AC magnetic susceptibility of magnetic nanoparticles measured under DC bias magnetic field

被引：0
|
作者：
Noguchi, Shoya [1 ]
Trisnanto, Suko Bagus [1 ]
Yamada, Tsutomu [1 ]
Ota, Satoshi [2 ]
Takemura, Yasushi [1 ]
机构：
[1] Division of Electrical and Computer Engineering, Yokohama National University, Yokohama,240-8501, Japan
[2] Department of Electrical and Electronic Engineering, Shizuoka University, Hamamatsu,432-8561, Japan
来源：
Journal of the Magnetics Society of Japan | 2022年 / 46卷 / 02期
关键词：
AC Magnetic susceptibility - Bias magnetic field - Brownian relaxations - Core diameters - DC bias - Frequencies dependence - Magnetic particle imaging - Magnetization dynamics - Magnetization relaxation - Superparamagnetic nanoparticles;
D O I：
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中图分类号：
学科分类号：
摘要：
The magnetization dynamics of magnetic nanoparticles are essential for the medical applications of hyperthermia and magnetic particle imaging. In this paper, we clarified the AC magnetic susceptibility of superparamagnetic nanoparticles and their frequency dependence. We measured the AC magnetic susceptibility under an applied DC bias magnetic field. The frequency dependence of AC magnetic susceptibility was clearly observed. The experimentally obtained characteristics of the samples with different effective core diameters and dependence on the intensity of the DC bias magnetic field agreed with the theory assuming a simple particle model. The sample comprising effective core diameters with a wide distribution exhibited different characteristics than the samples comprising magnetically fractionated nanoparticles with a narrower core diameter distribution. © 2022, Magnetics Society of Japan. All rights reserved.
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页码：42 / 48
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