A study of the frequency dependent susceptibility of a colloidal suspension of manganese ferrite (MnFe2O4) nanoparticles

Authors
Fannin, PC Vincent, D Massart, G Perov, P Neveu, S
Citation
Pc. Fannin et al., A study of the frequency dependent susceptibility of a colloidal suspension of manganese ferrite (MnFe2O4) nanoparticles, EPJ-APPL PH, 8(3), 1999, pp. 247-251
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
ISSN journal
12860042 → ACNP
Volume
8
Issue
3
Year of publication
1999
Pages
247 - 251
Database
ISI
SICI code
1286-0042(199912)8:3<247:ASOTFD>2.0.ZU;2-B
Abstract
Measurements of the complex, frequency dependent susceptibility, chi(omega) = chi'(omega) - i chi "(omega) over the frequency range 50 MHz to 15 GHz, of a surfacted ferrofluid comprising MnFe2O4 ferrite particles in dibutylph thalat, (DBP), as a function of a biasing magnetic field are presented. The biasing field was varied over the range 0 to 100 kAm(-1), and has enabled average values of anisotropy constant, (K) over bar, and anisotropy field ( H) over bar(A) for the sample to be determined. Ferromagnetic resonance was exhibited for all values of the biasing field, covering the range 1.2 to 8 .5 GHz, with the chi'(omega) component of the susceptibility going negative in the GHz region.