反铁磁交换作用对纳米线动力学行为的影响

doi:10.3969/j.issn.2095-2198.2023.03.012

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当核壳结构磁性纳米线用作高密度磁存储单元时，系统的共振频率会限制其磁存储速率的上限值.为了探究反铁磁界面交换作用对核壳结构磁性纳米线磁共振行为的影响，通过微磁学模拟方法对系统的动力学行为进行研究.研究了具有反铁磁界面交换作用的系统和纯铁磁系统.首先，讨论界面交换作用对系统磁共振行为的影响，发现具有反铁磁界面交换作用的系统的磁共振频率会略高于铁磁系统.然后，讨论外加直流场对系统共振频率和共振线宽的影响，发现具有反铁磁界面交换作用的系统的共振线宽和外加直流场的强度呈非线性关系.最后，讨论温度对系统磁共振行为的影响，发现纯铁磁系统的热稳定性要强于具有反铁磁界面交换作用的系统.

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关键词: 核壳结构纳米线')" href="#">

核壳结构纳米线微磁学模拟动力学行为共振频率

Abstract:

When core-shell magnetic nanowires are used as high-density magnetic storage units,the upper limit of magnetic storage rate is limited by the resonant frequency of the system.In order to investigate the effect of antiferromagnetic interfacial exchange interaction on the resonance behavior of core-shell magnetic nanowires,the dynamic behavior of the system was studied by means of micromagnetic simulation.In this study,two systems were considered,namely the system with ferromagnetic interfacial exchange interaction and the system with antiferromagnetic interfacial exchange interaction.Firstly,the effect of interfacial exchange interactionon the magnetic resonance behavior of the system was discussed.It was found that the magnetic resonance frequency of the system with antiferromagnetic interfacial exchange interactionwas slightly higher than that of the ferromagnetic system.Then the influence of the external DC magneticfield on the resonance frequency and resonance linewidth of the system was discussed.It was found that the resonance linewidth of the system with antiferromagnetic interfacialexchangeinteractionwas nonlinear to the intensity of the external DC magneticfield.Finally,the influence of temperature on the magnetic resonance behavior of the systems was discussed.It was found that the thermal stability of ferromagnetic system was stronger than that of the system with antiferromagnetic interfacial exchange interaction.

Key words: core-shell ')" href="#">

core-shell nanowires；micromagnetic simulation；dynamic behavior；resonancefrequency

出版日期: 2023-06-30 发布日期: 2024-03-11 整期出版日期: 2023-06-30

ZTFLH:

O482.53⁺4

基金资助:

辽宁省教育厅青年育苗项目(LQ2020014)

作者简介: 鲜于正楠（1990—），男(朝鲜族)，辽宁沈阳人，讲师，博士，主要从事磁性材料的理论研究.

引用本文:

鲜于正楠1, 杜安2.

反铁磁交换作用对纳米线动力学行为的影响 [J]. 沈阳化工大学学报, 2023, 37(3): 283-287.
XIANYU Zhengnan1, DU An2.

Effect of Antiferromagnetic Exchange Interaction on the Dynamic Behavior of Nanowires Magnetic Nanowires . Journal of Shenyang University of Chemical Technology, 2023, 37(3): 283-287.

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https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2023.03.012 或 https://xuebao.syuct.edu.cn/CN/Y2023/V37/I3/283

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