Effect of core size distribution on magnetic nanoparticle harmonics for thermometry

Zhongzhou Du, Yi Sun, Oji Higashi, Yuki Noguchi, Keiji Enpuku, Sebastian Draack, Klaas Julian Janssen, Tamara Kahmann, Jing Zhong, Thilo Viereck, Frank Ludwig, Takashi Yoshida

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We investigated the effect of core size distribution on the performance of a magnetic nanoparticle thermometer (MNPT) in circumstances when Neél relaxation dominates the dynamic behavior of particles. Numerical simulations revealed the effects of excitation field strength and core size distribution on the temperature dependence of the amplitude and phase of harmonics. In MNPT, the field dependences of sensitivity deviated significantly from those calculated when the core size distribution was neglected. These simulation results were compared with those from experiments for which reasonable agreement was obtained. These findings must be carefully considered when designing an optimal MNPT system.

Original languageEnglish
Article number010904
JournalJapanese journal of applied physics
Issue number1
Publication statusPublished - Jan 1 2020

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


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