Effect of core size distribution on magnetic nanoparticle harmonics for thermometry | Zendy

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

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Effect of core size distribution on magnetic nanoparticle harmonics for thermometry

Author(s) -

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

Publication year - 2019

Publication title -

japanese journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.487

H-Index - 129

eISSN - 1347-4065

pISSN - 0021-4922

DOI - 10.7567/1347-4065/ab5c9b

Subject(s) - harmonics , core (optical fiber) , excitation , amplitude , materials science , magnetic field , sensitivity (control systems) , relaxation (psychology) , distribution (mathematics) , thermometer , condensed matter physics , nuclear magnetic resonance , nanoparticle , field (mathematics) , computational physics , physics , thermodynamics , optics , nanotechnology , composite material , electronic engineering , mathematics , quantum mechanics , psychology , social psychology , mathematical analysis , voltage , pure mathematics , engineering

We investigated the effect of core size distribution on the performance of a magnetic nanoparticle thermometer (MNPT) in circumstances when Néel 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.

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