2017/06/05 by A. H. M. Reid, Th. Rasing, R. V. Pisarev +2 · 1 citation
Physics and Astronomy · #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.4908186
published as AHM Reid, Th Rasing, RV Pisarev, HA Dürr, MC Hoffmann, Appl. Phys. Lett. 106, 082403 (2015); · 10 pages, 4 figures
arxiv created 2017/06/05 · arxiv updated 2017/06/07
Terahertz driven magnetization dynamics are explored in the orthoferrite DyFeO3. A high-field, single cycle THz pulse is used to excite magnon modes in the crystal together with other resonances. Both quasi-ferromagnetic and quasi-antiferromagnetic magnon modes are excited and appear in time-resolved measurements of the Faraday rotation. Other modes are also observed in the measurements of the time-resolved linear birefringence. Analysis of the excitation process reveals that despite larger than expected electro-optical susceptibility it is mainly the THz magnetic field that couples to the quasi-ferromagnetic and quasi-antiferromagnetic magnon branches.