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Observation of Andreev–Saint-James reflections in nano-scale planar superconductor to ferromagnet contacts
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10.1063/1.2909565
/content/aip/journal/apl/92/15/10.1063/1.2909565
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/15/10.1063/1.2909565
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Resistance as function of temperature for J13. Inset: schematic illustration of the nonequilibrium region of the junction. and represent the position of the voltage probes on each side of the junction. The resistance shown is the voltage difference divided by the current. The quasiparticles electrochemical potential relaxes over the characteristic length scale. At , the characteristic length scale changes from to and, thus, an extra voltage is measured near the phase transition.

Image of FIG. 2.
FIG. 2.

Normalized differential conductance for J13 (circles) with fit (line). The low bias part can be fitted to a model (Ref. 9) treating ASJ reflections having different transmission coefficients for the majority and minority spin bands. The polarization .

Image of FIG. 3.
FIG. 3.

Development of the differential conductance curves as a function of temperature. The arrows indicate the high bias dips due to the pinhole critical current. .

Image of FIG. 4.
FIG. 4.

Temperature dependance of the pinhole critical current for J13. is proportional to the critical current and is defined as the voltage where the differential conductance intersects the normal state conductance. The line is a BCS gap temperature dependance.

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/content/aip/journal/apl/92/15/10.1063/1.2909565
2008-04-15
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Observation of Andreev–Saint-James reflections in nano-scale planar superconductor to ferromagnet contacts
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/15/10.1063/1.2909565
10.1063/1.2909565
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