Controllable Josephson current through a pseudospin-valve structure

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

doi:10.1063/1.1646217

Controllable Josephson current through a pseudospin-valve structure

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

^*Corresponding author for this work

School of Physics

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

97 Citations (Scopus)

Abstract

A thin Co/Cu/permalloy (Ni80Fe20) pseudospin-valve structure is sandwiched between superconducting Nb contacts. When the current is passed perpendicular to the plane of the film a Josephson critical current (I-C) is observed at 4.2 K, in addition to a magnetoresistance (MR) of similar to0.5% at high bias. The hysteresis loop of the spin-valve structure can be cycled to modulate the zero field I-C of the junction in line with the MR measurements. These modulations of resistance and I-C occur both smoothly and sharply with the field applied. For each type of behavior there is a strong correlation between the shape of the MR loops and the I-C modulation. (C) 2004 American Institute of Physics.

Original language	English
Pages (from-to)	1153-1155
Number of pages	3
Journal	Applied Physics Letters
Volume	84
Issue number	7
DOIs	https://doi.org/10.1063/1.1646217
Publication status	Published - 16 Feb 2004

Keywords

PERPENDICULAR GIANT MAGNETORESISTANCES
PI-JUNCTION
FERROMAGNET
FABRICATION
MULTILAYERS
CONTACTS

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@article{d8bd128bbeec4781a4e622bb8b68f9d0,

title = "Controllable Josephson current through a pseudospin-valve structure",

abstract = "A thin Co/Cu/permalloy (Ni80Fe20) pseudospin-valve structure is sandwiched between superconducting Nb contacts. When the current is passed perpendicular to the plane of the film a Josephson critical current (I-C) is observed at 4.2 K, in addition to a magnetoresistance (MR) of similar to0.5% at high bias. The hysteresis loop of the spin-valve structure can be cycled to modulate the zero field I-C of the junction in line with the MR measurements. These modulations of resistance and I-C occur both smoothly and sharply with the field applied. For each type of behavior there is a strong correlation between the shape of the MR loops and the I-C modulation. (C) 2004 American Institute of Physics.",

keywords = "PERPENDICULAR GIANT MAGNETORESISTANCES, PI-JUNCTION, FERROMAGNET, FABRICATION, MULTILAYERS, CONTACTS",

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

year = "2004",

month = feb,

day = "16",

doi = "10.1063/1.1646217",

language = "English",

volume = "84",

pages = "1153--1155",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics (AIP)",

number = "7",

}

TY - JOUR

T1 - Controllable Josephson current through a pseudospin-valve structure

AU - Bell, C

AU - Burnell, G

AU - Leung, CW

AU - Tarte, EJ

AU - Kang, DJ

AU - Blamire, MG

AU - Bell, Chris

PY - 2004/2/16

Y1 - 2004/2/16

N2 - A thin Co/Cu/permalloy (Ni80Fe20) pseudospin-valve structure is sandwiched between superconducting Nb contacts. When the current is passed perpendicular to the plane of the film a Josephson critical current (I-C) is observed at 4.2 K, in addition to a magnetoresistance (MR) of similar to0.5% at high bias. The hysteresis loop of the spin-valve structure can be cycled to modulate the zero field I-C of the junction in line with the MR measurements. These modulations of resistance and I-C occur both smoothly and sharply with the field applied. For each type of behavior there is a strong correlation between the shape of the MR loops and the I-C modulation. (C) 2004 American Institute of Physics.

AB - A thin Co/Cu/permalloy (Ni80Fe20) pseudospin-valve structure is sandwiched between superconducting Nb contacts. When the current is passed perpendicular to the plane of the film a Josephson critical current (I-C) is observed at 4.2 K, in addition to a magnetoresistance (MR) of similar to0.5% at high bias. The hysteresis loop of the spin-valve structure can be cycled to modulate the zero field I-C of the junction in line with the MR measurements. These modulations of resistance and I-C occur both smoothly and sharply with the field applied. For each type of behavior there is a strong correlation between the shape of the MR loops and the I-C modulation. (C) 2004 American Institute of Physics.

KW - PERPENDICULAR GIANT MAGNETORESISTANCES

KW - PI-JUNCTION

KW - FERROMAGNET

KW - FABRICATION

KW - MULTILAYERS

KW - CONTACTS

U2 - 10.1063/1.1646217

DO - 10.1063/1.1646217

M3 - Article (Academic Journal)

SN - 0003-6951

VL - 84

SP - 1153

EP - 1155

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 7

ER -

Controllable Josephson current through a pseudospin-valve structure

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