TY  - JOUR
AU  - Faley, Michael I.
AU  - Maslennikov, Yuri V.
AU  - Koshelets, Valery P.
AU  - Dunin-Borkowski, Rafal E.
TI  - Flip-Chip High-Tc DC SQUID Magnetometer With a Ferromagnetic Flux Antenna
JO  - IEEE transactions on applied superconductivity
VL  - 28
IS  - 4
SN  - 1558-2515
CY  - New York, NY
PB  - IEEE
M1  - FZJ-2018-03364
SP  - 1 - 5
PY  - 2018
AB  - We have combined a flip-chip high-Tc dc SQUID magnetometer with a ferromagnetic flux antenna made from 250 insulated 25-μm-thick stripes of amorphous soft magnetic Vitrovac 6025 foil inserted through the pick-up loop of the superconducting flux transformer. The ferromagnetic flux antenna provides improved magnetic coupling of the high-Tc SQUID to magnetic fields of ~0.4 nT/Φ0 to ~0.18 nT/Φ0. The orientation of the stripes was chosen to be normal to the foil tape rolling direction in order to minimize contributions from Barkhausen noise. A magnetic field resolution of ~2 fT/√Hz at 1 kHz and 77 K was achieved. Details of the technology and noise spectra of the novel composite high-Tc SQUID sensor are presented and their prospective applications for biomagnetic research and nondestructive evaluation are discussed.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000424685200001
DO  - DOI:10.1109/TASC.2018.2791414
UR  - https://juser.fz-juelich.de/record/848081
ER  -