Visualizing domain wall and reverse domain superconductivity
- Temple Univ., Philadelphia, PA (United States); Temple University
- Temple Univ., Philadelphia, PA (United States)
- Slovak Academy of Sciences, Bratislava (Slovakia); Temple Univ., Philadelphia, PA (United States)
- Drexel Univ., Philadelphia, PA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
In magnetically coupled, planar ferromagnet-superconductor (F/S) hybrid structures, magnetic domain walls can be used to spatially confine the superconductivity. In contrast to a superconductor in a uniform applied magnetic field, the nucleation of the superconducting order parameter in F/S structures is governed by the inhomogeneous magnetic field distribution. The interplay between the superconductivity localized at the domain walls and far from the walls leads to effects such as re-entrant superconductivity and reverse domain superconductivity with the critical temperature depending upon the location. Here we use scanning tunnelling spectroscopy to directly image the nucleation of superconductivity at the domain wall in F/S structures realized with Co-Pd multilayers and Pb thin films. Our results demonstrate that such F/S structures are attractive model systems that offer the possibility to control the strength and the location of the superconducting nucleus by applying an external magnetic field, potentially useful to guide vortices for computing application.
- Research Organization:
- Temple Univ., Philadelphia, PA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- SC0004556; AC02-06CH11357
- OSTI ID:
- 1735327
- Alternate ID(s):
- OSTI ID: 1356626
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 5; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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