Details

Autor(en) / Beteiligte

• Koelle, D.
• Miklich, A.H.
• Ludwig, F.
• Dantsker, E.
• Nemeth, D.T.
• Clarke, J.

Titel

Dc SQUID magnetometers from single layers of YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]]

Ist Teil von

• Applied physics letters, 1993-10, Vol.63:16

Ort / Verlag

United States

Erscheinungsjahr

1993

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We have fabricated magnetometers patterned in a single layer of YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]] involving dc superconducting quantum interference devices (SQUIDs) with bicrystalline grain boundary junctions. The magnetometers consist of either a SQUID with a large area square washer or a single turn pickup loop coupled directly to the body of a small area SQUID. We found that the transfer function falls off with increasing SQUID inductance much more rapidly than predicted; implications for magnetometer performance are discussed. When operated at 77 K with a bias reversal technique a directly coupled magnetometer had a noise of (105[plus minus]10) fT Hz[sup [minus]1/2] at 1 kHz, increasing to (145[plus minus]10) fT Hz[sup [minus]1/2] at 1 Hz.