Spin-wave fluctuations in ferrimagnetic Mgx Fe3-x O4 nanoparticles

Franco A.; Zapf V.S.; Barbeta V.B.; Jardim R.F.

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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