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Guided nucleation of superconductivity on a graded magnetic substrate
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10.1063/1.3293300
/content/aip/journal/apl/96/3/10.1063/1.3293300
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/3/10.1063/1.3293300
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) A square lattice of magnetic dots with linearly increasing size on top of a superconducting film and an oxide layer. (b) The stray field of each dot may induce V-Av molecules in the superconductor (Ref. 6).

Image of FIG. 2.
FIG. 2.

The GL free energy of the superconducting state as a function of the magnetization of the magnetic dots (field-cooled regime). [(a)–(e)] Local magnetic field distribution in the sample for representative V-Av configurations (, 2, 4, 6, and 13 antivortices per row, respectively), and comparison with MD simulations [(f) and (g)].

Image of FIG. 3.
FIG. 3.

The evolution of the Cooper-pair condensate (and its energy) under the gradiated array of magnetic dots as a function of temperature (for ).

Image of FIG. 4.
FIG. 4.

The S/N phase boundary obtained by transport measurements, compared to the case of demagnetized dots and the theoretical data (for , , and ). The insets show the Cooper-pair density plots at values denoted by open dots.

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/content/aip/journal/apl/96/3/10.1063/1.3293300
2010-01-22
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Guided nucleation of superconductivity on a graded magnetic substrate
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/3/10.1063/1.3293300
10.1063/1.3293300
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