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椭圆钴纳米环磁化动力学研究
  • ISSN号：1007-7405
  • 期刊名称：集美大学学报(自然科学版)
  • 时间：2012
  • 页码：389-393
  • 分类：O482.5[理学—固体物理;理学—物理]
  • 作者机构：[1]福建师范大学物理与能源学院,福建福州350108
  • 相关基金：国家自然科学基金资助项目（11004039,11004031）; 福建省自然科学基金资助项目（2010J01277,2012J01003）; 福建省教育厅基金资助项目（JA10086,JB11024）; 福建省大学生创新实验计划项目（Fjnu2011-004,BKL2011-010,cxxl-078）
  • 相关项目：磁性镍基合金/高介电栅界面微结构和自旋组态对功函数的调制
作者： 叶晴莹|李铭领|吴洋洋|杨莉|朱伟波|陈水源|黄志高|
关键词： 椭圆钴纳米环, 偏心率, 厚度, 磁滞回线, 自旋组态, ellipse Co nanorings, eccentricity, thickness, hysteresis loop, spin configuration
中文摘要：

利用Monte-Carlo方法模拟了不同偏心率、不同厚度的椭圆钴纳米环的磁特性.模拟结果表明：当系统的偏心率较小时,厚度越大的椭圆钴纳米环的涡旋态（＂vortex＂态）越稳定,此系统的磁滞回线保持圆形纳米环的主要特征;系统的偏心率较大时,系统的磁特性与圆形纳米环有较大差别,涡旋态的稳定性与厚度并无明显关联;对椭圆钴纳米环的自旋组态分析发现,椭圆系统在极化态（＂onion＂态）与涡旋态之间出现了更多的亚稳态.

英文摘要：

Based on the Monte-Carlo simulation,the effects of different thickness and eccentricity for ellipse Co nanorings were studied.It was found that the stability of vortex-type states increases with increasing the thickness of ellipse Co nanorings when eccentricity was less.Moreover,the magnetic hysteresis loops of this system were similar to those of circular Co nanorings.However,there exists obvious difference between magnetic hysteresis loops of ellipse Co nanorings and those of circular Co nanorings when the eccentricity increased.The stability of vortex-type state was not significantly associated with the thickness.From the spin configurations,it was observed that there were more metastable states in the system of ellipse Co nanorings than those of circular Co nanorings.

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期刊信息
  • 《集美大学学报：自然科学版》
  • 主管单位:集美大学
  • 主办单位:集美大学
  • 主编：曹敏杰
  • 地址：福建厦门集美区银江路185号
  • 邮编：361021
  • 邮箱：xuebao@jmu.edu.cn
  • 电话：0592-6181045
  • 国际标准刊号：ISSN：1007-7405
  • 国内统一刊号：ISSN：35-1186/N
  • 邮发代号:
  • 获奖情况:
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  • 被引量:3663