M
Marcelo Knobel
Researcher at State University of Campinas
Publications - 359
Citations - 9004
Marcelo Knobel is an academic researcher from State University of Campinas. The author has contributed to research in topics: Magnetization & Amorphous solid. The author has an hindex of 44, co-authored 354 publications receiving 8243 citations. Previous affiliations of Marcelo Knobel include Federico Santa María Technical University & Polytechnic University of Turin.
Papers
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Superparamagnetism and other magnetic features in granular materials: A review on ideal and real systems
Marcelo Knobel,Wallace C. Nunes,Leandro M. Socolovsky,E. De Biasi,Jose M. Vargas,Juliano C. Denardin +5 more
TL;DR: An overview on magnetic of nanostructured magnetic materials is presented, with particular emphasis on the basic features displayed by granular nanomagnetic solids.
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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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Giant magnetoimpedance: concepts and recent progress
Marcelo Knobel,Kleber R. Pirota +1 more
TL;DR: The giant magneto-impedance effect (GMI) as mentioned in this paper is a phenomenon that changes the complex impedance of soft magnetic materials upon the application of an external magnetic field, which is strongly dependent on the frequency of the applied current and the magnetic anisotropies present in the material, among other factors.
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Thermoremanence and zero-field-cooled/field-cooled magnetization study of Co x ( SiO 2 ) 1 − x granular films
Juliano C. Denardin,A.L. Brandl,Marcelo Knobel,P. Panissod,A. B. Pakhomov,Hui Liu,Xixiang Zhang +6 more
TL;DR: In this paper, a systematic study of granular films by means of transmission electron microscopy (TEM), dc and ac initial magnetic susceptibility, and thermoremanent magnetization (TRM) is presented.
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Effect of dipolar interaction observed in iron-based nanoparticles
TL;DR: In this article, spherical magnetic nanoparticles with narrow size distribution and organic capping were diluted in paraffin with different concentrations to verify the role of dipolar interactions on the macroscopic magnetic behavior.