A new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles
In this work, a new approach is described for the calculation of the relaxation time and magnetic anisotropy energy of magnetic nanoparticles. Ferrofluids containing monodispersed magnetite nanoparticles were synthesized via hydrothermal method and then heated using the 10 kA/m external AC magne...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2012-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2012/1450-53391200004A.pdf |
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| author | Ahmadi R. Hosseini Madaah H.R. |
| author_facet | Ahmadi R. Hosseini Madaah H.R. |
| author_sort | Ahmadi R. |
| collection | DOAJ |
| description | In this work, a new approach is described for the calculation of the relaxation time and magnetic anisotropy energy of magnetic nanoparticles. Ferrofluids containing monodispersed magnetite nanoparticles were synthesized via hydrothermal method and then heated using the 10 kA/m external AC magnetic fields in three different frequencies: 10, 50 and 100 kHz. By measuring the temperature variations during the application of the magnetic field, the total magnetic time constant including both Brownian and Neel relaxation times can be calculated. By measuring the magnetic core size and hydrodynamic size of particles, the magnetic anisotropy can be calculated too. Synthesized ferrofluids were characterized via TEM, XRD, VSM and PCS techniques and the results were used for the mentioned calculations. |
| format | Article |
| id | doaj-art-5b974b087f22416c9fb50896ea512a59 |
| institution | Kabale University |
| issn | 1450-5339 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-5b974b087f22416c9fb50896ea512a592025-02-02T10:36:03ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392012-01-01481818810.2298/JMMB110330004AA new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticlesAhmadi R.Hosseini Madaah H.R.In this work, a new approach is described for the calculation of the relaxation time and magnetic anisotropy energy of magnetic nanoparticles. Ferrofluids containing monodispersed magnetite nanoparticles were synthesized via hydrothermal method and then heated using the 10 kA/m external AC magnetic fields in three different frequencies: 10, 50 and 100 kHz. By measuring the temperature variations during the application of the magnetic field, the total magnetic time constant including both Brownian and Neel relaxation times can be calculated. By measuring the magnetic core size and hydrodynamic size of particles, the magnetic anisotropy can be calculated too. Synthesized ferrofluids were characterized via TEM, XRD, VSM and PCS techniques and the results were used for the mentioned calculations.http://www.doiserbia.nb.rs/img/doi/1450-5339/2012/1450-53391200004A.pdfrelaxation timemagnetic anisotropyFerrofluidsmagnetite nanoparticles |
| spellingShingle | Ahmadi R. Hosseini Madaah H.R. A new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles Journal of Mining and Metallurgy. Section B: Metallurgy relaxation time magnetic anisotropy Ferrofluids magnetite nanoparticles |
| title | A new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles |
| title_full | A new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles |
| title_fullStr | A new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles |
| title_full_unstemmed | A new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles |
| title_short | A new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles |
| title_sort | new approach for calculation of relaxation time and magnetic anisotropy of ferrofluids containing superparmagnetic nanoparticles |
| topic | relaxation time magnetic anisotropy Ferrofluids magnetite nanoparticles |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2012/1450-53391200004A.pdf |
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