Search Results - "Pirota, K.R."

Magnetic hyperthermia in brick-like Ag@Fe3O4 core–shell nanoparticles by Brollo, M.E.F., Orozco-Henao, J.M., López-Ruiz, R., Muraca, D., Dias, C.S.B., Pirota, K.R., Knobel, M.

“…Heating efficiency of multifunctional Ag@Fe3O4 brick-like nanoparticles under alternating magnetic field was investigated by means of specific absorption rate…”
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Influence of aspect ratio and anisotropy distribution in ordered CoNi nanowire arrays by Rosa, W.O., Vivas, L.G., Pirota, K.R., Asenjo, A., Vázquez, M.

“…The size effects on magnetic properties of nanowires arrays were studied varying the nanowires diameter and maintaining the same periodicity among them, for…”
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Structural and magnetic behavior of ferrogels obtained by freezing thawing of polyvinyl alcohol/poly(acrylic acid) (PAA)-coated iron oxide nanoparticles by Moscoso-Londoño, O., Gonzalez, J.S., Muraca, D., Hoppe, C.E., Alvarez, V.A., López-Quintela, A., Socolovsky, L.M., Pirota, K.R.

“…[Display omitted] ► Ferrogels were obtained by freezing thawing of PVA/PAA-coated magnetic NPs. ► Strong H-bonding between PAA–PVA allowed homogeneous…”
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Magnetic properties and giant magnetoimpedance in a CoFeSiB glass-covered microwire by Pirota, K.R, Kraus, L, Chiriac, H, Knobel, M

“…The influence of current annealing on magnetic properties of Joule-heated amorphous Co 68.25Fe 4.5Si 12.25B 15 glass-covered microwire (29.3 μm) is…”
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Buoyancy organic Rankine cycle by Schoenmaker, J., Rey, J.F.Q., Pirota, K.R.

“…In the scope of renewable energy, we draw attention to a little known technique to harness solar and geothermal energy. The design here proposed and analyzed…”
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About the dipolar approach in magnetostatically coupled bistable magnetic micro and nanowires by Velazquez, J., Pirota, K.R., Vazquez, M.

“…The dipolar approximation has been recently considered in order to account for the magnetostatic interaction in arrays of bistable magnetic micro and nanowires…”
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High-frequency GMI hysteresis effect analysis by first-order reversal curve (FORC) method by Arzuza, L.C.C., Béron, F., Pirota, K.R.

“…In this work, we investigate the giant magnetoimpedance (GMI) hysteresis at high-frequency (10 MHz – 1 GHz) of Co-based amorphous magnetic ribbons. The…”
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Effects of Nanostructure and Dipolar Interactions on Magnetohyperthermia in Iron Oxide Nanoparticles by Orozco-Henao, J. M, Coral, D. F, Muraca, D, Moscoso-Londoño, O, Mendoza Zélis, P, Fernandez van Raap, M. B, Sharma, S. K, Pirota, K. R, Knobel, M

“…Magnetohyperthermia properties of magnetic nanoparticle colloids are strongly affected by their intrinsic magnetic properties and dipolar interactions among…”
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Domain wall propagation tuning in magnetic nanowires through geometric modulation by Arzuza, L.C.C., López-Ruiz, R., Salazar-Aravena, D., Knobel, M., Béron, F., Pirota, K.R.

“…•The modulated nanowires dynamics occurs through two reversal modes.•Modulated nanowires show a change in the χ in contrast to homogeneous ones.•The FORC…”
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Giant magnetoimpedance: concepts and recent progress by Knobel, M., Pirota, K.R.

“…The giant magnetoimpedance effect (GMI) consists in drastic changes of the complex impedance of soft magnetic materials upon the application of an external…”
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Different approaches to analyze the dipolar interaction effects on diluted and concentrated granular superparamagnetic systems by Moscoso-Londoño, O., Tancredi, P., Muraca, D., Mendoza Zélis, P., Coral, D., Fernández van Raap, M.B., Wolff, U., Neu, V., Damm, C., de Oliveira, C.L.P., Pirota, K.R., Knobel, M., Socolovsky, L.M.

“…Controlled magnetic granular materials with different concentrations of magnetite nanoparticles immersed in a non-conducting polymer matrix were synthesized…”
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Cubic to hexagonal tuning in Fe2Mn(Si1−xGex) Heusler alloys by Pimentel, B., Andrade, V.M., Paula, V.G. de, Pirota, K.R., Béron, F., Cardoso, M.A., Gonçalves, J.N., S. Amaral, J., Santos, A.M. dos, Reis, M.S.

“…•Construction of a phase diagram for the Fe2Mn(Si1−xGex) family compounds.•Critical volume of ~ 12 Å3/atom per unit cell for the formation of hexagonal…”
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Optical and magnetic nanocomposites containing Fe3O4@SiO2 grafted with Eu3+ and Tb3+ complexes by Khan, L.U., Muraca, D., Brito, H.F., Moscoso-Londoño, O., Felinto, M.C.F.C., Pirota, K.R., Teotonio, E.E.S., Malta, O.L.

“…The fabrication of bifunctional nanocomposites, co-assembling photonic (RE3+) and magnetic (Fe3O4) features into single entity nanostructures is reported…”
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Optical and magnetic nanocomposites containing Fe 3 O 4 @SiO 2 grafted with Eu 3+ and Tb 3+ complexes by Khan, L.U., Muraca, D., Brito, H.F., Moscoso-Londoño, O., Felinto, M.C.F.C., Pirota, K.R., Teotonio, E.E.S., Malta, O.L.

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Effect of zinc concentration on the magnetic properties of cobalt–zinc nanoferrite by Rani, Ritu, Sharma, S.K., Pirota, K.R., Knobel, M., Thakur, Sangeeta, Singh, M.

“…Nano-cobalt–zinc ferrite (CZFO) Co(1−x)ZnxFe2O4 with varied quantities of zinc (x=0.0, 0.1, 0.2, 0.3, 0.4) have been prepared by solution combustion method…”
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Synthesis, structural and magnetic characterization of highly ordered single crystalline BiFeO3 nanotubes by de Oliveira, L.A.S., Pirota, K.R.

“…[Display omitted] ► Highly ordered BiFeO3 nanotubes with 65nm of diameter and 3μm of length. ► Its morphology is smooth revealing, by TEM, a single crystalline…”
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Synthesis and ageing effect in FeO nanoparticles: Transformation to core-shell FeO/Fe3O4 and their magnetic characterization by SHARMA, S. K, VARGAS, J. M, PIROTA, K. R, KUMAR, Shalendra, LEE, C. G, KNOBEL, M

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A stochastic model for magnetic dynamics in single-molecule magnets by López-Ruiz, R., Almeida, P.T., Vaz, M.G.F., Novak, M.A., Béron, F., Pirota, K.R.

“…Hysteresis and magnetic relaxation curves were performed on double well potential systems with quantum tunneling possibility via stochastic simulations…”
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Room temperature ferromagnetism in Fe-doped CeO2 thin films grown on LaAlO3 (001) by SHARMA, S. K, THAKUR, P, KUMAR, Shalendra, SHUKLA, D. K, BROOKES, N. B, LEE, C. G, PIROTA, K. R, KOO, B. H, KNOBEL, M

“…Ce1axFexO2aI/LaAlO3(001) thin films (x=0.01 and 0.03) have been prepared by pulsed laser deposition method and thoroughly characterized using X-ray diffraction…”
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Novel magnetic materials prepared by electrodeposition techniques: arrays of nanowires and multi-layered microwires by Pirota, K.R., Navas, D., Hernández-Vélez, M., Nielsch, K., Vázquez, M.

“…The fabrication process by electrodeposition routes and the study of general magnetic properties is reported for two types of nanostructured magnetic…”
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