%0 Journal Article
%A Faley, Michael I.
%A Maslennikov, Yuri V.
%A Koshelets, Valery P.
%A Dunin-Borkowski, Rafal E.
%T Flip-Chip High-Tc DC SQUID Magnetometer With a Ferromagnetic Flux Antenna
%J IEEE transactions on applied superconductivity
%V 28
%N 4
%@ 1558-2515
%C New York, NY
%I IEEE
%M FZJ-2018-03364
%P 1 - 5
%D 2018
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000424685200001
%R 10.1109/TASC.2018.2791414
%U https://juser.fz-juelich.de/record/848081