NDLI: Evidence for modification of the superconducting order parameter in YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// films by injection of a spin polarized current

Content Provider	IEEE Xplore Digital Library
Author	Chrisey, D.B. Osofsky, M.S. Horwitz, J.S. Soulen, R.J. Woodfield, B. Byers, J. Daly, G.M. Dorsey, P.C. Pond, J.M. Johnson, M. Auyeung, R.C.Y.
Copyright Year	2002
Abstract	We have deposited novel bilayer thin films of a ferromagnetic material and YBa/sub 2/Cu/sub 3/O/sub 7/ separated by a thin Au diffusion barrier to study the effects of a spin polarized nonequilibrium quasiparticle population on the superconducting order parameter. Thin films of YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//, Au, and Permalloy (Ni/sub 0.8/Fe/sub 0.2/) were deposited by pulsed laser deposition onto (100) MgO, SrTiO/sub 3/, or LaAlO/sub 3/ substrates. A thin stripe of YBa/sub 2/Cu/sub 3/,O/sub 7-/spl delta//, was patterned and two pairs of Au cross stripes for current and voltage contact were deposited at each end. Between these contacts a Permalloy and a Au cross stripe was also deposited to serve as the spin polarized and unpolarized quasiparticle injection sources, respectively. Utilizing this pseudo-three terminal device configuration we have in some samples measured reductions in the superconducting order parameter at the ferromagnet contact as compared to the normal metal contact. Details of this experiment, issues for optimized fabrication, and theoretical issues are discussed.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2067
Ending Page	2070
Page Count	4
File Size	601073
File Format	PDF
ISSN	10518223
Volume Number	7
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gold Superconducting thin films Sputtering Polarization Pulsed laser deposition Magnetic materials Superconducting materials Iron Optical pulses Voltage
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Pulsed laser deposition of YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta///BaTiO/sub 3//YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// multilayer structure on Si(100) substrates

Improved J/sub c/ of bilayer YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin film structures

Microwave characteristics of Ag-doped YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin films grown on MgO

Epitaxial YBa/sub 2/Cu/sub 3/O/sub 7- delta / thin films on LaMgAl/sub 11/O/sub 19/: new substrates with low dielectric losses

Ultrafast nonbolometric photoresponse of YBa/sub 2/Cu/sub 3/O/sub 7-x/ thin films

Deposition and characterization of Y/sub 1-x/Ca/sub x/Ba/sub 2/Cu/sub 3/O/sub 7-/spl delta// epitaxial thin films

YBa/sub 2/Cu/sub 3/O/sub 7/(-/spl delta/) a-axis films and planar junctions

Double-sided sputtering deposition of YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin films on 2 LaAlO/sub 3/ wafers for microwave applications

Direct-coupled high T/sub c/ DC SQUID gradiometer with single layer YBa/sub 2/Cu/sub 3/O/sub 7/

Evidence for modification of the superconducting order parameter in YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// films by injection of a spin polarized current

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