M
Miguel A. Novak
Researcher at Federal University of Rio de Janeiro
Publications - 119
Citations - 8511
Miguel A. Novak is an academic researcher from Federal University of Rio de Janeiro. The author has contributed to research in topics: Magnetization & Magnetic susceptibility. The author has an hindex of 34, co-authored 118 publications receiving 8148 citations. Previous affiliations of Miguel A. Novak include Centre national de la recherche scientifique.
Papers
More filters
Journal ArticleDOI
Quantum tunneling of magnetization in Mn12Bz clusters: Evidences of spin parity effect
A. M. Gomes,Miguel A. Novak,Wolfgang Wernsdorfer,Roberta Sessoli,Lorenzo Sorace,Dante Gatteschi +5 more
TL;DR: In this paper, a comparison of the field dependence of the relaxation times observed for Mn12Bz, (Bz=benzoate) spin cluster, and its derivative containing one extra electron, r-Mn 12Bz is presented.
Journal ArticleDOI
Anisotropic magnetic carbon materials based on graphite and magnetite nanoparticles
TL;DR: Magnetic graphite materials (GMag) were prepared by adsorbing oleate coated magnetite nanoparticles (MagNP) on the exposed surfaces of graphite, in the powder form as discussed by the authors.
Journal ArticleDOI
Synthesis, structural and magnetic characterization of a new copper(II)-nitronyl nitroxide radical complex
Marguerite Kalisz,Marguerite Kalisz,Miguel A. Novak,Carlos B. Pinheiro,Carlos B. Pinheiro,Antonio S. Florencio,Gervais Chapuis,Andrea Caneschi,Maria G. F. Vaz +8 more
TL;DR: In this paper, the structure and magnetic properties of a new copper-II-NITcomplex were described, where NIT stands for nitronyl nitroxide radical (NIT) radical.
Journal ArticleDOI
Synthesis, Crystal Structure and Magnetic Properties of Heteropolynuclear ReIVMII Complexes Based on the Robust [ReCl5(pyzCOO)]2– Unit (pyzCOO = 2-pyrazinecarboxylate)
Livia Arizaga,Ricardo González,Donatella Armentano,Giovanni De Munno,Miguel A. Novak,Francesc Lloret,Miguel Julve,Carlos Kremer,Raúl Chiozzone +8 more
TL;DR: In this article, the magnetic properties of four rhenium(IV) compounds of formulae NBu4[ReCl5(pyzCOOH)]·H2O (1), [ReCl 5(µ-pyz COO)M(dmphen)2]·2CH3CN [M = Ni (2), Co (3), Mn (4)] and dmphen in acetonitrile.
Journal ArticleDOI
Synthesis, Magnetic and High-Field EPR Investigation of Two Tetranuclear NiII-Based Complexes
Lívia B. L. Escobar,Lívia B. L. Escobar,Guilherme P. Guedes,Stéphane Soriano,Jonathan Marbey,Stephen Hill,Miguel A. Novak,Maria G. F. Vaz +7 more
TL;DR: Two tetranuclear compounds with a cubane-like structure were synthesized from a one-pot reaction between NiII and 2,2,6,6-tetramethyl-3,5-heptanedione for 1 or 4,4,4-trifluoro-1-phenyl-1,3-butanedione (Hbta) for 2 in the presence of sodium methoxide.