Thermally-Activated Flux Entry into a Pickup Coil through a Flux Dam in High Tc SQUID Magnetometers
Summary :
Thermally activated magnetic-flux entry into a pickup coil through a flux dam in high Tc superconducting quantum interference device (SQUID) is studied. The behavior of this thermal activation is analyzed in terms of the circulating current flowing in the pickup coil. It is shown that the thermal activation can be prevented when the circulating current becomes much below a critical current of the flux dam. It is also shown that we need a long waiting time in order to realize this situation since the circulating current logarithmically decays with time in the case of the thermal activation. The relationship between the thermal activation and the circulating current is qualitatively confirmed with the experiment. We also show a method in order to forcibly reduce the circulating current instead of the thermal activation. In this case, we can prevent the thermal activation without the long waiting time.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E85-C No.3 pp.681-686
- Publication Date
- 2002/03/01
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section PAPER (Special Issue on Superconductive Electronics)
- Category
- SQUIDs and Their Applications
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Keyword
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Keiji ENPUKU, Daishi TOKIMIZU, Daisuke KURODA, Shintaro HIJIYA, "Thermally-Activated Flux Entry into a Pickup Coil through a Flux Dam in High Tc SQUID Magnetometers" in IEICE TRANSACTIONS on Electronics,
vol. E85-C, no. 3, pp. 681-686, March 2002, doi: .
Abstract: Thermally activated magnetic-flux entry into a pickup coil through a flux dam in high Tc superconducting quantum interference device (SQUID) is studied. The behavior of this thermal activation is analyzed in terms of the circulating current flowing in the pickup coil. It is shown that the thermal activation can be prevented when the circulating current becomes much below a critical current of the flux dam. It is also shown that we need a long waiting time in order to realize this situation since the circulating current logarithmically decays with time in the case of the thermal activation. The relationship between the thermal activation and the circulating current is qualitatively confirmed with the experiment. We also show a method in order to forcibly reduce the circulating current instead of the thermal activation. In this case, we can prevent the thermal activation without the long waiting time.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e85-c_3_681/_p
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@ARTICLE{e85-c_3_681,
author={Keiji ENPUKU, Daishi TOKIMIZU, Daisuke KURODA, Shintaro HIJIYA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Thermally-Activated Flux Entry into a Pickup Coil through a Flux Dam in High Tc SQUID Magnetometers},
year={2002},
volume={E85-C},
number={3},
pages={681-686},
abstract={Thermally activated magnetic-flux entry into a pickup coil through a flux dam in high Tc superconducting quantum interference device (SQUID) is studied. The behavior of this thermal activation is analyzed in terms of the circulating current flowing in the pickup coil. It is shown that the thermal activation can be prevented when the circulating current becomes much below a critical current of the flux dam. It is also shown that we need a long waiting time in order to realize this situation since the circulating current logarithmically decays with time in the case of the thermal activation. The relationship between the thermal activation and the circulating current is qualitatively confirmed with the experiment. We also show a method in order to forcibly reduce the circulating current instead of the thermal activation. In this case, we can prevent the thermal activation without the long waiting time.},
keywords={},
doi={},
ISSN={},
month={March},}
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TY - JOUR
TI - Thermally-Activated Flux Entry into a Pickup Coil through a Flux Dam in High Tc SQUID Magnetometers
T2 - IEICE TRANSACTIONS on Electronics
SP - 681
EP - 686
AU - Keiji ENPUKU
AU - Daishi TOKIMIZU
AU - Daisuke KURODA
AU - Shintaro HIJIYA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E85-C
IS - 3
JA - IEICE TRANSACTIONS on Electronics
Y1 - March 2002
AB - Thermally activated magnetic-flux entry into a pickup coil through a flux dam in high Tc superconducting quantum interference device (SQUID) is studied. The behavior of this thermal activation is analyzed in terms of the circulating current flowing in the pickup coil. It is shown that the thermal activation can be prevented when the circulating current becomes much below a critical current of the flux dam. It is also shown that we need a long waiting time in order to realize this situation since the circulating current logarithmically decays with time in the case of the thermal activation. The relationship between the thermal activation and the circulating current is qualitatively confirmed with the experiment. We also show a method in order to forcibly reduce the circulating current instead of the thermal activation. In this case, we can prevent the thermal activation without the long waiting time.
ER -
English
