Effect of magnetic nanoparticles on magnetic field homogeneity

doi:10.1088/1674-1056/acaa26

中国物理B ›› 2023, Vol. 32 ›› Issue (5): 50203-050203.doi: 10.1088/1674-1056/acaa26

Effect of magnetic nanoparticles on magnetic field homogeneity

Si-Lin Guo(郭斯琳)^1,2,†, Wen-Tong Yi(易文通)³, and Zhuang-Zhuang Li(李壮壮)³

1 Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha 410073, China;
2 College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China;
3 School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan 430074, China

收稿日期:2022-07-27 修回日期:2022-12-04 接受日期:2022-12-09 出版日期:2023-04-21 发布日期:2023-04-26
通讯作者: Si-Lin Guo E-mail:silin7069@qq.com

Effect of magnetic nanoparticles on magnetic field homogeneity

Si-Lin Guo(郭斯琳)^1,2,†, Wen-Tong Yi(易文通)³, and Zhuang-Zhuang Li(李壮壮)³

1 Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha 410073, China;
2 College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China;
3 School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan 430074, China

Received:2022-07-27 Revised:2022-12-04 Accepted:2022-12-09 Online:2023-04-21 Published:2023-04-26
Contact: Si-Lin Guo E-mail:silin7069@qq.com

摘要/Abstract

摘要： The mechanism of magnetic nanoparticles (MNPs) affecting magnetic field uniformity is studied in this work. The spatial distribution of MNPs in liquid is simulated based on Monte Carlo method. The induced field of the single MNP is combined with the magnetic field distribution of magnetofluid. In the simulation, magnetic field uniformity is described by a statistical distribution. As the chemical shift (CS) and full width at half maximum (FWHM) of magnetic resonance (MR) spectrum can reflect the uniformity of magnetic field, the simulation is verified by spectrum experiment. Simulation and measurement results prove that the CS and FWHM of the MR spectrum are basically positively correlated with the concentration of MNPs and negatively correlated with the temperature. The research results can explain how MNPs play a role in MR by affecting the uniform magnetic field, which is of great significance in improving the temperature measurement accuracy of magnetic nanothermometers and the spatial resolution of magnetic particle imaging.

关键词: magnetic nanoparticle, field distribution, Monte Carlo method

Abstract: The mechanism of magnetic nanoparticles (MNPs) affecting magnetic field uniformity is studied in this work. The spatial distribution of MNPs in liquid is simulated based on Monte Carlo method. The induced field of the single MNP is combined with the magnetic field distribution of magnetofluid. In the simulation, magnetic field uniformity is described by a statistical distribution. As the chemical shift (CS) and full width at half maximum (FWHM) of magnetic resonance (MR) spectrum can reflect the uniformity of magnetic field, the simulation is verified by spectrum experiment. Simulation and measurement results prove that the CS and FWHM of the MR spectrum are basically positively correlated with the concentration of MNPs and negatively correlated with the temperature. The research results can explain how MNPs play a role in MR by affecting the uniform magnetic field, which is of great significance in improving the temperature measurement accuracy of magnetic nanothermometers and the spatial resolution of magnetic particle imaging.

Key words: magnetic nanoparticle, field distribution, Monte Carlo method

中图分类号: (Applications of Monte Carlo methods)

02.70.Uu

07.55.Db (Generation of magnetic fields; magnets)

Si-Lin Guo(郭斯琳), Wen-Tong Yi(易文通), and Zhuang-Zhuang Li(李壮壮). Effect of magnetic nanoparticles on magnetic field homogeneity[J]. 中国物理B, 2023, 32(5): 50203-050203.

Si-Lin Guo(郭斯琳), Wen-Tong Yi(易文通), and Zhuang-Zhuang Li(李壮壮). Effect of magnetic nanoparticles on magnetic field homogeneity[J]. Chin. Phys. B, 2023, 32(5): 50203-050203.

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Effect of magnetic nanoparticles on magnetic field homogeneity

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