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Showing papers by "Miguel A. Novak published in 2008"

Journal Article•DOI•
Cobalt nanocubes in ionic liquids: synthesis and properties.

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Morgana Scariot1, Dagoberto O. Silva1, Jackson D. Scholten1, Giovanna Machado2, Sérgio R. Teixeira1, Miguel A. Novak3, Guenter Ebeling1, Jairton Dupont1 •
Universidade Federal do Rio Grande do Sul1, University of Caxias do Sul2, Federal University of Rio de Janeiro3
10 Nov 2008-Angewandte Chemie

111 citations

Journal Article•DOI•
Investigation of the static and dynamic magnetic properties of CoFe2O4 nanoparticles

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J. L. López, H.-D. Pfannes1, Roberto M. Paniago1, J.P. Sinnecker2, Miguel A. Novak2 •
Universidade Federal de Minas Gerais1, Federal University of Rio de Janeiro2
01 Jul 2008-Journal of Magnetism and Magnetic Materials
TL;DR: In this article, the magnetic behavior of cobalt ferrite nanoparticles with a mean diameter of 72nm was investigated as a function of temperature T from 2 to 300 K under zero external DC field for frequencies ranging from f=10 to 10,000 Hz.

66 citations

Journal Article•DOI•
Synthesis, structure, electronic and magnetic properties of two new complexes obtained by coordination of Co(II) and Mn(II) phenyltrifluoroacetylacetonate with a nitronyl nitroxide radical

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Denise A. Souza1, Antonio S. Florencio1, José Walkimar de M. Carneiro1, Stéphane Soriano1, Carlos B. Pinheiro2, Miguel A. Novak3, Maria G. F. Vaz1 •
Federal Fluminense University1, Universidade Federal de Minas Gerais2, Federal University of Rio de Janeiro3
01 Oct 2008-Inorganica Chimica Acta
TL;DR: In this article, two new magnetic compounds were obtained by using β-diketonate 1,3-butanedione, 4,4,4-trifluoro-1-phenyl (Phtfac) as ligand.

21 citations

Journal Article•DOI•
Low temperature specific heat of the single molecule magnet Fe8

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A. M. Gomes1, Miguel A. Novak1, Wallace C. Nunes1, R.E. Rapp1•
Federal University of Rio de Janeiro1
01 Oct 2008-Inorganica Chimica Acta
TL;DR: In this paper, the authors present low temperature specific heat and ac-susceptibility measurements of Fe8 powdered sample, attributed to a splitting of the ground state doublet in an inhomogeneous local field of hyperfine and dipolar origin.

3 citations