Single-pulse switching in ferrimagnets - TRR 227 paper in Phys. Rev. Lett.
U. Atxitia (project A08) and his PhD student F. Jakobs recently published a paper on universal criteria for single femtosecond pulse ultrafast magnetization switching in ferrimagnets in Physical Review Letters.
News from Jul 12, 2022
Though single-pulse switching has been experimentally demonstrated in some ferrimagnetic alloys, complete understanding of single-pulse switching has been missing due to the lack of an established theory accurately describing the transition to the nonequilibrium reversal path induced by femtosecond laser photoexcitation.
Unai Atxitia, PI of the 1st funding period of our TRR 227, and his coworker published their latest results in Phys. Rev. Lett., where they present a general macroscopic theory for the magnetization dynamics of ferrimagnetic materials upon femtosecond laser excitation. Furthermore, they provide explicit expressions for the magnetization relaxation rates in terms of microscopic parameters, which allows them to propose universal criteria for switching in ferrimagnets.
F. Jakobs and U. Atxitia: Universal criteria for single femtosecond pulse ultrafast magnetization switching in ferrimagnets - Phys. Rev. Lett. 129, 037203 (2022) - DOI: 10.1103/PhysRevLett.129.037203