Evans, R.; Ostler, T.; Chantrell, R.; Radu, I.; Rasing, T.: Ultrafast thermally induced magnetic switching in synthetic ferrimagnets. Applied Physics Letters 104 (2014), p. 082410/1-4
10.1063/1.4867015
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Abstract:
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.