THz-Scale Field-Induced Spin Dynamics in Ferrimagnetic Iron Garnets.

Autor: Blank TGH; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands., Grishunin KA; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.; MIREA-Russian Technological University, 119454 Moscow, Russia., Mashkovich EA; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.; University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia., Logunov MV; Kotel'nikov Institute of Radioengineering and Electronics, 125009 Moscow, Russia., Zvezdin AK; Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia.; P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia., Kimel AV; Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2021 Jul 16; Vol. 127 (3), pp. 037203.
DOI: 10.1103/PhysRevLett.127.037203
Abstrakt: THz magnetization dynamics of antiferromagnetically coupled spins in ferrimagnetic Tm_{3}Fe_{5}O_{12} is excited by a picosecond single-cycle pulse of a magnetic field and probed with the help of the magneto-optical Faraday effect. Data analysis combined with numerical modeling shows that the dynamics corresponds to the exchange mode excited by the Zeeman interaction of the THz magnetic field with the spins. We argue that THz-pump-IR-probe experiments on ferrimagnets offer a unique tool for quantitative studies of dynamics and mechanisms to control antiferromagnetically coupled spins.
Databáze: MEDLINE