Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance
Electron spin resonance (ESR) measurements at room temperature and X-band microwave frequency were performed on highly crystalline FePt system thin films. Fairly high DC static magnetic field absorption of about 300 mT was observed in these films. We attribute the high field absorption to ferromagne...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Spectroscopy |
| Online Access: | http://dx.doi.org/10.1155/2013/272704 |
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| author | S. S. Nkosi H. M. Gavi D. E. Motaung J. Keartland E. Sideras-Haddad A. Forbes B. W. Mwakikunga |
| author_facet | S. S. Nkosi H. M. Gavi D. E. Motaung J. Keartland E. Sideras-Haddad A. Forbes B. W. Mwakikunga |
| author_sort | S. S. Nkosi |
| collection | DOAJ |
| description | Electron spin resonance (ESR) measurements at room temperature and X-band microwave frequency were performed on highly crystalline FePt system thin films. Fairly high DC static magnetic field absorption of about 300 mT was observed in these films. We attribute the high field absorption to ferromagnetic resonance (FMR). Upon increasing iron content in FePt system, no detectable spin waves modes were identified already at room temperature. This signifies a homogeneous distribution of the magnetization across the films. We qualitatively attributed such homogeneity distribution in the films to self-assembly of these Fe–Pt system nanoparticles. The results revealed that the FePt system contains hyperfine coupling with sextet I=5/2 exhibiting a phase reversal behaviour compared to FMR line. Both iron content and crystallite size increased the FMR intensity making the films good candidates for large data storage mediums and spintronics. |
| format | Article |
| id | doaj-art-e62fd7f8a5e1478ab1047b761f63c234 |
| institution | Kabale University |
| issn | 2314-4920 2314-4939 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Spectroscopy |
| spelling | doaj-art-e62fd7f8a5e1478ab1047b761f63c2342025-02-03T01:13:13ZengWileyJournal of Spectroscopy2314-49202314-49392013-01-01201310.1155/2013/272704272704Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin ResonanceS. S. Nkosi0H. M. Gavi1D. E. Motaung2J. Keartland3E. Sideras-Haddad4A. Forbes5B. W. Mwakikunga6DST/CSIR-National Centre for Nano-Structured Materials (NCNSM), Meiring Naudé Road, Brummeria, Pretoria 0001, South AfricaDepartment of Physics, University of Pretoria, Lynwood Street, Pretoria 0001, South AfricaDST/CSIR-National Centre for Nano-Structured Materials (NCNSM), Meiring Naudé Road, Brummeria, Pretoria 0001, South AfricaDepartment of Physics, University of the Witwatersrand, Johannesburg 2050, South AfricaDepartment of Physics, University of the Witwatersrand, Johannesburg 2050, South AfricaNational Laser Centre-Council of Scientific and Industrial Research (CSIR), Meiring Naudé Road, Brummeria, Pretoria 0001, South AfricaDST/CSIR-National Centre for Nano-Structured Materials (NCNSM), Meiring Naudé Road, Brummeria, Pretoria 0001, South AfricaElectron spin resonance (ESR) measurements at room temperature and X-band microwave frequency were performed on highly crystalline FePt system thin films. Fairly high DC static magnetic field absorption of about 300 mT was observed in these films. We attribute the high field absorption to ferromagnetic resonance (FMR). Upon increasing iron content in FePt system, no detectable spin waves modes were identified already at room temperature. This signifies a homogeneous distribution of the magnetization across the films. We qualitatively attributed such homogeneity distribution in the films to self-assembly of these Fe–Pt system nanoparticles. The results revealed that the FePt system contains hyperfine coupling with sextet I=5/2 exhibiting a phase reversal behaviour compared to FMR line. Both iron content and crystallite size increased the FMR intensity making the films good candidates for large data storage mediums and spintronics.http://dx.doi.org/10.1155/2013/272704 |
| spellingShingle | S. S. Nkosi H. M. Gavi D. E. Motaung J. Keartland E. Sideras-Haddad A. Forbes B. W. Mwakikunga Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance Journal of Spectroscopy |
| title | Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance |
| title_full | Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance |
| title_fullStr | Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance |
| title_full_unstemmed | Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance |
| title_short | Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance |
| title_sort | ferromagnetic resonance characterization of nano fept by electron spin resonance |
| url | http://dx.doi.org/10.1155/2013/272704 |
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