链状磁性纳米颗粒磁化特性的数值研究

IF 1.1 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Magnetics Letters Pub Date : 2022-12-23 DOI:10.1109/LMAG.2022.3231819

Haochen Zhang;Yi Sun;Zhongzhou Du;Teruyoshi Sasayama;Takashi Yoshida

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引用次数: 0

摘要

这项工作研究了链状磁性纳米颗粒（CMNP），这是一种具有偶极-偶极相互作用的磁性纳米颗粒，其中单个纳米颗粒连接形成链状结构。我们使用Landau–Lifshitz–Gilbert方程对CMNP和单核MNP（SMNP）的交流磁化特性进行了数值分析。由于磁偶极-偶极相互作用，在一定的激发场下，CMNP的磁化强度大约是SMNP的10倍。因此，具有链状结构的MNP有望在医学应用中具有增强的磁化特性和更好的性能。此外，研究发现，连接10个或更多尺寸约为10–12 nm的磁芯的CMNP可以预期更强的磁化强度。

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Numerical Study on the Magnetization Characteristics of Chainlike Magnetic Nanoparticles

This work investigated chainlike magnetic nanoparticles (CMNPs), which are a type of magnetic nanoparticle (MNP) with a dipole–dipole interaction in which individual nanoparticles are connected to form a chainlike structure. We numerically analyzed the ac magnetization characteristics of the CMNP and the single-core MNP (SMNP) using the Landau–Lifshitz–Gilbert equation. Owing to the magnetic dipole–dipole interaction, the magnetization of the CMNP is approximately 10 times that of the SMNP under a certain excitation field. MNPs with a chainlike structure are thus expected to have enhanced magnetization characteristics and better performance in medical applications. Additionally, it was found that stronger magnetization can be expected from a CMNP connecting 10 or more magnetic cores with a size of approximately 10–12 nm.

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来源期刊

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.