Title :
Self-regulated magnetic induction heating Of Zn-Co ferrite nanoparticles
Author :
Gomez-Polo, C. ; Larumbe, S. ; Beato-Lopez, J. ; Mendonca, E. ; De Meneses, C. ; Duque, J.
Author_Institution :
Univ. Publica de Navarra, Pamplona, Spain
Abstract :
The aim of this work is to present a comparative study of the magnetic properties and the self-heating (magnetic hyperthermia) characteristics of CoxZn1-xFe2O4 nanoparticles prepared by co-precipitation method and annealed in air at 400°C for 6 hours. Rietveld analysis of the X-ray diffraction patterns show a single phase spinel structure with mean grain sizes (estimated through Sherrer´s formula) around 6-10 nm. Magnetic measurements are performed using a SQUID magnetometer. The optimum heating efficiency for intermediate Zn substitutions is interpreted as a consequence of different factors (Curie temperature, magnetic moment, grain size) controlling the actual magnetization process at room temperature in these nanoparticles.
Keywords :
Curie temperature; SQUID magnetometry; X-ray diffraction; annealing; biomedical materials; cobalt compounds; electromagnetic induction; ferrites; grain size; hyperthermia; induction heating; magnetic moments; magnetic particles; magnetisation; nanofabrication; nanomagnetics; nanomedicine; nanoparticles; precipitation (physical chemistry); zinc compounds; CoxZn1-xFe2O4; Curie temperature; Rietveld analysis; SQUID magnetometry; Sherrer formula; X-ray diffraction; annealing; coprecipitation; ferrite nanoparticles; grain sizes; magnetic hyperthermia; magnetic moment; magnetization; self-regulated magnetic induction heating; single phase spinel structure; temperature 293 K to 298 K; temperature 400 degC; time 6 h; Grain size; Magnetic fields; Magnetometers; Nanoparticles; Temperature; Zinc;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157443
