钴纳米环层叠阵列的厚度对磁特性的影响  

Effect of Thickness of Stacked Co Nanoring Arrays on Magnetic Properties

作　　者：黄倩南 何雨洁 范春龙 温昌林 薛宇宸 陈水源 黄志高 叶晴莹 HUANG Qiannan;HE Yujie;FAN Chunlong;WEN Changlin;XUE Yuchen;CHEN Shuiyuan;HUANG Zhigao;YE Qingying(College of Physics and Energy,Fujian Normal University,Fuzhou,Fujian 350117,China;Fujian Provincial Collaborative Innovation Central for Optoelectronic Semiconductors and Efficient Devices,Xiamen,Fujian 361005,China)

机构地区：[1]福建师范大学物理与能源学院,福建福州350117 [2]福建半导体光电材料及其高效转换器件协同创新中心,福建厦门361005

出　　处：《计算物理》2024年第2期232-238,共7页Chinese Journal of Computational Physics

基　　金：福建省自然科学基金(2021J01191,2020J01192);福建师范大学大学生创新创业训练计划项目(cxxl-2022173,cxxl-2023225)资助。

摘　　要：基于蒙特卡罗(MC)方法与快速傅里叶变换微磁学(FFTM)方法,模拟不同厚度层叠阵列钴纳米环的磁化动力学特征。研究发现:厚度不同的钴纳米环的磁滞回线均出现“双稳态”特征,且系统的“涡旋态”的形成及稳定性与厚度明显相关。进一步研究表明:纳米环层叠阵列的厚度对系统达到饱和所需要的外磁场有较大的影响,磁滞回线的台阶宽度ΔH_(fc)也与厚度相关,模拟结果与实验事实接近。Based on the Monte Carlo(MC)method and the fast Fourier transform micromagnetism(FFTM)method,the magnetic dynamic properties of the stacked Co nanoring arrays with different thickness are simulated.It is found that the hysteresis loops of Co nanorings with different thickness have the bistable states,and the formation and stability of the"vortex state"are significantly related to the thickness.Further studies show that the thickness of the stacked Co nanoring arrays has a great influence on the external magnetic field required for the system to reach saturation.The step width of the hysteresis loopΔH_(fc)is also related to the thickness.The simulation results are close to the experimental facts.

关 键 词：蒙特卡罗方法 快速傅里叶变换微磁学方法 纳米环层叠阵列 厚度 磁特性 

分 类 号：O482.1[理学—固体物理]