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.
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Magnetic bistability in a metal-ion cluster
TL;DR: In this article, it was shown that the magnetization of the Mn12 cluster is highly anisotropic and the magnetisation relaxation time becomes very long below a temperature of 4 K, giving rise to pronounced hysteresis.
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Cobalt(II)‐Nitronyl Nitroxide Chains as Molecular Magnetic Nanowires
Andrea Caneschi,Dante Gatteschi,Nikolia Lalioti,Claudio Sangregorio,Roberta Sessoli,G. Venturi,Alessandro Vindigni,Angelo Rettori,Maria Gloria Pini,Miguel A. Novak +9 more
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A ferromagnetic transition at 1.48 K in an organic nitroxide
TL;DR: In this paper, the existence of a ferromagnetic transition in a purely organic, non-ionic material with a Curie temperature of 1.48 ± 0.02 K was reported.
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Granular Cu-Co alloys as interacting superparamagnets
Paolo Maria Eugenio Icilio Allia,Marco Coïsson,Paola Tiberto,Franco Vinai,Marcelo Knobel,Miguel A. Novak,Wallace C. Nunes +6 more
TL;DR: In this article, a phenomenological theory is proposed, explicitly considering that particle moments interact through long-ranged dipolar random forces, whose effect is pictured in terms of a temperature ${T}^{*}, adding to the actual temperature T in the denominator of the Langevin function argument.
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The molecular approach to nanoscale magnetism
Andrea Caneschi,Dante Gatteschi,Claudio Sangregorio,Roberta Sessoli,Lorenzo Sorace,Andrea Cornia,Miguel A. Novak,C. Paulsen,Wolfgang Wernsdorfer +8 more
TL;DR: In this paper, the role of transverse anisotropy in the dynamics of the magnetization is elucidated through the comparison of the tunneling rate of two Fe8 cluster compounds.