First-Order Reversal Curve Analysis of Superparamagnetic Nanoparticles with Oriented Easy Axis of Magnetization

E. Sasaoka; C. Yang; S. B. Trisnanto; Z. Song; S. Ota; Y. Takemura

doi:10.3379/msjmag.2307R006

Biomagnetism / Medical Applications

First-Order Reversal Curve Analysis of Superparamagnetic Nanoparticles with Oriented Easy Axis of Magnetization

E. Sasaoka, C. Yang, S. B. Trisnanto, Z. Song, S. Ota, Y. Takemura

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Keywords: magnetic nanoparticles, first-order reversal curve (FORC), superparamagnetism, magnetic anisotropy, magnetization easy axis

JOURNAL OPEN ACCESS

2023 Volume 47 Issue 4 Pages 115-117

DOI https://doi.org/10.3379/msjmag.2307R006

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Abstract

We analyzed the magnetization process of magnetic nanoparticles using first-order reversal curve (FORC) analysis and verified a superparamagnetic feature and the orientation of the easy axis of the particles. The FORCs and FORC diagram of magnetic nanoparticles dispersed in water exhibited a superparamagnetic feature. The differences in the magnetizations and distributions of the coercive force of the solid-state samples were used to identify the orientation of the easy axes of magnetization.

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