Magnetization of Fe‐oxide based nanocomposite tuned by surface charging

Aiming at a voltage‐control of magnetism, the magnetization of a porous γ‐Fe2O3–Pt nanocomposite is studied under the influence of charging the surfaces of the porous structure in an electrolyte. Reversible variations of the magnetization of up to 10.4% could be achieved upon charging in the regime...

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Published inPhysica status solidi. PSS-RRL. Rapid research letters Vol. 5; no. 4; pp. 150 - 152
Main Authors Traußnig, Thomas, Topolovec, Stefan, Nadeem, Kashif, Vinga Szabó, Dorothée, Krenn, Heinz, Würschum, Roland
Format Journal Article
LanguageEnglish
Published Berlin WILEY‐VCH Verlag 01.04.2011
Subjects
electrochemical charging
Fe2O3
interfaces
magnetic properties
nanocrystalline materials
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Summary:Aiming at a voltage‐control of magnetism, the magnetization of a porous γ‐Fe2O3–Pt nanocomposite is studied under the influence of charging the surfaces of the porous structure in an electrolyte. Reversible variations of the magnetization of up to 10.4% could be achieved upon charging in the regime where electrochemical adsorption and desorption occurs. The observed variation of the magnetization with electrochemical charging is assigned to the γ‐Fe2O3 nanoparticles whereas the conductive network of Pt nanoparticles is necessary for charging. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) In this Letter, the magnetization of a porous γ‐Fe2O3–Pt nanocomposite is studied under the influence of charging the surfaces of the porous structure in an electrolyte. Reversible variations of the magnetization of up to 10.4% could be achieved upon charging. The present concept of tuning of magnetization may open up one promising niche path towards the current challenging efforts of controlling magnetism by electric fields.
ISSN:1862-6254
1862-6270
DOI:10.1002/pssr.201004483