Flux Modulation Enhancement of dc-SQUID Based on Intrinsic Josephson Junctions Made of Bi2Sr2CaCuO8+δ Thin Films

Kensuke NAKAJIMA; Hironobu YAMADA; Mihoko TAKEDA

doi:10.1587/transele.2022SEI0003

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Flux Modulation Enhancement of dc-SQUID Based on Intrinsic Josephson Junctions Made of Bi₂Sr₂CaCuO_8+δ Thin Films

Kensuke NAKAJIMA, Hironobu YAMADA, Mihoko TAKEDA

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Summary :

Direct-current superconducting quantum interference device (dc-SQUID) based on intrinsic Josephson junction (IJJ) has been fabricated using Bi₂Sr₂CaCu₂O_8+δ (Bi-2212) films grown on MgO substrates with surface steps. The superconducting loop parallel to the film surface across the step edge contains two IJJ stacks along the edge. The number of crystallographically stacked IJJ for each SQUIDs were 40, 18 and 3. Those IJJ SQUIDs except for one with 40 stacked IJJs revealed clear periodic modulation of the critical current for the flux quanta through the loops. It is anticipated that phase locking of IJJ has an effect on the modulation depth of the IJJ dc-SQUID.

Publication: IEICE TRANSACTIONS on Electronics Vol.E106-C No.6 pp.289-292

Publication Date: 2023/06/01

Publicized: 2022/11/29

Online ISSN: 1745-1353

DOI: 10.1587/transele.2022SEI0003

Type of Manuscript: Special Section INVITED PAPER (Special Section on Recent Progress in Physics and Applications of Intrinsic Josephson Junctions)

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Authors

Kensuke NAKAJIMA
  Graduate School of Yamagata University
Hironobu YAMADA
  Graduate School of Yamagata University
Mihoko TAKEDA
  Yamagata University

Keyword

SQUID, intrinsic Josephson junction, phase locking, thin film

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Kensuke NAKAJIMA, Hironobu YAMADA, Mihoko TAKEDA, "Flux Modulation Enhancement of dc-SQUID Based on Intrinsic Josephson Junctions Made of Bi2Sr2CaCuO8+δ Thin Films" in IEICE TRANSACTIONS on Electronics, vol. E106-C, no. 6, pp. 289-292, June 2023, doi: 10.1587/transele.2022SEI0003.
Abstract: Direct-current superconducting quantum interference device (dc-SQUID) based on intrinsic Josephson junction (IJJ) has been fabricated using Bi₂Sr₂CaCu₂O_8+δ (Bi-2212) films grown on MgO substrates with surface steps. The superconducting loop parallel to the film surface across the step edge contains two IJJ stacks along the edge. The number of crystallographically stacked IJJ for each SQUIDs were 40, 18 and 3. Those IJJ SQUIDs except for one with 40 stacked IJJs revealed clear periodic modulation of the critical current for the flux quanta through the loops. It is anticipated that phase locking of IJJ has an effect on the modulation depth of the IJJ dc-SQUID.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.2022SEI0003/_p

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@ARTICLE{e106-c_6_289,
author={Kensuke NAKAJIMA, Hironobu YAMADA, Mihoko TAKEDA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Flux Modulation Enhancement of dc-SQUID Based on Intrinsic Josephson Junctions Made of Bi2Sr2CaCuO8+δ Thin Films},
year={2023},
volume={E106-C},
number={6},
pages={289-292},
abstract={Direct-current superconducting quantum interference device (dc-SQUID) based on intrinsic Josephson junction (IJJ) has been fabricated using Bi₂Sr₂CaCu₂O_8+δ (Bi-2212) films grown on MgO substrates with surface steps. The superconducting loop parallel to the film surface across the step edge contains two IJJ stacks along the edge. The number of crystallographically stacked IJJ for each SQUIDs were 40, 18 and 3. Those IJJ SQUIDs except for one with 40 stacked IJJs revealed clear periodic modulation of the critical current for the flux quanta through the loops. It is anticipated that phase locking of IJJ has an effect on the modulation depth of the IJJ dc-SQUID.},
keywords={},
doi={10.1587/transele.2022SEI0003},
ISSN={1745-1353},
month={June},}

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TY - JOUR
TI - Flux Modulation Enhancement of dc-SQUID Based on Intrinsic Josephson Junctions Made of Bi2Sr2CaCuO8+δ Thin Films
T2 - IEICE TRANSACTIONS on Electronics
SP - 289
EP - 292
AU - Kensuke NAKAJIMA
AU - Hironobu YAMADA
AU - Mihoko TAKEDA
PY - 2023
DO - 10.1587/transele.2022SEI0003
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E106-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2023
AB - Direct-current superconducting quantum interference device (dc-SQUID) based on intrinsic Josephson junction (IJJ) has been fabricated using Bi₂Sr₂CaCu₂O_8+δ (Bi-2212) films grown on MgO substrates with surface steps. The superconducting loop parallel to the film surface across the step edge contains two IJJ stacks along the edge. The number of crystallographically stacked IJJ for each SQUIDs were 40, 18 and 3. Those IJJ SQUIDs except for one with 40 stacked IJJs revealed clear periodic modulation of the critical current for the flux quanta through the loops. It is anticipated that phase locking of IJJ has an effect on the modulation depth of the IJJ dc-SQUID.
ER -