线性磁小体链的铁磁共振谱。

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Beilstein Journal of Nanotechnology Pub Date : 2024-02-05 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.15
Elizaveta M Gubanova, Nikolai A Usov
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引用次数: 0

摘要

通过求解随机兰道-利夫希茨方程,计算了线性磁小体链的定向和非定向集合体的铁磁共振(FMR)频谱。研究了稀释磁小体链集合体的 FMR 光谱形状与粒子直径、链中粒子数量、相邻粒子中心间距、粒子各向异性立方轴的相互取向以及磁阻尼常数值的关系。结果表明,无取向链集合体的调频反射光谱取决于脂质磁体膜固定厚度下的粒子平均直径以及磁阻尼常数的值。同时,在 Np ≥ 10 的条件下,它们实际上与链中的粒子数 Np 无关。无取向磁小体链集合体的调频波谱与相互作用的球形磁铁矿纳米粒子随机簇的调频波谱进行了比较。结果表明,即使随机簇的填充密度值足够大,两种集合体的调频反射光谱形状也有明显差异。
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Ferromagnetic resonance spectra of linear magnetosome chains.

The ferromagnetic resonance (FMR) spectra of oriented and non-oriented assemblies of linear magnetosome chains are calculated by solving the stochastic Landau-Lifshitz equation. The dependence of the shape of the FMR spectrum of a dilute assembly of chains on the particle diameter, the number of particles in a chain, the distance between the centers of neighboring particles, the mutual orientation of the cubic axes of particle anisotropy, and the value of the magnetic damping constant is studied. It is shown that FMR spectra of non-oriented chain assemblies depend on the average particle diameter at a fixed thickness of the lipid magnetosome membrane, as well as on the value of the magnetic damping constant. At the same time, they are practically independent of the number Np of particles in the chain under the condition Np ≥ 10. The FMR spectra of non-oriented assemblies of magnetosome chains are compared with that of random clusters of interacting spherical magnetite nanoparticles. The shape of FMR spectra of both assemblies is shown to differ appreciably even at sufficiently large values of filling density of random clusters.

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来源期刊
Beilstein Journal of Nanotechnology
Beilstein Journal of Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.70
自引率
3.20%
发文量
109
审稿时长
2 months
期刊介绍: The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology. The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.
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