Heat—Activated Effect of Exchange Coupling Between Two Ferromagnets Separated by an Amorphous Semiconducting Barrier

作     者：肖明文 李正中 等 

作者机构：DepartmentofPhysicsNanjingUniversityNanjing210093 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2002年第19卷第11期

页      面：1691-1694页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：国家973计划 

主　　题：Ferromagnetism 

摘      要：We try to extend our previous zero-temperature tunnelling theory for the exchange coupling between two ferromagnets separated by an amorphous semiconducting barrier to the case of finite temperature. The result exhibits that the tunnelling electrons can absorb or emit phonons when they tunnel through the amorphous barrier at finite temperatures so that the interlayer exchange coupling is heat activated. This agrees with the experiments.