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.
Ultrafast thermally induced magnetic switching in synthetic ferrimagnets
Richard F. L. Evans, Thomas A. Ostler, Roy W. Chantrell, Ilie Radu, Theo Rasing; Ultrafast thermally induced magnetic switching in synthetic ferrimagnets. Appl. Phys. Lett. 24 February 2014; 104 (8): 082410. https://doi.org/10.1063/1.4867015
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