Document type
ArticleVersion
Published versionPublication date
All rights reserved
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10652
Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
Abstract
The static and dynamic magnetic properties of nanocrystalline BaFe10.4Co0.8Ti0.8O19 M-type doped barium
ferrite were studied in detail to clarify the effect of interactions on the magnetic relaxation of an assembly of
small particles. The logarithmic approximation was unable to account for the magnetic relaxation of the
sample. Interaction effects were analyzed from the low-field susceptibility, DM plots and the time dependence
of thermoremanence, indicating that demagnetizing interactions led to an enhancement of both the relaxation
rate at low temperatures and the amount of the lowest energy barriers. It is thus suggested that care should be
taken when analyzing thermoremanent data at low temperature, in order not to confuse these experimental
findings with the signature of macroscopic quantum tunneling.
Subject (English)
Citation
Citation
BATLLE GELABERT, Xavier, GARCÍA DEL MURO Y SOLANS, Montserrat and LABARTA, Amílcar. Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites. Physical Review B. 1997. Vol. 55, num. 10, pags. 6440-6445. ISSN 0163-1829. [consulted: 17 of August of 2026]. Available at: https://hdl.handle.net/2445/10652