Evaluating the entry of vortices into a slotted high-Tc SQUID magnetometer with a double-pickup-coil configuration

K. Yokosawa; H. Oyama; S. Kuriki; D. Suzuki; K. Tsukada

doi:10.1016/S0921-4534(00)01387-3

Evaluating the entry of vortices into a slotted high-Tc SQUID magnetometer with a double-pickup-coil configuration

K. Yokosawa, H. Oyama, S. Kuriki, D. Suzuki, K. Tsukada

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

2 Citations (Scopus)

Abstract

A direct-coupling-type high-Tc SQUID magnetometer with two pickup loops per SQUID on a substrate has been fabricated. To suppress the flux trapping and vortex entry, the superconducting film of the whole device except a 5-μm-wide transmission-line-shaped SQUID is composed of narrow (5 μm) lines with slots and holes. The threshold field for the flux trapping during field cooling was evaluated to be around 130 μT, a much larger field than the geomagnetic field. Moreover, applying a field after cooling reduced the critical current of the SQUID to zero at 6 μT. And vortex entry into the pickup loop occurred at a field exceeding about 10 μT.

Original language	English
Pages (from-to)	2705-2706
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	341-348 (IV)
DOIs	https://doi.org/10.1016/S0921-4534(00)01387-3
Publication status	Published - Nov 2000
Externally published	Yes
Event	International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA Duration: Feb 20 2000 → Feb 25 2000

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(00)01387-3

Cite this

@article{b11f9960a69647dd8c4518854f20abcf,

title = "Evaluating the entry of vortices into a slotted high-Tc SQUID magnetometer with a double-pickup-coil configuration",

abstract = "A direct-coupling-type high-Tc SQUID magnetometer with two pickup loops per SQUID on a substrate has been fabricated. To suppress the flux trapping and vortex entry, the superconducting film of the whole device except a 5-μm-wide transmission-line-shaped SQUID is composed of narrow (5 μm) lines with slots and holes. The threshold field for the flux trapping during field cooling was evaluated to be around 130 μT, a much larger field than the geomagnetic field. Moreover, applying a field after cooling reduced the critical current of the SQUID to zero at 6 μT. And vortex entry into the pickup loop occurred at a field exceeding about 10 μT.",

author = "K. Yokosawa and H. Oyama and S. Kuriki and D. Suzuki and K. Tsukada",

year = "2000",

month = nov,

doi = "10.1016/S0921-4534(00)01387-3",

language = "English",

volume = "341-348 (IV)",

pages = "2705--2706",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

note = "International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI ; Conference date: 20-02-2000 Through 25-02-2000",

}

TY - JOUR

T1 - Evaluating the entry of vortices into a slotted high-Tc SQUID magnetometer with a double-pickup-coil configuration

AU - Yokosawa, K.

AU - Oyama, H.

AU - Kuriki, S.

AU - Suzuki, D.

AU - Tsukada, K.

PY - 2000/11

Y1 - 2000/11

N2 - A direct-coupling-type high-Tc SQUID magnetometer with two pickup loops per SQUID on a substrate has been fabricated. To suppress the flux trapping and vortex entry, the superconducting film of the whole device except a 5-μm-wide transmission-line-shaped SQUID is composed of narrow (5 μm) lines with slots and holes. The threshold field for the flux trapping during field cooling was evaluated to be around 130 μT, a much larger field than the geomagnetic field. Moreover, applying a field after cooling reduced the critical current of the SQUID to zero at 6 μT. And vortex entry into the pickup loop occurred at a field exceeding about 10 μT.

AB - A direct-coupling-type high-Tc SQUID magnetometer with two pickup loops per SQUID on a substrate has been fabricated. To suppress the flux trapping and vortex entry, the superconducting film of the whole device except a 5-μm-wide transmission-line-shaped SQUID is composed of narrow (5 μm) lines with slots and holes. The threshold field for the flux trapping during field cooling was evaluated to be around 130 μT, a much larger field than the geomagnetic field. Moreover, applying a field after cooling reduced the critical current of the SQUID to zero at 6 μT. And vortex entry into the pickup loop occurred at a field exceeding about 10 μT.

UR - http://www.scopus.com/inward/record.url?scp=0342527771&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0342527771&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(00)01387-3

DO - 10.1016/S0921-4534(00)01387-3

M3 - Conference article

AN - SCOPUS:0342527771

SN - 0921-4534

VL - 341-348 (IV)

SP - 2705

EP - 2706

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

T2 - International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI

Y2 - 20 February 2000 through 25 February 2000

ER -

Evaluating the entry of vortices into a slotted high-Tc SQUID magnetometer with a double-pickup-coil configuration

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this