Proximity effect in superconducting-ferromagnetic granular structures

Hadar Greener, Victor Shelukhin, Michael Karpovski, Moshe Goldstein, Alexander Palevski

Research output: Contribution to journalArticlepeer-review

Abstract

We examined the proximity effect in granular films made of Pb, a superconductor, and Ni, a ferromagnet, with various compositions. Slow decay of the critical temperature as a function of the relative volume concentration of Ni per sample was demonstrated by our measurements, followed by a saturation of Tc. Using an approximate theoretical description of our granular system in terms of a layered one, we show that our data can only be reasonably fitted by a trilayer model. This indicates the importance of the interplay between different ferromagnetic grains, which should lead to triplet Cooper pairing.

Original languageEnglish
Article number014520
JournalPhysical Review B
Volume97
Issue number1
DOIs
StatePublished - 23 Jan 2018

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