Nano-sized magnetic particles show great promise in improving the performance of microwave absorbers with respect to the corresponding bulk materials. In this paper, magnetically hard and soft ferrite nanoparticles (CoFe2O4 and Fe3O4) having an average size of 14 and 11 nm were prepared by co-precipitation method and characterized in terms of morphology, structure, and magnetic properties. Their permeability and permittivity were measured by a waveguide technique, embedding each sample in a host medium. Their parameters at microwave frequencies were retrieved by comparing different effective medium equations.
Microwave characterization of magnetically hard and soft ferrite nanoparticles in K-band / C. Della Pina, E. Falletta, A. M. Ferretti, A. Ponti, G. G. Gentili, V. Verri, R. Nesti. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 116:15(2014), pp. 154306.1-154306.8. [10.1063/1.4898138]
Microwave characterization of magnetically hard and soft ferrite nanoparticles in K-band
C. Della Pina;E. Falletta;
2014
Abstract
Nano-sized magnetic particles show great promise in improving the performance of microwave absorbers with respect to the corresponding bulk materials. In this paper, magnetically hard and soft ferrite nanoparticles (CoFe2O4 and Fe3O4) having an average size of 14 and 11 nm were prepared by co-precipitation method and characterized in terms of morphology, structure, and magnetic properties. Their permeability and permittivity were measured by a waveguide technique, embedding each sample in a host medium. Their parameters at microwave frequencies were retrieved by comparing different effective medium equations.File | Dimensione | Formato | |
---|---|---|---|
J Appl Physics 2014.pdf
accesso riservato
Tipologia:
Publisher's version/PDF
Dimensione
1.37 MB
Formato
Adobe PDF
|
1.37 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.