Spin-wave fluctuations in ferrimagnetic Mgx Fe3-x O4 nanoparticles
| dc.contributor.author | Franco A. | |
| dc.contributor.author | Zapf V.S. | |
| dc.contributor.author | Barbeta V.B. | |
| dc.contributor.author | Jardim R.F. | |
| dc.date.accessioned | 2019-08-19T23:47:28Z | |
| dc.date.accessioned | 2023-05-03T20:38:05Z | |
| dc.date.available | 2019-08-19T23:47:28Z | |
| dc.date.available | 2023-05-03T20:38:05Z | |
| dc.date.issued | 2010 | |
| dc.identifier.citation | FRANCO, A.; ZAPF, V. S.; Barbeta, V. B.; JARDIM, R. F.. Spin-wave fluctuations in ferrimagnetic Mg[sub x]Fe[sub 3−x]O[sub 4] nanoparticles. Journal of Applied Physics, v. 107, n. 7, p. 073904, 2010. | |
| dc.identifier.issn | 0021-8979 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12032/89512 | |
| dc.description.abstract | We have performed a systematic study of the magnetic properties of a series of ferrimagnetic nanoparticles of Mgx Fe3-x O4 (0.8times;1.5) prepared by the combustion reaction method. The magnetization data can be well fitted by Bloch's law with T3/2. Bloch's constant B determined from the fitting procedure was found to increase with Mg content x from ∼3.09× 10-5 K-3/2 for x=0.8 to 6.27× 10-5 K-3/2 for x=1.5. The exchange integral JAB and the spin-wave stiffness constant D of Mgx Fe3-x O4 nanoparticles were also determined as ∼0.842 and 0.574 meV and 296 and 202 meV Å2 for specimens with x=0.8 and 1.5, respectively. These results are discussed in terms of cation redistribution among A and B sites on these nanostructured spinel ferrites. © 2010 American Institute of Physics. | |
| dc.relation.ispartof | Journal of Applied Physics | |
| dc.rights | Acesso Restrito | |
| dc.title | Spin-wave fluctuations in ferrimagnetic Mgx Fe3-x O4 nanoparticles | |
| dc.type | Artigo |
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