Výsledky vyhledávání - "J. Mestnik-Filho"

Magnetic and transport properties assisted by local distortions in Bi 2 Mn 4 O 10 and Bi 2 Fe 4 O 9 multiferroic compounds

Autor: J. Mestnik-Filho, Jose A. Souza, F.E.N. Ramirez, Artur W. Carbonari, Gabriel A. Cabrera-Pasca

Publikováno v: Journal of Alloys and Compounds. 651:405-413

We have performed a comprehensive study on the magnetic and electrical properties through macroscopic and local characterizations on Bi2Mn4O10 and Bi2Fe4O9. An analysis of the temperature evolution of local distortions, which was obtained by perturbe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4f967e506dad6d828edf6d9fbe16db31
https://doi.org/10.1016/j.jallcom.2015.08.165

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Charge distribution and hyperfine interactions in the vicinity of impurity sites in In 2 O 3 doped with Fe, Co, and Ni

Autor: Artur W. Carbonari, Jose A. H. Coaquira, L.F.D. Pereira, J. Mestnik-Filho, Gabriel A. Cabrera-Pasca, C. Sena, E.L. Muñoz, M. S. Costa

Publikováno v: Journal of Magnetism and Magnetic Materials. 387:165-178

In this paper, first-principles calculations based on density functional theory (DFT) were used to determine TM (TM=Fe, Ni, Co) and Cd impurity locations in the In2O3 host structure, their charge states, the electronic and structural relaxations indu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b092b32b24cc0f87b73846b292e4811
https://doi.org/10.1016/j.jmmm.2015.03.092

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Local Structure of Core–Shell MnFe 2 O 4+δ -Based Nanocrystals: Cation Distribution and Valence States of Manganese Ions

Autor: Renata Aquino, Fernando H. Martins, F.L.O. Paula, Florence Porcher, Pierre Bonville, Régine Perzynski, Juliano de Andrade Gomes, J. Mestnik-Filho, Jerome Depeyrot, Franciscarlos Gomes da Silva

Publikováno v: Journal of Physical Chemistry C
Journal of Physical Chemistry C, American Chemical Society, 2017, 121 (16), pp.8982-8991. ⟨10.1021/acs.jpcc.6b09274⟩
Journal of Physical Chemistry C, 2017, 121 (16), pp.8982-8991. ⟨10.1021/acs.jpcc.6b09274⟩

International audience; We investigate the local structure of nanoparticles based on a manganese ferrite core surrounded or not by a maghemite layer obtained after hydrothermal surface treatment. Results of X-ray powder diffraction (XRD) and neutron

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14bb322ec42df2df34d2fb2bf2145442
https://hal-cea.archives-ouvertes.fr/cea-01567847/file/acs.jpcc.6b09274.pdf

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Magnetic hyperfine interactions on Cd sites of the rare-earth cadmium compoundsRCd(R=Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er)

Autor: R. N. Saxena, B. Bosch-Santos, Artur W. Carbonari, O. F. L. S. Leite Neto, F. H. M. Cavalcante, H. Saitovitch, J. T. Cavalcante, L.F.D. Pereira, M. Forker, J. Mestnik-Filho

Publikováno v: Physical Review B. 94

This paper reports the investigation of the magnetic hyperfine field ${B}_{hf}$ in a series of rare-earth ($R$) cadmium intermetallic compounds $R\mathrm{Cd}$ and ${\mathrm{GdCd}}_{2}$ measured by perturbed angular correlation (PAC) spectroscopy usin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c609133901f8ba383d171a2ecc9636a
https://doi.org/10.1103/physrevb.94.064417

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Structural, Chemical, and Magnetic Investigations of Core–Shell Zinc Ferrite Nanoparticles

Autor: J. Mestnik-Filho, Régine Perzynski, F.A. Tourinho, F.L.O. Paula, G. M. Azevedo, Jerome Depeyrot, Juliano de Andrade Gomes

Publikováno v: The Journal of Physical Chemistry C. 116:24281-24291

We investigate here the internal structure of zinc ferrite nanoparticles designed and prepared by a soft chemistry method to elaborate magnetic nanocolloids. The strategy used to avoid acid dissolu...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d452b10bcddf2f4b4f469b62c7762e24
https://doi.org/10.1021/jp3055069

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ZnFe2O4 nanoparticles for ferrofluids: A combined XANES and XRD study

Autor: G.J. da Silva, Jerome Depeyrot, G. M. Azevedo, Régine Perzynski, F.A. Tourinho, Juliano de Andrade Gomes, J. Mestnik-Filho

Publikováno v: Journal of Magnetism and Magnetic Materials. 323:1203-1206

A soft-chemistry method is used to synthesize zinc ferrite nanoparticles to prepare a magnetic fluid. We investigate here their internal structure by X-ray Absorption Near Edge Spectroscopy (XANES) and X-Ray Diffraction (XRD). A cross analysis of XAN

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e38da1b07274ae32b6d8d3dd50afcf0b
https://doi.org/10.1016/j.jmmm.2010.11.006

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Cation distribution in copper ferrite nanoparticles of ferrofluids: A synchrotron XRD and EXAFS investigation

Autor: G.J. da Silva, Juliano de Andrade Gomes, J. Mestnik-Filho, Rosangela Itri, Marcelo Henrique Sousa, Jerome Depeyrot, G. de M. Azevedo, F.A. Tourinho

Publikováno v: Journal of Magnetism and Magnetic Materials. 300:e213-e216

This work reports on the structural characterization of a copper ferrite nanoparticle sample, prepared by coprecipitation method, on both short (EXAFS) and long range (XRD) scales. The diffractograms obtained at room temperature were used for Rietvel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba3aab6d7c4c909a5124e721dba33573
https://doi.org/10.1016/j.jmmm.2005.10.083

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Rietveld structure refinement of the cation distribution in ferrite fine particles studied by X-ray powder diffraction

Autor: Jerome Depeyrot, F.A. Tourinho, Rosangela Itri, J. Mestnik-Filho, Marcelo Henrique Sousa, Juliano de Andrade Gomes

Publikováno v: Journal of Magnetism and Magnetic Materials. 289:184-187

Samples of ZnFe 2 O 4 and CuFe 2 O 4 fine particles prepared by coprecipitation method have been studied by X-ray powder diffraction at room temperature. The oxygen position, the lattice parameter, the mean size of the nanoparticles and the cation di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a4d2e0f243aa2e1e01f5b2b6a868d66
https://doi.org/10.1016/j.jmmm.2004.11.053

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Time Differential Perturbed Angularγγ-Correlation Studies of Diethylenetriaminepentaacetic Acid Complexes with111In and111mCd

Autor: A.W. Carbonari, J. Mestnik-Filho, S. I. Nikitin, L.G. Shpinkova

Publikováno v: Acta Physica Polonica A. 100:799-805

Static and dynamic electric quadrupole interactions of 1 1 1 Cd in complexes with diethylenetriaminepentaacetic acid were studied by the time differential perturbed angular γγ-correlation technique using two parent isotopes, 1 1 1 In(EC) 1 1 1 Cd a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::500860d10230a2f9e02056bec92f6491
https://doi.org/10.12693/aphyspola.100.799

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