Proximity and Josephson effects in superconductor/antiferromagnetic Nb/gamma-Fe50Mn50 heterostructures

C Bell; EJ Tarte; G Burnell; CW Leung; DJ Kang; MG Blamire; Chris Bell

doi:10.1103/PhysRevB.68.144517

Proximity and Josephson effects in superconductor/antiferromagnetic Nb/gamma-Fe50Mn50 heterostructures

C Bell^*, EJ Tarte, G Burnell, CW Leung, DJ Kang, MG Blamire, Chris Bell

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

45 Citations (Scopus)

Abstract

We study the proximity effect in superconductor (S), antiferromagnetic (AF) bilayers, and report the fabrication and measurement of the first trilayer S/AF/S Josephson junctions. The disordered fcc alloy gamma-Fe50Mn50 was used as the AF, and the S is Nb. Micron and submicron scale junctions were measured, and the scaling of J(C)(d(AF)) gives a coherence length in the AF of 2.4 nm, which correlates with the coherence length due to suppression of T-C in the bilayer samples. The diffusion constant for FeMn was found to be 1.7x10(-4) m(2) s(-1), and the density of states at the Fermi level was also obtained. An exchange biased FeMn/Co bilayer confirms the AF nature of the FeMn in this thickness regime.

Original language	English
Article number	144517
Number of pages	5
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	68
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.68.144517
Publication status	Published - 1 Oct 2003

Keywords

SNS JUNCTIONS
FILMS
SUPERCONDUCTIVITY
FERROMAGNET
MULTILAYERS
DEPENDENCE
THICKNESS
FIELD

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@article{3080c98343964b22b37363191364c5d4,

title = "Proximity and Josephson effects in superconductor/antiferromagnetic Nb/gamma-Fe50Mn50 heterostructures",

abstract = "We study the proximity effect in superconductor (S), antiferromagnetic (AF) bilayers, and report the fabrication and measurement of the first trilayer S/AF/S Josephson junctions. The disordered fcc alloy gamma-Fe50Mn50 was used as the AF, and the S is Nb. Micron and submicron scale junctions were measured, and the scaling of J(C)(d(AF)) gives a coherence length in the AF of 2.4 nm, which correlates with the coherence length due to suppression of T-C in the bilayer samples. The diffusion constant for FeMn was found to be 1.7x10(-4) m(2) s(-1), and the density of states at the Fermi level was also obtained. An exchange biased FeMn/Co bilayer confirms the AF nature of the FeMn in this thickness regime.",

keywords = "SNS JUNCTIONS, FILMS, SUPERCONDUCTIVITY, FERROMAGNET, MULTILAYERS, DEPENDENCE, THICKNESS, FIELD",

author = "C Bell and EJ Tarte and G Burnell and CW Leung and DJ Kang and MG Blamire and Chris Bell",

year = "2003",

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doi = "10.1103/PhysRevB.68.144517",

language = "English",

volume = "68",

journal = "Physical Review B: Condensed Matter and Materials Physics",

issn = "1098-0121",

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TY - JOUR

T1 - Proximity and Josephson effects in superconductor/antiferromagnetic Nb/gamma-Fe50Mn50 heterostructures

AU - Bell, C

AU - Tarte, EJ

AU - Burnell, G

AU - Leung, CW

AU - Kang, DJ

AU - Blamire, MG

AU - Bell, Chris

PY - 2003/10/1

Y1 - 2003/10/1

N2 - We study the proximity effect in superconductor (S), antiferromagnetic (AF) bilayers, and report the fabrication and measurement of the first trilayer S/AF/S Josephson junctions. The disordered fcc alloy gamma-Fe50Mn50 was used as the AF, and the S is Nb. Micron and submicron scale junctions were measured, and the scaling of J(C)(d(AF)) gives a coherence length in the AF of 2.4 nm, which correlates with the coherence length due to suppression of T-C in the bilayer samples. The diffusion constant for FeMn was found to be 1.7x10(-4) m(2) s(-1), and the density of states at the Fermi level was also obtained. An exchange biased FeMn/Co bilayer confirms the AF nature of the FeMn in this thickness regime.

AB - We study the proximity effect in superconductor (S), antiferromagnetic (AF) bilayers, and report the fabrication and measurement of the first trilayer S/AF/S Josephson junctions. The disordered fcc alloy gamma-Fe50Mn50 was used as the AF, and the S is Nb. Micron and submicron scale junctions were measured, and the scaling of J(C)(d(AF)) gives a coherence length in the AF of 2.4 nm, which correlates with the coherence length due to suppression of T-C in the bilayer samples. The diffusion constant for FeMn was found to be 1.7x10(-4) m(2) s(-1), and the density of states at the Fermi level was also obtained. An exchange biased FeMn/Co bilayer confirms the AF nature of the FeMn in this thickness regime.

KW - SNS JUNCTIONS

KW - FILMS

KW - SUPERCONDUCTIVITY

KW - FERROMAGNET

KW - MULTILAYERS

KW - DEPENDENCE

KW - THICKNESS

KW - FIELD

U2 - 10.1103/PhysRevB.68.144517

DO - 10.1103/PhysRevB.68.144517

M3 - Article (Academic Journal)

SN - 1098-0121

VL - 68

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

IS - 14

M1 - 144517

ER -

Proximity and Josephson effects in superconductor/antiferromagnetic Nb/gamma-Fe50Mn50 heterostructures

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Keywords

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