Magnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigation
In this work a full angle dependent Ferromagnetic Resonance (FMR) investigation on a system of 20 separated Fe/FexOy nanocubes without dipolar coupling is reported. The angular magnetic field dependence of FMR spectra of 20 single particles and 2 dimers were recorded using a microresonator setup wit...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2016-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4944399 |
| _version_ | 1828494339950510080 |
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| author | Alexandra Terwey Ralf Meckenstock Benjamin W. Zingsem Sabrina Masur Christian Derricks Florian M. Römer Michael Farle |
| author_facet | Alexandra Terwey Ralf Meckenstock Benjamin W. Zingsem Sabrina Masur Christian Derricks Florian M. Römer Michael Farle |
| author_sort | Alexandra Terwey |
| collection | DOAJ |
| description | In this work a full angle dependent Ferromagnetic Resonance (FMR) investigation on a system of 20 separated Fe/FexOy nanocubes without dipolar coupling is reported. The angular magnetic field dependence of FMR spectra of 20 single particles and 2 dimers were recorded using a microresonator setup with a sensitivity of 106 μB at X-band frequencies. We determine an effective magnetocrystalline anisotropy field of 2K4,eff/M = 50 mT ± 5 mT for selected particles, which is smaller than the one of bulk Fe due to the core shell morphology of the particles. The FMR resonances have a linewidth of 4 mT ± 1 mT, corresponding to a magnetic effective damping parameter α = 0.0045 ± 0.0005 matching the values of high quality iron thin films. Numerical calculations taking into account the different angular orientations of the 24 particles with respect to the external magnetic field yield a good agreement to the experiment. |
| first_indexed | 2024-12-11T11:54:26Z |
| format | Article |
| id | doaj.art-ca1a764462c944bb846df42239056e8b |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-11T11:54:26Z |
| publishDate | 2016-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-ca1a764462c944bb846df42239056e8b2022-12-22T01:08:15ZengAIP Publishing LLCAIP Advances2158-32262016-05-0165056119056119-610.1063/1.4944399133691ADVMagnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigationAlexandra Terwey0Ralf Meckenstock1Benjamin W. Zingsem2Sabrina Masur3Christian Derricks4Florian M. Römer5Michael Farle6Faculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Duisburg, 47057, GermanyFaculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Duisburg, 47057, GermanyFaculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Duisburg, 47057, GermanyFaculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Duisburg, 47057, GermanyFaculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Duisburg, 47057, GermanyFaculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Duisburg, 47057, GermanyFaculty of Physics and Center for Nanointegration (CENIDE), University Duisburg-Essen, Duisburg, 47057, GermanyIn this work a full angle dependent Ferromagnetic Resonance (FMR) investigation on a system of 20 separated Fe/FexOy nanocubes without dipolar coupling is reported. The angular magnetic field dependence of FMR spectra of 20 single particles and 2 dimers were recorded using a microresonator setup with a sensitivity of 106 μB at X-band frequencies. We determine an effective magnetocrystalline anisotropy field of 2K4,eff/M = 50 mT ± 5 mT for selected particles, which is smaller than the one of bulk Fe due to the core shell morphology of the particles. The FMR resonances have a linewidth of 4 mT ± 1 mT, corresponding to a magnetic effective damping parameter α = 0.0045 ± 0.0005 matching the values of high quality iron thin films. Numerical calculations taking into account the different angular orientations of the 24 particles with respect to the external magnetic field yield a good agreement to the experiment.http://dx.doi.org/10.1063/1.4944399 |
| spellingShingle | Alexandra Terwey Ralf Meckenstock Benjamin W. Zingsem Sabrina Masur Christian Derricks Florian M. Römer Michael Farle Magnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigation AIP Advances |
| title | Magnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigation |
| title_full | Magnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigation |
| title_fullStr | Magnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigation |
| title_full_unstemmed | Magnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigation |
| title_short | Magnetic anisotropy and relaxation of single Fe/FexOy core/shell- nanocubes: A ferromagnetic resonance investigation |
| title_sort | magnetic anisotropy and relaxation of single fe fexoy core shell nanocubes a ferromagnetic resonance investigation |
| url | http://dx.doi.org/10.1063/1.4944399 |
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