Magnetic nanoparticle temperature estimation: The improvement of measurement speed

The noninvasive nanoscale thermometer with high measurement speed will become a very promising research. The speed of the temperature estimation using the model of AC magnetization spectrum is limited by the frequency of AC applied magnetic field [1-3]. You may need MHz magnetic field to get a faster temperature measuring or even higher frequency, and it would require a huge power to support the magnetic field and maintain the strength. So it is very difficult to guarantee the stability of the magnetic field. Instead of using AC magnetic field, DC magnetic field has a wider room for improvement of measurement speed.