Coherent Magnetization Dynamics in Ni₈₀Fe₂₀ Thin Films Incorporated in Fe/Au Spintronic Terahertz Emitters

All-optical nonlinear chiral ultrafast magnetization dynamics driven by circularly polarized magnetic fields

“…An appealing alternative to induce coherent magnetization dynamics consists of the use of magnetic fields (B-field). The role of the B-field in ultrafast magnetization dynamics has been extensively studied, especially in the regime of linear response to THz fields [ 27 – 32 ] . At this picosecond timescale, few teslas (T) are required to introduce small deflections from the equilibrium magnetization direction, while tens of teslas are needed for achieving complete switching.…”

“…The role of the B-field in ultrafast magnetization dynamics has been extensively studied, especially in the regime of linear Correspondence to: Luis Sánchez-Tejerina, Grupo de Investigación en Aplicaciones del Láser y Fotónica, Departamento de Física Aplicada, Universidad de Salamanca, E-37008 Salamanca, Spain. Email: luis.sanchez-tejerina@uva.es response to THz fields [27][28][29][30][31][32] . At this picosecond timescale, few teslas (T) are required to introduce small deflections from the equilibrium magnetization direction, while tens of teslas are needed for achieving complete switching.…”