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

Moreno, R.; Ostler, T. A.; Chantrell, R. W.; Chubykalo-Fesenko, O.

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 ferromagneticlike 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.

Citation

Moreno, R., Ostler, T. A., Chantrell, R. W., & Chubykalo-Fesenko, O. (2017). Conditions for thermally induced all-optical switching in ferrimagnetic alloys: Modeling of TbCo. Physical Review B, 96(1), Article 014409. https://doi.org/10.1103/PhysRevB.96.014409

• Journal Article Type: Article
• Acceptance Date: May 18, 2017
• Online Publication Date: Jul 6, 2017
• Publication Date: Jul 6, 2017
• Deposit Date: Jun 16, 2022
• Journal: Physical Review B
• Print ISSN: 2469-9950
• Electronic ISSN: 2469-9969
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 96
• Issue: 1
• Article Number: 014409
• DOI: https://doi.org/10.1103/PhysRevB.96.014409
• Public URL: https://hull-repository.worktribe.com/output/4014967