Issue 22, 2015
From the journal:

RSC Advances

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

Surender K. Sharma,*abc   Jose Marcelo Vargas,d   Nicolás Manuel Vargas,e   Sebastian Castillo-Sepúlveda,e   Dora Altbir,e   Kleber Roberto Pirota,a   Radek Zboril,c   Giorgio Zoppellaroc  and  Marcelo Knobel*a  

* Corresponding authors

a Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas (UNICAMP) Campinas, 13.083-859, SP, Brazil
E-mail: surender76@gmail.com, knobel@ifi.unicamp.br

b Laboratoire Interfaces Traitements Organisation et Dynamique des Systemes (ITODYS), UMR 7086 CNRS & Universite Paris Diderot-Paris 7, Case 7090, 75205 Paris, Cedex 13, France

c Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University Olomouc, 771 46 Olomouc, Czech Republic

d Centro Atomico Bariloche, 8400 S. C. de Bariloche, RN, Argentina

e Physics Department, Universidad de Santiago de Chile and CEDENNA, USACH, Santiago 917-0124, Chile

Abstract

The static and dynamic magnetic response of the newly synthesized CoFe2O4–Ag hetero nano-system showed significant enhancement in the effective energy barrier and reduction of the magnetic hardness of CoFe2O4 upon interaction with non-magnetic Ag as compared to neat CoFe2O4. The observed magnetic properties of CoFe2O4–Ag have been dissected in detail using the superparamagnetic Stoner–Wohlfarth and Neel–Arrhenius/Vogel–Fulcher models with the aid of micromagnetic simulations.

Graphical abstract: Unusual magnetic damping effect in a silver–cobalt ferrite hetero nano-system

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Article information

DOI
https://doi.org/10.1039/C4RA14960B
Article type
Communication
Submitted
20 Nov 2014
Accepted
29 Jan 2015
First published
09 Feb 2015

RSC Adv., 2015,5, 17117-17122

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

S. K. Sharma, J. M. Vargas, N. M. Vargas, S. Castillo-Sepúlveda, D. Altbir, K. R. Pirota, R. Zboril, G. Zoppellaro and M. Knobel, RSC Adv., 2015, 5, 17117 DOI: 10.1039/C4RA14960B

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