High tcsuperconducting multilayers for squid magnetometers

John Clarke; J. J. Kingston; A. H. Miklich; F. C. Wellstood; K. Char; M. S. Colclough; L. P. Lee; G. Zaharchuk

doi:10.1088/0031-8949/1992/T42/010

High t_csuperconducting multilayers for squid magnetometers

John Clarke, J. J. Kingston, A. H. Miklich, F. C. Wellstood, K. Char, M. S. Colclough, L. P. Lee, G. Zaharchuk

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

Abstract

Thin-film multilayers of YBajCujO (YBCO) and insulating materials such as SrTi0₃, MgO and Ce0₂are grown in situ by laser deposition. Appropriate multilayers are used to produce bi-epitaxial grain boundary Josephson junctions, insulating crossovers -two overlapping YBCO films with an intervening inulating film, and superconducting vias -a superconducting connection between the two YBCO films via a window in the insulator. The bi-epitaxial junctions are incorporated in d.c. SQUIDs (Superconducting QUantum Interference Devices), and the crossovers and vias enable one to fabricate superconducting, multiturn flux transformers. Coupled together, the SQUID and flux transformer form a magnetometer that, operating in liquid nitrogen, has achieved a sensitivity of 0.6pT H^-1/.2at 10Hz. We have used such a magnetometer to obtain magnetocardiograms.

Original language	English
Pages (from-to)	51-56
Number of pages	6
Journal	Physica Scripta
Volume	1992
Issue number	T42
DOIs	https://doi.org/10.1088/0031-8949/1992/T42/010
State	Published - 1 Jan 1992

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title = "High tcsuperconducting multilayers for squid magnetometers",

abstract = "Thin-film multilayers of YBajCujO (YBCO) and insulating materials such as SrTi03, MgO and Ce02are grown in situ by laser deposition. Appropriate multilayers are used to produce bi-epitaxial grain boundary Josephson junctions, insulating crossovers -two overlapping YBCO films with an intervening inulating film, and superconducting vias -a superconducting connection between the two YBCO films via a window in the insulator. The bi-epitaxial junctions are incorporated in d.c. SQUIDs (Superconducting QUantum Interference Devices), and the crossovers and vias enable one to fabricate superconducting, multiturn flux transformers. Coupled together, the SQUID and flux transformer form a magnetometer that, operating in liquid nitrogen, has achieved a sensitivity of 0.6pT H-1/.2at 10Hz. We have used such a magnetometer to obtain magnetocardiograms.",

author = "John Clarke and Kingston, {J. J.} and Miklich, {A. H.} and Wellstood, {F. C.} and K. Char and Colclough, {M. S.} and Lee, {L. P.} and G. Zaharchuk",

year = "1992",

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doi = "10.1088/0031-8949/1992/T42/010",

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T1 - High tcsuperconducting multilayers for squid magnetometers

AU - Clarke, John

AU - Kingston, J. J.

AU - Miklich, A. H.

AU - Wellstood, F. C.

AU - Char, K.

AU - Colclough, M. S.

AU - Lee, L. P.

AU - Zaharchuk, G.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - Thin-film multilayers of YBajCujO (YBCO) and insulating materials such as SrTi03, MgO and Ce02are grown in situ by laser deposition. Appropriate multilayers are used to produce bi-epitaxial grain boundary Josephson junctions, insulating crossovers -two overlapping YBCO films with an intervening inulating film, and superconducting vias -a superconducting connection between the two YBCO films via a window in the insulator. The bi-epitaxial junctions are incorporated in d.c. SQUIDs (Superconducting QUantum Interference Devices), and the crossovers and vias enable one to fabricate superconducting, multiturn flux transformers. Coupled together, the SQUID and flux transformer form a magnetometer that, operating in liquid nitrogen, has achieved a sensitivity of 0.6pT H-1/.2at 10Hz. We have used such a magnetometer to obtain magnetocardiograms.

AB - Thin-film multilayers of YBajCujO (YBCO) and insulating materials such as SrTi03, MgO and Ce02are grown in situ by laser deposition. Appropriate multilayers are used to produce bi-epitaxial grain boundary Josephson junctions, insulating crossovers -two overlapping YBCO films with an intervening inulating film, and superconducting vias -a superconducting connection between the two YBCO films via a window in the insulator. The bi-epitaxial junctions are incorporated in d.c. SQUIDs (Superconducting QUantum Interference Devices), and the crossovers and vias enable one to fabricate superconducting, multiturn flux transformers. Coupled together, the SQUID and flux transformer form a magnetometer that, operating in liquid nitrogen, has achieved a sensitivity of 0.6pT H-1/.2at 10Hz. We have used such a magnetometer to obtain magnetocardiograms.

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EP - 56

JO - Physica Scripta

JF - Physica Scripta

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High tcsuperconducting multilayers for squid magnetometers

Abstract

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High t_csuperconducting multilayers for squid magnetometers