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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Bibliographic Details
Published in:	Physica 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
Language:	English
Published:	Berlin WILEY-VCH Verlag 01-04-2011 WILEY‐VCH Verlag Wiley-VCH
Subjects:	Charging Condensed matter: electronic structure, electrical, magnetic, and optical properties Domain effects, magnetization curves, and hysteresis electrochemical charging Electrolytes Exact sciences and technology Fe2O3 interfaces magnetic properties Magnetic properties and materials Magnetization Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects Nanocomposites nanocrystalline materials Nanomaterials Nanoparticles Nanostructure Physics Surface chemistry interfaces Iron oxide nanocrystalline materials Magnetization electrochemical charging Electrochemical method Porous materials Magnetic moments Desorption O Nanoparticles magnetic properties Adsorption Nanocomposites Platinum Transition elements Nanocrystal Fe
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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.
Bibliography:	Austrian Science Fund (FWF) - No. S10405-N16; No. S10407-N16 Funded Access ark:/67375/WNG-M1G3XD97-V istex:7EFD61C8099AD262D713B66C224AE298A430CB97 ArticleID:PSSR201004483 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1862-6254 1862-6270 1862-6270
DOI:	10.1002/pssr.201004483