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Article overview
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Tailoring phase slip events through magnetic doping in superconductor-ferromagnet composite films | | Ambika Bawa
; Rajveer Jha
; Sangeeta Sahoo
; | | Date: |
25 Aug 2015 | | Abstract: | The interplay between superconductivity (SC) and ferromagnetism (FM) when
embedded together has attracted unprecedented research interest due to very
rare coexistence of these two phenomena. The focus has been mainly put into the
proximity induced effects like, coexistence of magnetism and superconductivity,
higher critical current, triplet superconductivity etc. However, very little
attention has been paid experimentally to the role of magnetic constituent on
triggering phase slip processes in the composite films (CFs). We demonstrate
that less than 1 at. % of magnetic contribution in the CFs can initiate phase
slip events efficiently. Due to advanced state-of-the-art fabrication
techniques, phase slip based studies have been concentrated mainly on
superconducting nanostructures. Here, we employ wide mesoscopic NbGd based CFs
to study the phase slip processes. Low temperature current-voltage
characteristics (IVCs) of CFs show stair-like features originated through phase
slip events and are absent in pure SC films. Depending on the bias current and
temperature, distinct regions, dominated by Abrikosov type vortex-antivortex
(v-av) pairs and phase slip events, are observed. The results presented here
open a new way to study the phase slip mechanism, its interaction with v-av
pairs in two dimensions and hence can be useful for future photonic and
metrological applications | | Source: | arXiv, 1508.6097 | | Services: | Forum | Review | PDF | Favorites | |
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