Noise properties of high-T-c superconducting flux transformers fabricated using chemical-mechanical polishing
Artikel i vetenskaplig tidskrift, 2012

Reproducible high-temperature superconducting multilayer flux transformers were fabricated using chemical mechanical polishing. The measured magnetic field noise of the flip-chip magnetometer based on one such flux transformer with a 9 x 9 mm(2) pickup loop coupled to a bicrystal dc SQUID was 15 fT/Hz(1/2) above 2 kHz. We present an investigation of excess 1/f noise observed at low frequencies and its relationship with the microstructure of the interlayer connections within the flux transformer. The developed high-T-c SQUID magnetometers may be advantageous in ultra-low field magnetic resonance imaging and, with improved low frequency noise, magnetoencephalography applications.

magnetometers

magnetic-resonance

gradiometers

yba2cu3o7-x

josephson-junctions

planarization

brain

device

Författare

Maxim Chukharkin Leonidovich

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Alexei Kalaboukhov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Justin Schneiderman

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Fredrik Öisjöen

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

O. Snigirev

Moscow State University

Zonghe Lai

Chalmers, Mikroteknologi och nanovetenskap (MC2), Nanotekniklaboratoriet

Dag Winkler

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 101 4 Article Number: 042602 - 042602

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1063/1.4738782

Mer information

Senast uppdaterat

2018-06-12