Adjustable Superconducting Anisotropy in Superconductor-Ferromagnet Bilayers

Author

Karapetrov, Goran ; Belkin, Andrey ; Novosad, Valentyn ; Iavarone, Maria ; Fedor, Jan ; Pearson, John E. ; Petrean-Troncalli, Andra

Author_Institution

Mater. Sci. Div., Argonne Nat. Lab., Argonne, IL, USA

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3471

Lastpage

3474

Abstract

We demonstrate novel magneto-transport properties of magnetically coupled superconductor-ferromagnet (MoGe/Permalloy) bilayers. Ferromagnetic Permalloy film exhibiting stripe domains with rotatable anisotropy induces modulation of the order parameter in the superconducting thin film. Domain-wall superconductivity is localized above the magnetic domain walls forming mesoscopic superfluid channels. We can achieve non-volatile re-configuration of the in-plane direction of the superconducting channels by changing the orientation of the stripe domains in the Permalloy. We discuss the influence of magnetic domain structure on Abrikosov vortex dynamics in this system.

Keywords

Permalloy; ferromagnetic materials; galvanomagnetic effects; germanium alloys; magnetic anisotropy; magnetic domain walls; magnetic thin films; molybdenum alloys; superconducting materials; superconducting thin films; Abrikosov vortex dynamics; MoGe-NiFe; domain-wall superconductivity; ferromagnetic permalloy film; magnetic domain walls; mesoscopic superfluid channels; nonvolatile reconfiguration; stripe domains; superconducting anisotropy; superconducting thin film; superconductor-ferromagnet bilayers; Permalloy films; superconducting films; superconducting switches; superconductor-ferromagnet hybrids;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018824

Filename

5153262