交换弹性双层膜的退磁过程与自旋波特性研究  

Study on Demagnetization Process and Characteristics of Spin Wave of Exchange Elastic Bilayer Membrane

作　　者：张光富[1] 田野[1] 邓杨保[1] 

机构地区：[1]湖南城市学院,湖南益阳413000

出　　处：《湖南城市学院学报（自然科学版）》2015年第2期49-52,共4页Journal of Hunan City University:Natural Science

基　　金：湖南省自然科学基金青年项目(14JJ6043);益阳市科技计划项目(2014JZ54)

摘　　要：基于一维原子链模型,理论和数值计算研究了软磁/硬磁双层膜交换弹性磁体系的退磁过程和本征自旋波性质。研究表明:薄软磁层诱发可逆的交换弹性退磁过程,随着软磁层厚度增大,不可逆交换弹性退磁过程被激发。获得了双层膜的软磁层本征自旋波模式空间分布、色散关系曲线,退磁过程自旋波模式频率随外磁场的变化规律。研究显示退磁过程中软磁层微磁结构变化与自旋波模式软化密切相关。Based on the one-dimensional atomic chain model theory and data calculating, this paper analyzes the de- magnetization process and the characteristics of spin wave of exchange elastic bilayer membrane. The study shows that the thin and soft magnetosphere triggers reversible exchange elastic demagnetization process and the irreversible demag- netization process is stimulated with the increase of the thickness of the soft magnetosphere. The Study shows that there is a close connection between the structure change of the soft magnetosphere during demagnetization process and the model softening of the spin wave.

关 键 词：自旋波 退磁过程 色散关系 

分 类 号：O482.5[理学—固体物理]