD. This was vacuum annealed at 700°C to crystallize Si prior to the in-situ deposition of YSZ and YBCO by laser ablation. A primary layer of Si was found essential to avoid the peeling of the multilayer structure during the cooling of the substrates. A Tc_zero 50K was observed for the best films. A bolometer fabricated from this film exhibited a 18V/W responsivity and NEP = 6.3 x 109W/s/Hz at 60K. Both the buffer layers and YBCO were polycrystalline. We believe single crystal Si backing CVD grown diamond can be used instead of a polycrystalline Si layer to further improve the quality of the YBCO deposited on polycrystalline diamond.

Original language	English
Pages (from-to)	39-45
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2159
DOIs	https://doi.org/10.1117/12.176149
State	Published - May 20 1994
Event	High-Temperature Superconducting Detectors: Bolometric and Nonbolometric 1994 - Los Angeles, United States Duration: Jan 23 1994 → Jan 29 1994

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title = "Superconducting YBa2cu2o7 bolometer on polycrystalline diamond",

abstract = "We have deposited superconducting YBCO (YBa2Cu3O7) thin films on polycrystalline diamond using a composite Si/YSZ (yttria stabilized zirconia) diffusion barrier. 10-20 micron thick, free standing diamond films were coated with a micron thick layer of amorphous Si by plasma CVD. This was vacuum annealed at 700°C to crystallize Si prior to the in-situ deposition of YSZ and YBCO by laser ablation. A primary layer of Si was found essential to avoid the peeling of the multilayer structure during the cooling of the substrates. A Tc\_zero 50K was observed for the best films. A bolometer fabricated from this film exhibited a 18V/W responsivity and NEP = 6.3 x 109W/s/Hz at 60K. Both the buffer layers and YBCO were polycrystalline. We believe single crystal Si backing CVD grown diamond can be used instead of a polycrystalline Si layer to further improve the quality of the YBCO deposited on polycrystalline diamond.",

author = "L. Ganapathi and Zheng, \{J. P.\} and S. Giles and Rama Rao and Kwok, \{H. S.\}",

note = "Publisher Copyright: {\textcopyright} 1994 SPIE. All rights reserved.; High-Temperature Superconducting Detectors: Bolometric and Nonbolometric 1994 ; Conference date: 23-01-1994 Through 29-01-1994",

year = "1994",

month = may,

day = "20",

doi = "10.1117/12.176149",

language = "English",

volume = "2159",

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journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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T1 - Superconducting YBa2cu2o7 bolometer on polycrystalline diamond

AU - Ganapathi, L.

AU - Zheng, J. P.

AU - Giles, S.

AU - Rao, Rama

AU - Kwok, H. S.

PY - 1994/5/20

Y1 - 1994/5/20

N2 - We have deposited superconducting YBCO (YBa2Cu3O7) thin films on polycrystalline diamond using a composite Si/YSZ (yttria stabilized zirconia) diffusion barrier. 10-20 micron thick, free standing diamond films were coated with a micron thick layer of amorphous Si by plasma CVD. This was vacuum annealed at 700°C to crystallize Si prior to the in-situ deposition of YSZ and YBCO by laser ablation. A primary layer of Si was found essential to avoid the peeling of the multilayer structure during the cooling of the substrates. A Tc_zero 50K was observed for the best films. A bolometer fabricated from this film exhibited a 18V/W responsivity and NEP = 6.3 x 109W/s/Hz at 60K. Both the buffer layers and YBCO were polycrystalline. We believe single crystal Si backing CVD grown diamond can be used instead of a polycrystalline Si layer to further improve the quality of the YBCO deposited on polycrystalline diamond.

AB - We have deposited superconducting YBCO (YBa2Cu3O7) thin films on polycrystalline diamond using a composite Si/YSZ (yttria stabilized zirconia) diffusion barrier. 10-20 micron thick, free standing diamond films were coated with a micron thick layer of amorphous Si by plasma CVD. This was vacuum annealed at 700°C to crystallize Si prior to the in-situ deposition of YSZ and YBCO by laser ablation. A primary layer of Si was found essential to avoid the peeling of the multilayer structure during the cooling of the substrates. A Tc_zero 50K was observed for the best films. A bolometer fabricated from this film exhibited a 18V/W responsivity and NEP = 6.3 x 109W/s/Hz at 60K. Both the buffer layers and YBCO were polycrystalline. We believe single crystal Si backing CVD grown diamond can be used instead of a polycrystalline Si layer to further improve the quality of the YBCO deposited on polycrystalline diamond.

UR - https://www.scopus.com/pages/publications/30244573915

U2 - 10.1117/12.176149

DO - 10.1117/12.176149

M3 - Conference article

AN - SCOPUS:30244573915

SN - 0277-786X

VL - 2159

SP - 39

EP - 45

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - High-Temperature Superconducting Detectors: Bolometric and Nonbolometric 1994

Y2 - 23 January 1994 through 29 January 1994

ER -

Superconducting YBa₂cu₂o₇ bolometer on polycrystalline diamond

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