Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1802491 | Journal of Magnetism and Magnetic Materials | 2009 | 4 Pages |
Abstract
The measurement of temperature variations in adiabatic conditions allows the determination of the specific absorption rate of magnetic nanoparticles and ferrofluids from the correct incremental expression, SAR=(1/mMNP)C(ÎT/Ît). However, when measurements take place in non-adiabatic conditions, one must approximate this expression by SARâCβ/mMNP, where β is the initial slope of the temperature vs. time curve during alternating field application. The errors arising from the use of this approximation were estimated through several experiments with different isolating conditions, temperature sensors and sample-sensor contacts. It is concluded that small to appreciable errors can appear, which are difficult to infer or control.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Eva Natividad, Miguel Castro, Arturo Mediano,