Canted standing spin-wave modes of permalloy thin films observed by ferromagnetic resonance
dc.contributor.author | Dąbrowski, M | |
dc.contributor.author | Hicken, RJ | |
dc.contributor.author | Frisk, A | |
dc.contributor.author | Newman, DG | |
dc.contributor.author | Klewe, C | |
dc.contributor.author | N'Diaye, AT | |
dc.contributor.author | Shafer, P | |
dc.contributor.author | Van Der Laan, G | |
dc.contributor.author | Hesjedal, T | |
dc.contributor.author | Bowden, GJ | |
dc.date.accessioned | 2021-09-30T10:56:57Z | |
dc.date.issued | 2021-02-12 | |
dc.description.abstract | Non-collinear spin structures in materials that combine perpendicular and in-plane magnetic anisotropies are of great technological interest for microwave and spin wave-assisted magnetization switching. [Co/Pt] multilayers are well-known perpendicular anisotropy materials that have the potential to pin the magnetization of a soft magnetic layer, such as permalloy (Py), that has in-plane anisotropy, thereby forming a magnetic exchange spring. Here we report on multilayered [Co/Pt]/Pt/Py films, where an additional ultrathin Pt spacer has been included to control the coupling between the sub-units with in-plane and perpendicular magnetic anisotropy. Vector network analyser (VNA)-ferromagnetic resonance (FMR) measurements were made to obtain a complete picture of the resonant conditions, while the dynamical response of the sub-units was probed by synchrotron-based element- and phase selective x-ray detected FMR (XFMR). For all samples, only slight pinning of the dynamic magnetization of the Py by the [Co/Pt] was noted, and the FMR results were dominated by the 50 nm thick Py layer. Out-of-plane VNA-FMR maps reveal the presence of additional modes, e.g. a perpendicular standing spin-wave (PSSW) state. However, as the magnetic field is reduced below the saturation field, the PSSW state morphs continuously through a series of canted standing spin-wave (CSSW) states into a horizontal standing spin-wave (HSSW) state. The PSSW, CSSW and HSSW states are well described using a multilayer model of the Py film. The observation of CSSW modes is of particular relevance to microwave assisted magnetic recording, where microwave excitation stimulates precession of a soft layer canted out of plane by a pulsed magnetic field. | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.identifier.citation | Vol. 23, article 023017 | en_GB |
dc.identifier.doi | 10.1088/1367-2630/abdd6b | |
dc.identifier.grantnumber | EP/P021190/1 | en_GB |
dc.identifier.grantnumber | EP/P020151/1 | en_GB |
dc.identifier.grantnumber | EP/P02047X/1 | en_GB |
dc.identifier.grantnumber | EP/L015331/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/127289 | |
dc.language.iso | en | en_GB |
dc.publisher | IOP Publishing / Deutsche Physikalische Gesellschaft | en_GB |
dc.rights | © 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. open access. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. | en_GB |
dc.subject | ferromagnetic resonance | en_GB |
dc.subject | standing spin waves | en_GB |
dc.subject | XFMR | en_GB |
dc.subject | canted magnetization | en_GB |
dc.subject | exchange spring magnet | en_GB |
dc.title | Canted standing spin-wave modes of permalloy thin films observed by ferromagnetic resonance | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2021-09-30T10:56:57Z | |
dc.identifier.issn | 1367-2630 | |
dc.description | This is the final version. Available on open access from IOP Publishing via the DOI in this record | en_GB |
dc.description | Data availability statement: The data that support the findings of this study are available upon reasonable request from the authors. | en_GB |
dc.identifier.journal | New Journal of Physics | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2021-01-19 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2021-02-12 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2021-09-30T10:51:59Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2021-09-30T10:57:04Z | |
refterms.panel | B | en_GB |
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Except where otherwise noted, this item's licence is described as © 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. open access. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.