钴纳米环层叠阵列的厚度对磁特性的影响

doi:10.19596/j.cnki.1001-246x.8698

计算物理 ›› 2024, Vol. 41 ›› Issue (2): 232-238.DOI: 10.19596/j.cnki.1001-246x.8698

钴纳米环层叠阵列的厚度对磁特性的影响

黄倩南¹(), 何雨洁¹, 范春龙¹, 温昌林¹, 薛宇宸¹, 陈水源¹^,², 黄志高¹^,², 叶晴莹¹^,²^,*()

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

收稿日期:2023-02-07 出版日期:2024-03-25 发布日期:2024-04-03
通讯作者: 叶晴莹
作者简介:黄倩南(2002-)，女，E-mail：1752615631@qq.com
基金资助:
福建省自然科学基金(2021J01191);福建省自然科学基金(2020J01192);福建师范大学大学生创新创业训练计划项目(cxxl-2022173);福建师范大学大学生创新创业训练计划项目(cxxl-2023225)

Effect of Thickness of Stacked Co Nanoring Arrays on Magnetic Properties

Qiannan HUANG¹(), Yujie HE¹, Chunlong FAN¹, Changlin WEN¹, Yuchen XUE¹, Shuiyuan CHEN¹^,², Zhigao HUANG¹^,², Qingying YE¹^,²^,*()

1. College of Physics and Energy, Fujian Normal University, Fuzhou, Fujian 350117, China
2. Fujian Provincial Collaborative Innovation Central for Optoelectronic Semiconductors and Efficient Devices, Xiamen, Fujian 361005, China

Received:2023-02-07 Online:2024-03-25 Published:2024-04-03
Contact: Qingying YE

摘要/Abstract

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。

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

Abstract:

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 loop ΔH_fc is also related to the thickness. The simulation results are close to the experimental facts.

Key words: Monte Carlo method, fast Fourier transform micromagnetism method, the stacked Co nanoring arrays, thickness, magnetic properties

中图分类号:

O482.1

黄倩南, 何雨洁, 范春龙, 温昌林, 薛宇宸, 陈水源, 黄志高, 叶晴莹. 钴纳米环层叠阵列的厚度对磁特性的影响[J]. 计算物理, 2024, 41(2): 232-238.

Qiannan HUANG, Yujie HE, Chunlong FAN, Changlin WEN, Yuchen XUE, Shuiyuan CHEN, Zhigao HUANG, Qingying YE. Effect of Thickness of Stacked Co Nanoring Arrays on Magnetic Properties[J]. Chinese Journal of Computational Physics, 2024, 41(2): 232-238.

图/表 8

图1 钴纳米环层叠阵列模型

Fig.1 The model of the stacked Co nanoring arrays

图2 r=40 nm时，不同厚度的纳米环层叠阵列的磁滞回线

Fig.2 The hysteresis loops of the stacked Co nanoring arrays with different thickness at r=40 nm

图3 不同外场作用下纳米环的自旋组态(r=40 nm、Z=10 nm)

Fig.3 The evolution of spin-configurations for Co nanorings at r=40 nm, Z=10 nm

图4 不同外场作用下纳米环的自旋组态(r=40 nm、Z=30 nm)

Fig.4 The evolution of spin-configurations for Co nanorings at r=40 nm, Z=30 nm

图5 r=80 nm时，不同厚度的纳米环层叠阵列的磁滞回线

Fig.5 The hysteresis loops of the stacked Co nanoring arrays with different thickness at r=80 nm

图6 M1/MS随Z值变化关系曲线

Fig.6 The curves of M1/MS versus Z

图7 ΔHfc随Z值的变化关系曲线

Fig.7 The curve of ΔHfc versus Z

图8 Z值与ΔHfc/V的关系曲线

Fig.8 The curve of ΔHfc/V versus Z

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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

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