Conditions for thermally induced all-optical switching in ferrimagnetic alloys: Modeling of TbCo

MORENO, Roberto, OSTLER, Thomas, CHANTRELL, Roy and CHUBYKALO-FESENKO, Oksana (2017). Conditions for thermally induced all-optical switching in ferrimagnetic alloys: Modeling of TbCo. Physical Review B (PRB), 96 (014409).

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Link to published version:: 10.1103/PhysRevB.96.014409

Abstract

We present atomistic spin dynamics modeling of thermally induced magnetization switching (TIMS) of disordered ferrimagnetic TbCo alloys varying the Tb concentration, laser pulse fluence, and its duration. Our results indicate that deterministic TIMS occurs in a wide range of Tb concentrations and at large laser fluences with a pulse duration of 50 fs. We furthermore demonstrate that the occurrence of the transient ferromagnetic-like state is necessary, but after first reversal, the system may switch back. The presence of a magnetization compensation point or going through it is shown not to be required.With the increase of the laser pulse duration TIMS becomes stochastic so that for a 1 ps laser pulse width and beyond the deterministic heat-assisted AOS does not exist.

Item Type: Article
Departments: Arts, Computing, Engineering and Sciences > Engineering and Mathematics
Identification Number: 10.1103/PhysRevB.96.014409
Depositing User: Thomas Ostler
Date Deposited: 13 Jul 2017 13:36
Last Modified: 13 Jul 2017 13:38
URI: http://shura.shu.ac.uk/id/eprint/16095

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