DITCH-TYPED STEP-EDGE GRAIN-BOUNDARY JUNCTION AND RF SQUID

Authors
MA P WANG SZ WANG RF WANG SG LI JZ NIE RJ HU XD DAI YD
Citation
P. Ma et al., DITCH-TYPED STEP-EDGE GRAIN-BOUNDARY JUNCTION AND RF SQUID, Physica. C, Superconductivity, 282, 1997, pp. 2479-2480
Citations number
1
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
4
Pages
2479 - 2480
Database
ISI
SICI code
0921-4534(1997)282:<2479:DSGJAR>2.0.ZU;2-A
Abstract
Ditch-typed step-edge junctions and rf SQUIDs were fabricated from epi taxial YBa2Cu3O7 films on SrTiO3 substrates. The ditch on the substrat e was milled by Ar-ion, using YBCO film and photoresist as masks. The structure of the SQUIID is a planar square washer. The size of the out er washer and center hole is 9x9 mm(2) and 200x200 mu m(2) respectivel y. The voltage-flux modulation was clearly observed at a bias frequenc y of 150 MHz. At 77 K, a white flux noise of 4.0x10(-4) Phi(0)/Hz(1/2) and a field resolution of 480 fT/Hz(1/2) have been obtained at 5 Hz.