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Ferrimagnetism and spin excitation in a Ni-Mn partially inverted spinel prepared using a modified polymeric precursor method

Ferreira, Rafael A.; Tedesco, Julio C. G.; Birk, Jonas O.; Kalceff, Walter; Yokaichiya, Fabiano; Rasmussen, Nina; Pena, Octavio; Henry, Paul LU ; Simeoni, Giovanna G. and Bordallo, Heloisa N., et al. (2014) In Materials Chemistry and Physics 146(1-2). p.58-64
Abstract
We demonstrate that a Ni-Mn oxide partially inverted spinel (Ni1-pMnv)[NivMn2-v]O-4 having inversion degree v approximate to 0.8 and produced by a modified polymeric precursor method exhibits behaviour previously reported only in monophased samples. The structure of the specimen was determined using Rietveld analysis of X-ray and neutron powder diffraction data, showing that at room temperature the material crystallizes in the Fd3(over bar)m space group with a lattice constant a = 8.392 angstrom. Combining magnetization measurements with neutron powder diffraction, we show that the magnetic structure of this spinel is associated with the interplay between the ferromagnetic and antiferromagnetic lattices which coexist due to the cations'... (More)
We demonstrate that a Ni-Mn oxide partially inverted spinel (Ni1-pMnv)[NivMn2-v]O-4 having inversion degree v approximate to 0.8 and produced by a modified polymeric precursor method exhibits behaviour previously reported only in monophased samples. The structure of the specimen was determined using Rietveld analysis of X-ray and neutron powder diffraction data, showing that at room temperature the material crystallizes in the Fd3(over bar)m space group with a lattice constant a = 8.392 angstrom. Combining magnetization measurements with neutron powder diffraction, we show that the magnetic structure of this spinel is associated with the interplay between the ferromagnetic and antiferromagnetic lattices which coexist due to the cations' presence on both tetrahedral and octahedral sites. Our analysis of the neutron diffraction data confirms the postulated magnetic structure involving a star-like moment arrangement, arising from competition for the B (octahedral) spinel sites by the Ni and Mn cations. Finally, we show that strong magnetic fluctuations are observed in the inelastic neutron scattering data. (C) 2014 Elsevier B.V. All rights reserved. (Less)
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publication status
published
subject
keywords
Magnetic materials, Chemical synthesis, X-ray scattering, Neutron, scattering and diffraction, Rietveld analysis, Magnetic structures
in
Materials Chemistry and Physics
volume
146
issue
1-2
pages
58 - 64
publisher
Elsevier
external identifiers
  • wos:000336467900008
  • scopus:84899451726
ISSN
0254-0584
DOI
10.1016/j.matchemphys.2014.02.042
language
English
LU publication?
yes
id
e8319b2e-b7a3-436f-88f5-d4f30f5bd6bb (old id 4558811)
date added to LUP
2014-07-17 13:13:51
date last changed
2017-02-26 03:06:33
@article{e8319b2e-b7a3-436f-88f5-d4f30f5bd6bb,
  abstract     = {We demonstrate that a Ni-Mn oxide partially inverted spinel (Ni1-pMnv)[NivMn2-v]O-4 having inversion degree v approximate to 0.8 and produced by a modified polymeric precursor method exhibits behaviour previously reported only in monophased samples. The structure of the specimen was determined using Rietveld analysis of X-ray and neutron powder diffraction data, showing that at room temperature the material crystallizes in the Fd3(over bar)m space group with a lattice constant a = 8.392 angstrom. Combining magnetization measurements with neutron powder diffraction, we show that the magnetic structure of this spinel is associated with the interplay between the ferromagnetic and antiferromagnetic lattices which coexist due to the cations' presence on both tetrahedral and octahedral sites. Our analysis of the neutron diffraction data confirms the postulated magnetic structure involving a star-like moment arrangement, arising from competition for the B (octahedral) spinel sites by the Ni and Mn cations. Finally, we show that strong magnetic fluctuations are observed in the inelastic neutron scattering data. (C) 2014 Elsevier B.V. All rights reserved.},
  author       = {Ferreira, Rafael A. and Tedesco, Julio C. G. and Birk, Jonas O. and Kalceff, Walter and Yokaichiya, Fabiano and Rasmussen, Nina and Pena, Octavio and Henry, Paul and Simeoni, Giovanna G. and Bordallo, Heloisa N. and Lisboa-Filho, Paulo N.},
  issn         = {0254-0584},
  keyword      = {Magnetic materials,Chemical synthesis,X-ray scattering,Neutron,scattering and diffraction,Rietveld analysis,Magnetic structures},
  language     = {eng},
  number       = {1-2},
  pages        = {58--64},
  publisher    = {Elsevier},
  series       = {Materials Chemistry and Physics},
  title        = {Ferrimagnetism and spin excitation in a Ni-Mn partially inverted spinel prepared using a modified polymeric precursor method},
  url          = {http://dx.doi.org/10.1016/j.matchemphys.2014.02.042},
  volume       = {146},
  year         = {2014},
}