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.
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Giant magneto-impedance effect in nanostructured magnetic wires
TL;DR: In this article, the giant magneto-impedance effect (GMI) was studied as a function of the structural modification induced in an Fe73.5Si13.5B9Cu1Nb3 amorphous alloy wire by annealing.
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Magnetic properties and giant magnetoresistance of melt-spun granular Cu-100-x Co-x alloys
TL;DR: A general expression for the magnetoresistance in granular magnetic systems is obtained, and shown to accurately fit all the experimental curves, indicating that this effect is basically determined by the ratios between two distinct correlation ranges for the magnetic-moment fluctuations and the electronic mean free path.
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Giant magnetoimpedance effect in soft magnetic wires for sensor applications
TL;DR: The giant magneto-impedance effect (GMI) as mentioned in this paper describes the large relative change of the impedance observed in magnetically very soft ribbon and wire alloys under the application of dc magnetic fields (units of kA m 1 ).
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Influence of the distribution of magnetic moments on the magnetization and magnetoresistance in granular alloys
TL;DR: In this article, the dependence of the magnetoresistance on the magnetization is investigated by means of a theoretical model that is developed taking explicitly into account the magnetic moment distribution and the spin-dependent electron-impurity scattering within magnetic grains and at the interface between the grains and the metallic matrix.
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Influence of stirring velocity on the synthesis of magnetite nanoparticles (Fe3O4) by the co-precipitation method
R. Valenzuela,María Cecilia Fuentes,Carolina Parra,Jaime Baeza,Nelson Durán,Surender K. Sharma,Marcelo Knobel,Juanita Freer +7 more
TL;DR: In this paper, superparamagnetic magnetite nanoparticles (mean diameter ∼10nm) were synthesized using the co-precipitation route from Fe2+/Fe3+ in aqueous solutions (molar ratio 1:2) by adding a base under mechanical stirring at 10,000rpm.