Open AccessSoft-magnetic coatings as possible sensors for magnetic imaging of superconductors
Author(s) -
A. Ionescu,
Julian Simmendinger,
M. Bihler,
Cornelia Miksch,
Peer Fischer,
S. Soltan,
Gisela Schütz,
J. Albrecht
Publication year - 2019
Publication title -
superconductor science and technology/superconductor science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.033
H-Index - 105
eISSN - 1361-6668
pISSN - 0953-2048
DOI - 10.1088/1361-6668/ab5984
Subject(s) - magnetometer , superconductivity , materials science , condensed matter physics , squid , magnetic field , magnetic moment , magnet , ferromagnetism , magnetic nanoparticles , superconducting magnet , electromagnet , nuclear magnetic resonance , nanoparticle , nanotechnology , physics , ecology , quantum mechanics , biology
Magnetic imaging of superconductors typically requires a soft-magnetic material placed on top of the superconductor to probe local magnetic fields. For reasonable results the influence of the magnet onto the superconductor has to be small. Thin YBCO films with soft-magnetic coatings are investigated using SQUID magnetometry. Detailed measurements of the magnetic moment as a function of temperature, magnetic field and time have been performed for different heterostructures. It is found that the modification of the superconducting transport in these heterostructures strongly depends on the magnetic and structural properties of the soft-magnetic material. This effect is especially pronounced for an inhomogeneous coating consisting of ferromagnetic nanoparticles.