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Applied Physics Letters / Volume 96 / Issue 9 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 96, 092513 (2010); http://dx.doi.org/10.1063/1.3352079 (3 pages)

Giant conductance anisotropy in magnetically coupled Ferromagnet-Superconductor-Ferromagnet structures

A. Belkin1,2, V. Novosad1, M. Iavarone1,3, R. Divan4, J. Hiller1, T. Proslier1, J. E. Pearson1, and G. Karapetrov1

1Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
2Physics Division, Illinois Institute of Technology, Chicago, Illinois 60616, USA
3Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA
4Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA

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(Received 10 November 2009; accepted 12 February 2010; published online 5 March 2010)

We demonstrate the evolution of the anisotropic conductivity in the superconductor that is magnetically coupled with two adjacent ferromagnetic layers. Stripe magnetic domain structure in the ferromagnetic layers results in directional superconducting order parameter in the superconducting layer. The conductance anisotropy strongly depends on the period of the magnetic domains and the strength of the local magnetization. The anisotropic conductivity of up to three orders of magnitude can be achieved with spatial critical temperature modulation of 5% of Tc. The effect could be exploited in low temperature nonvolatile logic and storage elements.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

ferromagnetic materials, magnetic anisotropy, magnetic domains, magnetic superconductors, superconducting transition temperature

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3352079

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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