Highly balanced long-baseline single-layer high-T-c superconducting quantum interference device gradiometer

Authors
Eulenburg, A Romans, EJ Carr, C Millar, AJ Donaldson, GB Pegrum, CM
Citation
A. Eulenburg et al., Highly balanced long-baseline single-layer high-T-c superconducting quantum interference device gradiometer, APPL PHYS L, 75(15), 1999, pp. 2301-2303
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
75
Issue
15
Year of publication
1999
Pages
2301 - 2303
Database
ISI
SICI code
0003-6951(19991011)75:15<2301:HBLSHS>2.0.ZU;2-4
Abstract
We describe a direct-current superconducting quantum interference device (S QUID) first-order gradiometer fabricated from a single layer of YBa2Cu3O7 o n a 30 x 10 mm(2) bicrystal substrate. The device has a baseline of 13 mm a nd an intrinsic balance of similar to 10(-3). The gradient sensitivity at 7 7 K and 1 kHz is 50 fT/(cm root Hz) in magnetic shielding and 260 fT/(cm ro ot Hz) when operated unshielded in our laboratory. An antiparallel two-SQUI D coupling scheme is employed to optimize the device's balance to at least 3 x 10(-5). (C) 1999 American Institute of Physics. [S0003-6951(99)01641-1] .