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Title: Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites
Author: Batlle Gelabert, Xavier
García del Muro y Solans, Montserrat
Labarta, Amílcar
Keywords: Matèria condensada
Propietats magnètiques
Magnetic properties
Condensed matter
Issue Date: 1997
Publisher: The American Physical Society
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.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1997, vol. 55, núm. 10, p. 6440-6445
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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