铁磁性
磁化
皮秒
磁化动力学
材料科学
超短脉冲
凝聚态物理
激光器
磁矩
磁场
飞秒
磁存储器
光学
物理
量子力学
作者
Richard F. L. Evans,Thomas Ostler,R.W. Chantrell,Ilie Radu,Th. Rasing
摘要
Synthetic ferrimagnets are composite magnetic structures formed from two or more anti-ferromagnetically coupled magnetic sublattices with different magnetic moments. Here, we report on atomistic spin simulations of the laser-induced magnetization dynamics on such synthetic ferrimagnets and demonstrate that the application of ultrashort laser pulses leads to sub-picosecond magnetization dynamics and all-optical switching in a similar manner as in ferrimagnetic alloys. Moreover, we present the essential material properties for successful laser-induced switching, demonstrating the feasibility of using a synthetic ferrimagnet as a high density magnetic storage element without the need of a write field.
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