小缺陷铁纳米环的磁特性

计算物理 ›› 2020, Vol. 37 ›› Issue (4): 473-478.

小缺陷铁纳米环的磁特性

邓楚楚¹, 张鑫源¹, 陈水源^1,2, 吴宇晗¹, 叶晴莹^1,2, 黄志高^1,2

1. 福建师范大学物理与能源学院福建省量子调控与新能源材料重点实验室, 福建福州 350117;
2. 福建省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:2019-08-21 修回日期:2019-11-14 出版日期:2020-07-25 发布日期:2020-07-25
通讯作者: 叶晴莹(1980-),女,副教授,研究方向为凝聚态物理和物理教学,E-mail:qyye@fjnu.edu.cn
作者简介:邓楚楚(1997-),女,硕士生,研究方向为凝聚态物理和物理教学,E-mail:1030141820@qq.com
基金资助:
国家自然科学基金（61574037）、福建省自然科学基金（2017J01553）、福建省本科高校教育教学改革研究（FBJG20180259）、福建师范大学本科教学改革研究（I201803032）及大学生创新创业训练计划（201910394013，cxxl-2019127，cxxl-2019s62）资助项目

Magnetic Properties of Fe Nanorings with Small Defects

DENG Chuchu¹, ZHANG Xinyuan¹, CHEN Shuiyuan^1,2, WU Yuhan¹, YE Qingying^1,2, HUANG Zhigao^1,2

1. College of Physics and Energy, Fujian Normal University, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou, Fujian 350117, China;
2. Fujian Provincial Collaborative Innovation Central for Optoelectronic Semiconductors and Efficient Devices, Xiamen, Fujian 361005, China

Received:2019-08-21 Revised:2019-11-14 Online:2020-07-25 Published:2020-07-25

摘要/Abstract

摘要： 用蒙特卡罗方法与快速傅里叶变换微磁学相结合的方法模拟小缺陷铁纳米环的磁化动力学.研究发现小缺陷铁纳米环的磁滞回线出现"双稳态"特征，与实验结果一致.能量研究表明：涡旋态出现的区间为能量局域极小区间.缺陷系统的剩磁随着缺陷位置的变化而变化：剩磁随着Y值的增加先增大后减小，并在中间区域保持相对稳定.系统的自旋组态可以解释上述现象.

关键词: 小缺陷铁纳米环, 蒙特卡罗方法, 快速傅里叶变换微磁学方法, 磁特性

Abstract: Magnetic dynamic properties of Fe nanorings with small defects were simulated with Monte Carlo method. It is found that hysteresis loops of small defect Fe nanoring have "bistable" characteristics, which is consistent with experimental results. Energy research shows that vortex states appear in the region of local energy minimum. Remanence of defect system changes with defect location: The remanence increases first and then decreases with the increase of Y, and remains relatively stable in the middle region. Spin configuration of the system explains the above phenomenon well.

Key words: Fe nanoring with small defect, Monte Carlo method, fast Fourier transform micromagnetism method, magnetic properties

中图分类号:

O482.1

邓楚楚, 张鑫源, 陈水源, 吴宇晗, 叶晴莹, 黄志高. 小缺陷铁纳米环的磁特性[J]. 计算物理, 2020, 37(4): 473-478.

DENG Chuchu, ZHANG Xinyuan, CHEN Shuiyuan, WU Yuhan, YE Qingying, HUANG Zhigao. Magnetic Properties of Fe Nanorings with Small Defects[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2020, 37(4): 473-478.

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