Recovery Treatment for EuBa2Cu3O 7-δ Films with Insulating Multilayers

Hironori WAKANA; Masaki FUJIBAYASHI; Noriyoshi FUSHIMI; Osamu MICHIKAMI

Recovery Treatment for EuBa₂Cu₃O_7-δ Films with Insulating Multilayers

Hironori WAKANA, Masaki FUJIBAYASHI, Noriyoshi FUSHIMI, Osamu MICHIKAMI

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By depositing insulating layers on oxide superconducting films, the films generally deteriorate. When an insulating multilayer of CeO₂(50 )SrTiO₃(200 ) was grown on 800--thick EuBa₂Cu₃O_7-δ(EBCO) films with T_ce's (T_c endpoint) above 90 K, the films exhibited T_ce's of about 40 K. Recovery of the deteriorated films was carried out by two treatment methods. A pure oxygen treatment, where the deteriorated films were annealed at a temperature (T_sa) of 550C and an oxygen pressure (P_O₂) of 100 kPa for 60 min, and then naturally cooled, restored the films with T_ce's of about 60 K. An activated oxygen plasma (AOP) treatment, where the deteriorated films were exposed to oxygen plasma at a T_sa=550C for 40 min and subsequently oxygen gas was introduced into the chamber up to 2 kPa and then naturally cooled, restored the films with T_ce's of about 84 K. The AOP-treated film was recovered with a cooling rate of less than 6.8C/min, and exhibited T_ce of 90 K. The AOP-treated film took in oxygen more effectively than the pure oxygen-treated film with the cooling process at less than P_O₂=100 kPa.

Publication: IEICE TRANSACTIONS on Electronics Vol.E85-C No.3 pp.780-783

Publication Date: 2002/03/01

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Type of Manuscript: Special Section PAPER (Special Issue on Superconductive Electronics)

Category: Thin Films and Materials

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Hironori WAKANA, Masaki FUJIBAYASHI, Noriyoshi FUSHIMI, Osamu MICHIKAMI, "Recovery Treatment for EuBa2Cu3O 7-δ Films with Insulating Multilayers" in IEICE TRANSACTIONS on Electronics, vol. E85-C, no. 3, pp. 780-783, March 2002, doi: .
Abstract: By depositing insulating layers on oxide superconducting films, the films generally deteriorate. When an insulating multilayer of CeO₂(50 )SrTiO₃(200 ) was grown on 800--thick EuBa₂Cu₃O_7-δ(EBCO) films with T_ce's (T_c endpoint) above 90 K, the films exhibited T_ce's of about 40 K. Recovery of the deteriorated films was carried out by two treatment methods. A pure oxygen treatment, where the deteriorated films were annealed at a temperature (T_sa) of 550C and an oxygen pressure (P_O₂) of 100 kPa for 60 min, and then naturally cooled, restored the films with T_ce's of about 60 K. An activated oxygen plasma (AOP) treatment, where the deteriorated films were exposed to oxygen plasma at a T_sa=550C for 40 min and subsequently oxygen gas was introduced into the chamber up to 2 kPa and then naturally cooled, restored the films with T_ce's of about 84 K. The AOP-treated film was recovered with a cooling rate of less than 6.8C/min, and exhibited T_ce of 90 K. The AOP-treated film took in oxygen more effectively than the pure oxygen-treated film with the cooling process at less than P_O₂=100 kPa.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e85-c_3_780/_p

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@ARTICLE{e85-c_3_780,
author={Hironori WAKANA, Masaki FUJIBAYASHI, Noriyoshi FUSHIMI, Osamu MICHIKAMI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Recovery Treatment for EuBa2Cu3O 7-δ Films with Insulating Multilayers},
year={2002},
volume={E85-C},
number={3},
pages={780-783},
abstract={By depositing insulating layers on oxide superconducting films, the films generally deteriorate. When an insulating multilayer of CeO₂(50 )SrTiO₃(200 ) was grown on 800--thick EuBa₂Cu₃O_7-δ(EBCO) films with T_ce's (T_c endpoint) above 90 K, the films exhibited T_ce's of about 40 K. Recovery of the deteriorated films was carried out by two treatment methods. A pure oxygen treatment, where the deteriorated films were annealed at a temperature (T_sa) of 550C and an oxygen pressure (P_O₂) of 100 kPa for 60 min, and then naturally cooled, restored the films with T_ce's of about 60 K. An activated oxygen plasma (AOP) treatment, where the deteriorated films were exposed to oxygen plasma at a T_sa=550C for 40 min and subsequently oxygen gas was introduced into the chamber up to 2 kPa and then naturally cooled, restored the films with T_ce's of about 84 K. The AOP-treated film was recovered with a cooling rate of less than 6.8C/min, and exhibited T_ce of 90 K. The AOP-treated film took in oxygen more effectively than the pure oxygen-treated film with the cooling process at less than P_O₂=100 kPa.},
keywords={},
doi={},
ISSN={},
month={March},}

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TY - JOUR
TI - Recovery Treatment for EuBa2Cu3O 7-δ Films with Insulating Multilayers
T2 - IEICE TRANSACTIONS on Electronics
SP - 780
EP - 783
AU - Hironori WAKANA
AU - Masaki FUJIBAYASHI
AU - Noriyoshi FUSHIMI
AU - Osamu MICHIKAMI
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E85-C
IS - 3
JA - IEICE TRANSACTIONS on Electronics
Y1 - March 2002
AB - By depositing insulating layers on oxide superconducting films, the films generally deteriorate. When an insulating multilayer of CeO₂(50 )SrTiO₃(200 ) was grown on 800--thick EuBa₂Cu₃O_7-δ(EBCO) films with T_ce's (T_c endpoint) above 90 K, the films exhibited T_ce's of about 40 K. Recovery of the deteriorated films was carried out by two treatment methods. A pure oxygen treatment, where the deteriorated films were annealed at a temperature (T_sa) of 550C and an oxygen pressure (P_O₂) of 100 kPa for 60 min, and then naturally cooled, restored the films with T_ce's of about 60 K. An activated oxygen plasma (AOP) treatment, where the deteriorated films were exposed to oxygen plasma at a T_sa=550C for 40 min and subsequently oxygen gas was introduced into the chamber up to 2 kPa and then naturally cooled, restored the films with T_ce's of about 84 K. The AOP-treated film was recovered with a cooling rate of less than 6.8C/min, and exhibited T_ce of 90 K. The AOP-treated film took in oxygen more effectively than the pure oxygen-treated film with the cooling process at less than P_O₂=100 kPa.
ER -

Recovery Treatment for EuBa₂Cu₃O_7-δ Films with Insulating Multilayers

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