Brillouin light scattering spectra as local temperature sensors for thermal magnons and acoustic phonons
Brillouin light scattering spectra as local temperature sensors for thermal magnons and acoustic phonons
We demonstrate the use of the micro-Brillouin light scattering (micro-BLS) technique as a local temperature sensor for magnons in a permalloy (Py) thin film and phonons in the glass substrate. When the Py film is uniformly heated, we observe a systematic shift in the frequencies of two thermally excited perpendicular …