蒙特卡罗模拟人工自旋冰的退磁过程

虞丽菊; 孟祥雨; 李俊琴; 曹杰峰; 王勇; 敬超; 吴衍青; 邰仁忠

doi:10.11889/j.0253-3219.2016.hjs.39.060502

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蒙特卡罗模拟人工自旋冰的退磁过程

核物理、交叉学科研究 | 更新时间：2021-05-24

- 蒙特卡罗模拟人工自旋冰的退磁过程
- Monte Carlo simulation on demagnetization of artificial spin ice
- 核技术 2016年39卷第6期文章编号：060502
- 作者机构：
  
  1.上海大学物理系上海 200444
  2.中国科学院上海应用物理研究所张江园区上海 201204
- 作者简介：
  
  [ "虞丽菊,女,1989年出生,2013年毕业于广西大学,现为硕士研究生,研究领域为磁性纳米结构", "YU Liju, female, born in 1989, graduated from Guangxi University in 2013, master student, focusing on magnetic nanostructure" ]
  王勇,E-mail:wangyong@sinap.ac.cn WANG Yong, E-mail: wangyong@sinap.ac.cn
  吴衍青,E-mail:wuyanqing@sinap.ac.cn WU Yanqing, E-mail: wuyanqing@sinap.ac.cn
  邰仁忠,E-mail:tairenzhong@sinap.ac.cn TAI Renzhong, E-mail: tairenzhong@sinap.ac.cn
- 基金信息：
  
  国家自然科学基金(11225527);国家自然科学基金(11475251);国家自然科学基金(11275255);国家自然科学基金(5137111);上海市科委基础研究重点项目(13JC402400)
- DOI：10.11889/j.0253-3219.2016.hjs.39.060502
  中图分类号： TL65;O469
- 收稿日期：2016-01-25，
  
  修回日期：2016-04-12，
  
  纸质出版日期：2016-06
- 稿件说明：
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虞丽菊, 孟祥雨, 李俊琴, 等. 蒙特卡罗模拟人工自旋冰的退磁过程[J]. 核技术, 2016,39(6):060502

Liju YU, Xiangyu MENG, Junqin LI, et al. Monte Carlo simulation on demagnetization of artificial spin ice[J]. Nuclear techniques, 2016, 39(6): 060502
虞丽菊, 孟祥雨, 李俊琴, 等. 蒙特卡罗模拟人工自旋冰的退磁过程[J]. 核技术, 2016,39(6):060502 DOI： 10.11889/j.0253-3219.2016.hjs.39.060502.

Liju YU, Xiangyu MENG, Junqin LI, et al. Monte Carlo simulation on demagnetization of artificial spin ice[J]. Nuclear techniques, 2016, 39(6): 060502 DOI： 10.11889/j.0253-3219.2016.hjs.39.060502.

摘要

近年来

人工自旋冰(Artificial spin ice

ASI)因具有潜在的应用价值以及理论研究价值而倍受关注

成为磁学领域的研究热点之一。以往的研究集中在Square和Kagome两种晶格结构

由于能量势垒和阻挫的大量存在

实验上难以通过退磁等方法达到其内部相互作用决定的能量基态。本文基于Kagome晶格结构提出了一种新的人工自旋冰结构

并基于蒙特卡罗模拟了三种不同的退磁方法对体系能量的影响。结果表明

退磁过程中旋转磁场方向可更有效地降低体系能量

并诱导多种磁结构的出现。

Abstract

Background

Recently

the artificial spin ice (ASI) draws a wide attention for its exotic phenomenon and potential applications. Previous works mainly studied the Square and Kagome lattice systems

and extensive researches concentrated upon how to achieve the ground state. It turned out to be experimentally difficult to get the absolute ground state of Kagome ASI because of the high frustration.

Purpose

Here we propose a new structure based on Kagome lattice

which is just locally frustrated. In order to get good approximation of its ground state

we employed a Monte Carlo simulation on demagnetization process with three methods.

Methods

The Monte Carlo simulation was carried on a system including 21×21 cells

and an extra field had been employed to drive the spins overturning.

Results & Conclusion

It turned out that the rotating magnetic field was more effective to get to the ground state

and induced the emergence of various magnetic structures.

关键词

Keywords

references

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