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The Path to Type-II Superconductivity
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Magnetic Recording of Superconducting States

Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium
SUPRATECS group, Montefiore Research Unit, Department of Electrical Engineering and Computer Science, Université de Liège, 4000 Sart Tilman, Belgium
Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, Brazil
IFSP—Instituto Federal de São Paulo, Campus São Carlos, 13.565-905 São Carlos, Brazil
CNRS, Institut Néel, University Grenoble Alpes, 38000 Grenoble, France
Centre Spatial de Liège (CSL), STAR Research Unit, Université de Liège, Liège Science Park, B-4031 Angleur, Belgium
Author to whom correspondence should be addressed.
Current address: School of Applied Sciences (Physics), Kalinga Institute of Industrial Technology (Deemed to be University), Bhubaneswar, 751024 Odisha, India.
These authors contributed equally to this work.
Metals 2019, 9(10), 1022;
Received: 20 August 2019 / Revised: 14 September 2019 / Accepted: 16 September 2019 / Published: 20 September 2019
(This article belongs to the Special Issue Metallic Superconductors - The Workhorses of Superconductivity)
Local polarization of magnetic materials has become a well-known and widely used method for storing binary information. Numerous applications in our daily life such as credit cards, computer hard drives, and the popular magnetic drawing board toy, rely on this principle. In this work, we review the recent advances on the magnetic recording of inhomogeneous magnetic landscapes produced by superconducting films. We summarize the current compelling experimental evidence showing that magnetic recording can be applied for imprinting in a soft magnetic layer the flux trajectory taking place in a superconducting layer at cryogenic temperatures. This approach enables the ex-situ observation at room temperature of the imprinted magnetic flux landscape obtained below the critical temperature of the superconducting state. The undeniable appeal of the proposed technique lies in its simplicity and the potential to improve the spatial resolution, possibly down to the scale of a few vortices. View Full-Text
Keywords: superconductor-ferromagnet hybrids; magnetic tweezers; superconducting devices superconductor-ferromagnet hybrids; magnetic tweezers; superconducting devices
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MDPI and ACS Style

Shaw, G.; Blanco Alvarez, S.; Brisbois, J.; Burger, L.; Pinheiro, L.B.L.G.; Kramer, R.B.G.; Motta, M.; Fleury-Frenette, K.; Ortiz, W.A.; Vanderheyden, B.; Silhanek, A.V. Magnetic Recording of Superconducting States. Metals 2019, 9, 1022.

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