Spin-transfer torque efficiency measured using a Permalloy nanobridge

Duncan Mcgrouther; 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

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

Research output: Contribution to journal › Article › 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 =d Hsw /d Jdc =0.027±0.001 Oe/MA cm -2. © 2010 American Institute of Physics.

Original language	English
Article number	202505
Journal	Applied Physics Letters
Volume	97
Issue number	20
DOIs	https://doi.org/10.1063/1.3520144
Publication status	Published - 15 Nov 2010

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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 =d Hsw /d Jdc =0.027±0.001 Oe/MA cm -2. {\textcopyright} 2010 American Institute of Physics.",

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

year = "2010",

month = nov,

day = "15",

doi = "10.1063/1.3520144",

language = "English",

volume = "97",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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

AU - Mcgrouther, Duncan

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 - 2010/11/15

Y1 - 2010/11/15

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 =d Hsw /d Jdc =0.027±0.001 Oe/MA cm -2. © 2010 American Institute of Physics.

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 =d Hsw /d Jdc =0.027±0.001 Oe/MA cm -2. © 2010 American Institute of Physics.

U2 - 10.1063/1.3520144

DO - 10.1063/1.3520144

M3 - Article

SN - 0003-6951

VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

M1 - 202505

ER -

Spin-transfer torque efficiency measured using a Permalloy nanobridge

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