Effect of magnetic nanoparticles on magnetic field homogeneity

被引：2

作者：

Guo, Si-Lin ^{[1
,2
]}

Yi, Wen-Tong ^{[3
]}

Li, Zhuang-Zhuang ^{[3
]}

机构：

[1] Natl Univ Def Technol, Lab Sci & Technol Integrated Logist Support, Changsha 410073, Peoples R China

[2] Natl Univ Def Technol, Coll Intelligence Sci & Technol, Changsha 410073, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Artificial Intelligence & Automat, Wuhan 430074, Peoples R China

来源：

CHINESE PHYSICS B | 2023年 / 32卷 / 05期

关键词：

magnetic nanoparticle; field distribution; Monte Carlo method; FERROMAGNETIC PARTICLES; OXIDE; NMR; WATER;

D O I：

10.1088/1674-1056/acaa26

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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.

引用

页数：5

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