自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第43卷    第2期    总第210期    2012年2月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2012)02-0472-05
Co-A1-O磁性纳米颗粒膜微波磁性研究
舒畅1,邓联文1, 2,杨兵初1,熊健1,左舜贵1,梁丽杰1

(1. 中南大学 物理科学与技术学院,湖南 长沙,410083;
2.中南大学 粉末冶金国家重点实验室,湖南 长沙,410083
)

摘 要: 通过实验研究和理论计算模拟研究Co-A1-O磁性纳米颗粒膜的微波磁性。首先采用双靶反应磁控溅射工艺制备Co-A1-O磁性纳米颗粒膜,探讨工艺条件对薄膜微波磁谱的影响;然后,利用Landau-Lifshitz-Gilbert方程和Bruggeman有效媒质理论,计算模拟主要磁参量变化对磁性纳米颗粒膜磁谱的影响。研究结果表明:增大Co靶溅射功率,可使磁性颗粒间因分布电容效应引起的涡流损耗增加,从而使磁谱的共振线宽增大;阻尼系数增大导致磁导率频谱的共振线宽增大趋势与实验结果基本一致。

 

关键字: Co-A1-O颗粒膜;磁导率;LLG方程;有效媒质理论

Microwave magnetism of Co-A1-O nano-granular film
SHU Chang1, DENG Lian-wen1, 2, YANG Bing-chu1, XIONG Jian1, ZUO Shun-gui1, LIANG Li-jie1

1. School of Physics Science and Technology, Central South University, Changsha 410083, China;
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract:To research magnetic characteristics of nano-granular film such as Co-Al-O in the microwave range, related research was studied experimentally and theoretically. Co-Al-O nano-granular films with high microwave permeability were synthesized by magnetron sputtering technology and effect of the major parameters on preparation was discussed. Analytic calculation of effective permeability frequency spectra of the nano-granular thin film was presented based on the Landau-Lifshitz-Gilbert equation and Bruggeman effective medium theory. The results show that the eddy current losses caused by capacitive effect between the particles increase with the increase of the Co sputtering power, and the resonance linewidth broadens. Increased damping parameter will broaden the absorption bandwidth. The simulation results agrees well with the experimental ones.

 

Key words: Co-A1-O nano-granular film; permeability; LLG equation; effective medium theory

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号