Skip to Main content Skip to Navigation
Preprints, Working Papers, ...

Penetration depth of Cooper pairs in the IrMn antiferromagnet

Abstract : Suppression of superconductivity due to the proximity effect between a superconductor and a ferromagnet can be partially alleviated when a Cooper pair simultaneously samples different directions of the short-range exchange field. The superconductor's critical temperature, TC, is therefore expected to partially recover when the ferromagnet is in a multi-domain state, as opposed to a single-domain state. Here, we discuss series of experiments performed with ferromagnet(Pt/Co)/spacer(IrMn and Pt)/superconductor(NbN) heterostructures. By tuning the various parameters in play, e.g., superconducting coherence length-to-thicknesses ratio, and domain sizes, we obtained up to 10% recovery of the superconducting critical temperature ΔTC/TC. This large-scale recovery made novel investigations possible. In particular, from the spacer thickness-dependence of ΔTC/TC, it was possible to deduce the characteristic length for Cooper pair penetration in an IrMn antiferromagnet. This information is crucial for electronic transport, and up to now has been difficult to access experimentally for antiferromagnets.
Document type :
Preprints, Working Papers, ...
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03133353
Contributor : Vincent Baltz <>
Submitted on : Friday, February 5, 2021 - 10:46:44 PM
Last modification on : Wednesday, April 7, 2021 - 11:34:29 AM

File

arXiv.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-03133353, version 1

Collections

Citation

R. L. Seeger, G Forestier, O Gladii, M Leiviskä, S Auffret, et al.. Penetration depth of Cooper pairs in the IrMn antiferromagnet. 2021. ⟨hal-03133353⟩

Share

Metrics

Record views

77

Files downloads

25