Spin-transfer torque efficiency measured using a Permalloy nanobridge

M C Hickey; D.-T Ngo; S Lepadatu; D Atkinson; D McGrouther; S McVitie; C H Marrows

doi:10.1063/1.3520144

Spin-transfer torque efficiency measured using a Permalloy nanobridge

M C Hickey, D.-T Ngo, S Lepadatu, D Atkinson, D McGrouther, S McVitie, C H Marrows

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We report magnetoresistance, focused Kerr effect, and Lorentz microscopy experiments performed on a nanoscale Permalloy bridge connecting microscale pads. These pads can be switched from a parallel to antiparallel state through the application of small fields, causing a detectable magnetoresistance. We show that this switching field Hsw is modified by the application of a high current density (Jdc) through spin-transfer torque effects, caused by the spin-current interacting with the magnetization gradients generated by the device geometry, yielding an estimate for the spin-transfer torque efficiency ξ=dHsw/dJdc=0.027 ± 0.001 Oe/MA cm-2.

Original language	English
Journal	Applied Physics Letters
Volume	97
Issue number	20
Pages (from-to)	202505
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.3520144
Publication status	Published - 2010
Externally published	Yes

Access to Document

10.1063/1.3520144

OpenUrl availability

Full text

Cite this

@article{cc9e477cb7b142cb88fb3183752ce777,

title = "Spin-transfer torque efficiency measured using a Permalloy nanobridge",

abstract = "We report magnetoresistance, focused Kerr effect, and Lorentz microscopy experiments performed on a nanoscale Permalloy bridge connecting microscale pads. These pads can be switched from a parallel to antiparallel state through the application of small fields, causing a detectable magnetoresistance. We show that this switching field Hsw is modified by the application of a high current density (Jdc) through spin-transfer torque effects, caused by the spin-current interacting with the magnetization gradients generated by the device geometry, yielding an estimate for the spin-transfer torque efficiency ξ=dHsw/dJdc=0.027 ± 0.001 Oe/MA cm-2.",

author = "Hickey, {M C} and D.-T Ngo and S Lepadatu and D Atkinson and D McGrouther and S McVitie and Marrows, {C H}",

year = "2010",

doi = "10.1063/1.3520144",

language = "English",

volume = "97",

pages = "202505",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "20",

}

TY - JOUR

T1 - Spin-transfer torque efficiency measured using a Permalloy nanobridge

AU - Hickey, M C

AU - Ngo, D.-T

AU - Lepadatu, S

AU - Atkinson, D

AU - McGrouther, D

AU - McVitie, S

AU - Marrows, C H

PY - 2010

Y1 - 2010

N2 - We report magnetoresistance, focused Kerr effect, and Lorentz microscopy experiments performed on a nanoscale Permalloy bridge connecting microscale pads. These pads can be switched from a parallel to antiparallel state through the application of small fields, causing a detectable magnetoresistance. We show that this switching field Hsw is modified by the application of a high current density (Jdc) through spin-transfer torque effects, caused by the spin-current interacting with the magnetization gradients generated by the device geometry, yielding an estimate for the spin-transfer torque efficiency ξ=dHsw/dJdc=0.027 ± 0.001 Oe/MA cm-2.

AB - We report magnetoresistance, focused Kerr effect, and Lorentz microscopy experiments performed on a nanoscale Permalloy bridge connecting microscale pads. These pads can be switched from a parallel to antiparallel state through the application of small fields, causing a detectable magnetoresistance. We show that this switching field Hsw is modified by the application of a high current density (Jdc) through spin-transfer torque effects, caused by the spin-current interacting with the magnetization gradients generated by the device geometry, yielding an estimate for the spin-transfer torque efficiency ξ=dHsw/dJdc=0.027 ± 0.001 Oe/MA cm-2.

U2 - 10.1063/1.3520144

DO - 10.1063/1.3520144

M3 - Journal article

SN - 0003-6951

VL - 97

SP - 202505

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

ER -

Spin-transfer torque efficiency measured using a Permalloy nanobridge

Abstract

Access to Document

OpenUrl availability

Fingerprint

Cite this