Unusual magnetic damping effect in a silver-cobalt ferrite hetero nano-system

The static and dynamic magnetic response of the newly synthesized CoFe 2 O 4 -Ag hetero nano-system showed significant enhancement in the effective energy barrier and reduction of the magnetic hardness of CoFe 2 O 4 upon interaction with non-magnetic Ag as compared to neat CoFe 2 O 4 . The observed...

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Bibliographic Details
Published in:RSC advances 2015-01, Vol.5 (22), p.17117-17122
Main Authors: Sharma, Surender K, Vargas, Jose Marcelo, Vargas, Nicolás Manuel, Castillo-Sepúlveda, Sebastian, Altbir, Dora, Pirota, Kleber Roberto, Zboril, Radek, Zoppellaro, Giorgio, Knobel, Marcelo
Format: Article
Language:English
Subjects:
Computer simulation
Damping
Dynamics
Ferrite
Hardness
Magnetic properties
Nanostructure
Silver
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Summary:The static and dynamic magnetic response of the newly synthesized CoFe 2 O 4 -Ag hetero nano-system showed significant enhancement in the effective energy barrier and reduction of the magnetic hardness of CoFe 2 O 4 upon interaction with non-magnetic Ag as compared to neat CoFe 2 O 4 . The observed magnetic properties of CoFe 2 O 4 -Ag have been dissected in detail using the superparamagnetic Stoner-Wohlfarth and Neel-Arrhenius/Vogel-Fulcher models with the aid of micromagnetic simulations. The analysis of static and dynamic magnetic response of CoFe 2 O 4 -Ag hetero nano-system revealed, with the aid of micromagnetic simulations, a severe alteration of the magnetic relaxation behaviour of CoFe 2 O 4 upon interaction with non-magnetic Ag.
ISSN:2046-2069
2046-2069
DOI:10.1039/c4ra14960b