The impact of fluctuation of AC field on the precision of magnetic nanothermometer

Magnetic nanoparticle temperature estimation by AC magnetization spectrum is a novel, precise and noninvasive temperature measurement approach^[1-5]. Fluctuation of AC applied magnetic field is one of important impact factors that leading to temperature error. This study aims to evaluate the impact of the fluctuation of AC applied magnetic field upon the accuracy of the temperature estimation while using AC magnetic fields to assess the information. Because the frequency spectrum of the magnetization is sensitive to the temperature, the harmonic amplitude of AC magnetization allows temperature estimation. Therefore, the fluctuation of AC applied magnetic field leads to temperature error.