OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Magnetic anisotropy determination and magnetic hyperthermia properties of small Fe nanoparticles in the superparamagnetic regime

Mehdaoui, Boubker and Meffre, Anca and Lacroix, Lise-Marie and Carrey, Julian and Lachaize, Sébastien and Respaud, Marc and Gougeon, Michel and Chaudret, Bruno Magnetic anisotropy determination and magnetic hyperthermia properties of small Fe nanoparticles in the superparamagnetic regime. (2010) Journal of Applied Physics, vol. 107 (n° 9). ISSN 0021-8979

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
547kB

Official URL: http://dx.doi.org/10.1063/1.3348795

Abstract

We report on the magnetic and hyperthermia properties of 5.5 nm in diameter iron nanoparticles synthesized by organometallic chemistry, which display the bulk magnetization. Quantitative analysis of alternative susceptibility measurements allows the determination of the effective anisotropy Keff = 1.3×105 J m−3. Hyperthermia measurements are performed at a magnetic field up to 66 mT and at frequencies in the range of 5–300 kHz. Maximum measured specific absorption rate (SAR) is 280 W/g. SAR displays a square dependence with the magnetic field below 30 mT but deviates from this power law at higher value. SAR is linear with the applied frequency for μ0H = 19 mT. These results are discussed in the light of linear response theory.

Item Type:Article
Additional Information:Thanks to AIP editor. The definitive version is available at http://www.aip.org/ The original PDF of the article can be found at Journal of Applied Physics website : http://jap.aip.org/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Laboratory name:
Statistics:download
Deposited By: Leila Abdelouhab
Deposited On:31 May 2011 13:04

Repository Staff Only: item control page