16:00 〜 18:00
▲ [7p-PA10-2] Imaging of thermal Hall effect
キーワード：thermal Hall effect, thermography, ferromagnetic material
The thermal Hall effect (THE), or the Righi-Leduc effect, refers to the generation of a transverse temperature gradient along the cross product of an applied heat current and a magnetic field. The temperature gradient induced by the THE changes its polarization depending on that of the applied heat current, and the direction and magnitude can be controlled by those of the filed, enabling nonreciprocal heat manipulation. The driving force is due to electromagnetic and quantum-mechanical forces acting on electrons, phonons, and magnetic excitations, carrying energy in solids. We will report a new measurement method for the THE based on the lock-in thermography (LIT) technique, which realizes the spatial imaging of the THE by directly extracting the magnetic-field-dependent temperature-modulation.