Generation of third-harmonic spin oscillation from strong spin precession induced by terahertz magnetic near fields.

ABSTRACT: The ability to drive a spin system to state far from the equilibrium is indispensable for investigating spin structures of antiferromagnets and their functional nonlinearities for spintronics. While optical methods have been considered for spin excitation, terahertz (THz) pulses appear to be a more convenient means of direct spin excitation without requiring coupling between spins and orbitals or phonons. However, room-temperature responses are usually limited to small deviations from the equilibrium state because of the relatively weak THz magnetic fields in common approaches. Here, we studied the magnetization dynamics in a HoFeO₃ crystal at room temperature. A custom-made spiral-shaped microstructure was used to locally generate a strong multicycle THz magnetic near field per

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC10066181 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature