High-T-c SQUID biomagnetometers
Artikel i vetenskaplig tidskrift, 2017

In this paper, we review the preparation technology, integration in measurement systems and tests of high-T-c superconducting quantum interference devices (SQUIDs) intended for biomagnetic applications. A focus is on developments specific to Forschungszentrum Julich GmbH, Chalmers University of Technology, MedTech West, and the University of Gothenburg, while placing these results in the perspective of those achieved elsewhere. Sensor fabrication, including the deposition and structuring of epitaxial oxide heterostructures, materials for substrates, epitaxial bilayer buffers, bicrystal and step-edge Josephson junctions, and multilayer flux transformers are detailed. The properties of the epitaxial multilayer high-T-c direct current SQUID sensors, including their integration in measurement systems with special electronics and liquid nitrogen cryostats, are presented in the context of biomagnetic recording. Applications that include magnetic nanoparticle based molecular diagnostics, magnetocardiography, and magnetoencephalography are presented as showcases of high-T-c biomagnetic systems. We conclude by outlining future challenges.


epitaxial heterostructures


high-T-c Josephson junctions

biomagnetic measurement systems

magnetic nanoparticles



M. I. Faley

Forschungszentrum Jülich

J. Dammers

Forschungszentrum Jülich

Y. V. Maslennikov

National Research University of Electronic Technology (MIET)

Justin Schneiderman

Göteborgs universitet

Dag Winkler

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

V. P. Koshelets

National Research University of Electronic Technology (MIET)

N. J. Shah

Forschungszentrum Jülich

R. E. Dunin-Borkowski

Forschungszentrum Jülich

Superconductor Science and Technology

0953-2048 (ISSN) 1361-6668 (eISSN)

Vol. 30 083001