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Título

Accurate measurement of the specific absorption rate using a suitable adiabatic magnetothermal setup

AutorNatividad, Eva; Castro, Miguel; Mediano, Arturo
Fecha de publicación5-mar-2008
EditorAmerican Institute of Physics
CitaciónApplied Physics Letters 92(9): 093116 (2008)
ResumenAccurate measurements of the specific absorption rate (SAR) of solids and fluids were obtained by a calorimetric method, using a special-purpose setup working under adiabatic conditions. Unlike in current nonadiabatic setups, the weak heat exchange with the surroundings allowed a straightforward determination of temperature increments, avoiding the usual initial-time approximations. The measurements performed on a commercial magnetite aqueous ferrofluid revealed a good reproducibility (4%). Also, the measurements on a copper sample allowed comparison between experimental and theoretical values: adiabatic conditions gave SAR values only 3% higher than the theoretical ones, while the typical nonadiabatic method underestimated SAR by 21%.
Descripción3 pages, 3 figures.
Versión del editorhttp://dx.doi.org/10.1063/1.2891084
URIhttp://hdl.handle.net/10261/21379
DOI10.1063/1.2891084
ISSN0003-6951
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