The induced magnetization in the GMR sandwich structure

• Main Authors: Siow-Fang Chen, 陳小芳
• Other Authors: Chung-Yu Mou
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/36695395968282971696

碩士 === 國立清華大學 === 物理學系 === 91 === We investigate the induced magnetization of the spacer layer in the magnetic quantum well of the GMR structure. Only parallel arrangements of the magnetization are considered. By assuming a non-vanishing exchange coupling constant in the spacer layer, we derive a self-consistent equation for the average induced magnetization. Based on the self-consistent equation, the induced magnetization is computed numerically, which then determines the coupling energies. The magnetization is found to oscillate with the width of the spacer layer. Furthermore, it shows distinct jumps with characteristic periods. At large d, the magnetization decays to zero rapidly, allowing one to define an effective decay length. Systematic studies of the dependence of decay length on the relevant parameters are performed.