Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/125268
Title: Magnetic iron nanoparticles in carbon nanotubes
Author: Teixidó Villanueva, Alba
Director: Tejada Palacios, Javier
Calvo de la Rosa, Jaume
Keywords: Nanopartícules
Nanotubs
Treballs de fi de grau
Nanoparticles
Nanotubes
Bachelor's thesis
Issue Date: Jun-2018
Abstract: In this work we have studied the magnetic properties of iron nanoparticles mixed with carbon nanotubes. The ZFC-FC curves, M(H) loops and the magnetic relaxation were measured using a SQUID-magnetometer (Superconducting Quantum Interference Detector device). The ZFC and FC processes have been measured with an applied field of 100, 2000, 3000 and 5000 Oe, respectively. The ZFC curves show two peaks which may correspond to two different blocking temperatures. The energy barriers distribution was studied from the derivative of the difference between ZFC and FC curves with respect to temperature . Isothermal hysteresis loops M(H) show a higher coercitivity and irreversability with decreasing temperature. The magnetic relaxation measurements were performed down to 2K.The magnetic viscosity shows a linear dependence with temperature. Moreover we have also measured the complex permittivity in the frequency range of 200 MHz and 20 GHz and real and imaginary components of the magnetic susceptibility between 2-300K when 10 Hz and 1000 Hz frequencies were applied
Note: Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2018, Tutors: Javier Tejada Palacios, Jaume Calvo de la Rosa
URI: http://hdl.handle.net/2445/125268
Appears in Collections:Treballs Finals de Grau (TFG) - Física

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