Research Data Leeds Repository

Citation

Lepadatu, Serban and Saarikoski, Henri and Beacham, Robert and Benitez, Maria J. and Moore, Thomas A. and Burnell, Gavin and Sugimoto, Satoshi and Yesudas, Daniel and Wheeler, May C. and Miguel, Jorge and Dhesi, Sarnjeet S. and McGrouther, Damien and McVitie, Stephen and Tatara, Gen and Marrows, Christopher H. (2017) Data associated with 'Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion'. University of Leeds. [Dataset] https://doi.org/10.5518/175

Dataset description

Domain walls in ferromagnetic nanowires are potential building-blocks of future technologies such as racetrack memories, in which data encoded in the domain walls are transported using spinpolarised currents. However, the development of energy-efficient devices has been hampered by the high current densities needed to initiate domain wall motion. We show here that a remarkable reduction in the critical current density can be achieved for in-plane magnetised coupled domain walls in CoFe/Ru/CoFe synthetic ferrimagnet tracks. The antiferromagnetic exchange coupling between the layers leads to simple N´eel wall structures with a width of only ∼ 100 nm. The measured critical current density to set these walls in motion is 1.0 × 1011 Am−2 , almost an order of magnitude lower than in a ferromagnetically coupled control sample. Theoretical modelling indicates that this is due to nonadiabatic driving of anisotropically coupled walls, a mechanism that can be used to design efficient domain-wall devices.

Keywords:	Domain Walls; Spintronics; Magnetic materials; electron microscopy
Subjects:	F000 - Physical sciences > F300 - Physics F000 - Physical sciences > F300 - Physics > F310 - Applied physics F000 - Physical sciences > F300 - Physics > F320 - Chemical physics > F321 - Solid-state physics
Divisions:	Faculty of Engineering and Physical Sciences > School of Physics and Astronomy
Related resources:	Location Type https://doi.org/10.1038/s41598-017-01748-7 Publication https://eprints.whiterose.ac.uk/116358/ Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	13 Mar 2018 21:07
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/328
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Lepadatu, Serban https://orcid.org/0000-0001-6221-9727 University of Leeds https://ror.org/024mrxd33 ror Saarikoski, Henri https://orcid.org/0000-0001-6155-0119 RIKEN https://ror.org/01sjwvz98 ror Beacham, Robert University of Glasgow https://ror.org/00vtgdb53 ror Benitez, Maria J. https://orcid.org/0000-0003-3812-1222 University of Glasgow https://ror.org/00vtgdb53 ror Moore, Thomas A. https://orcid.org/0000-0001-6443-2556 University of Leeds https://ror.org/024mrxd33 ror Burnell, Gavin https://orcid.org/0000-0002-9486-0639 University of Leeds https://ror.org/024mrxd33 ror Sugimoto, Satoshi https://orcid.org/0000-0003-0212-2805 University of Leeds https://ror.org/024mrxd33 ror Yesudas, Daniel University of Leeds https://ror.org/024mrxd33 ror Wheeler, May C. University of Leeds https://ror.org/024mrxd33 ror Miguel, Jorge Diamond Light Source https://ror.org/05etxs293 ror Dhesi, Sarnjeet S. https://orcid.org/0000-0003-4966-0002 Diamond Light Source https://ror.org/05etxs293 ror McGrouther, Damien https://orcid.org/0000-0003-4893-0808 University of Glasgow https://ror.org/00vtgdb53 ror McVitie, Stephen https://orcid.org/0000-0003-4511-6413 University of Glasgow https://ror.org/00vtgdb53 ror Tatara, Gen https://orcid.org/0000-0003-0642-8609 RIKEN https://ror.org/01sjwvz98 ror Marrows, Christopher H. https://orcid.org/0000-0003-4812-6393 University of Leeds https://ror.org/024mrxd33 ror Type of data: Dataset Research funders: EPSRC, EU, Diamond Light Source, Japan Society for the Promotion of Science Grant numbers: EP/I011668/1, Marie Curie International Incoming Fellowship SKYHIGH, 26390014 Publication date: 2017 Resource language: English Metadata language: English Publisher: University of Leeds Contact email: C.H.Marrows@leeds.ac.uk Last Modified: 08 Aug 2024 11:42

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Readme.rst [1kB] Readme.rst [1kB] Readme.rst [1kB] Security: Anyone File name: Readme.rst Content type: Documentation Mime-Type: text/plain License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 1kB

Data

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Deposition [159kB] Deposition [159kB] Deposition [159kB] Security: Anyone File name: Deposition.tar.gz Content type: Data Description: Records of the deposition run logs giving materials, powers, rates, and stack layers. Mime-Type: application/x-gzip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 159kB

XRD [266kB] XRD [266kB] XRD [266kB] Security: Anyone File name: XRD.tar.gz Content type: Data Description: X-ray reflectometry characterisation traces for determining layer thicknesses and structures Mime-Type: application/x-gzip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 266kB

EBL [6kB] EBL [6kB] EBL [6kB] Security: Anyone File name: EBL.tar.gz Content type: Data Description: File contains specifications for standard electron beam lithography recipes used. Mime-Type: application/x-gzip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 6kB

EBL Patterns [61kB] EBL Patterns [61kB] EBL Patterns [61kB] Security: Anyone File name: EBLPatterns.tar.gz Content type: Data Description: File contains specifications for standard electron beam lithography recipes used. Mime-Type: application/x-gzip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 61kB

Resistance-temperature data for a sample annealing [284B] Resistance-temperature data for a sample annealing [284B] Resistance-temperature data for a sample annealing [284B] Security: Anyone File name: Annealing.tar.gz Content type: Data Description: Resistance-temperature data for a sample annealing Mime-Type: application/x-gzip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 284B

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Transmission Electron Microscopy Images [2GB] Transmission Electron Microscopy Images [2GB] Transmission Electron Microscopy Images [2GB] Security: Anyone File name: Imaging-TEM.tar.gz Content type: Data Mime-Type: application/x-gzip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 2GB

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Ferromagnetic Resonance Measurements [81MB] Ferromagnetic Resonance Measurements [81MB] Ferromagnetic Resonance Measurements [81MB] Security: Anyone File name: Measurements-FMR.tar.gz Content type: Data Mime-Type: application/x-gzip License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 81MB

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X-ray circular dichroism photo-electron emission microscopy images and processed data (2) [5GB] X-ray circular dichroism photo-electron emission microscopy images and processed data (2) [5GB] X-ray circular dichroism photo-electron emission microscopy images and processed data (2) [5GB] Security: Anyone File name: Measurements-PEEM.tar.gz.002 Content type: Data License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 5GB

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