物理学报2011，Vol.60Issue(10)：635-641,7.
反铁磁耦合硬磁-软磁-硬磁三层膜体系的不可逆交换弹性反磁化过程
Irreversible exchange-spring processes of antiferromagnetically exchange coupled hard-soft-hard trilayer structures
摘要
Abstract
The demagnetization processes of antiferromagnetically exchange-coupled hard-soft-hard trilayer structures are studied based on the one-dimensional atomic chain model.It is found that when the magnetic anisotropy of soft layer is taken into account,the change of the soft layer thickness or the interfacial exchange coupling strength may lead to a transition from the reversible exchange-spring process to the irreversible process.For the trilayer structures with very thin soft layer,the demagnetization process exhibits typical reversible magnetic exchange-spring behavior.However as the thickness of soft layer increases,there appears a crossover point tc,after which the process becomes irreversible.There occurs also a critical interfacial exchange constant Acsh,above which the exchange-spring process is reversible.When AshAcsh,the irreversible exchange-spring process is realized.The phase diagrams of reversible and irreversible exchange-spring process are mapped in the plane of the interfacial exchange coupling Ash and soft layer thickness Ns.The dependences of the bending field on the soft layer thickness for different interfacial exchange couplings are numerically examined.关键词
反铁磁耦合三层膜/交换弹性反磁化过程/反磁化机理/磁相图Key words
antiferromagnetically exchange coupled trilayer/exchange-spring process/demagnetization mechanism/magnetic phase diagram分类
数理科学引用本文复制引用
郭光华,张光富,王希光..反铁磁耦合硬磁-软磁-硬磁三层膜体系的不可逆交换弹性反磁化过程[J].物理学报,2011,60(10):635-641,7.基金项目
国家自然科学基金 （）
湖南省自然科学基金（批准号：07JJ3103）资助的课题 （）
