2024-03-30T08:58:12Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/213792016-02-16T06:30:18Zcom_10261_31com_10261_3col_10261_284
Accurate measurement of the specific absorption rate using a suitable adiabatic magnetothermal setup
Natividad, Eva
Castro, Miguel
Mediano, Arturo
3 pages, 3 figures.
Accurate 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%.
2010-02-19T12:00:01Z
2010-02-19T12:00:01Z
2008-03-05
artÃculo
Applied Physics Letters 92(9): 093116 (2008)
0003-6951
http://hdl.handle.net/10261/21379
10.1063/1.2891084
eng
http://dx.doi.org/10.1063/1.2891084
openAccess
American Institute of Physics