  We propose a method for the simultaneous determination of the Seebeck or
Peltier coefficient and thermal conductivity of multiple materials, enabling
the high-throughput estimation of the thermoelectric figure of merit. This
method is based on the lock-in thermography (LIT) technique and thermal
analyses of the transient temperature distribution induced by the Peltier
effect and Joule heating. The proposed method has high reproducibility and
reliability because it offers sensitive noncontact temperature measurements and
does not require the installation of an external heater. By performing the same
measurements and analyses with applying an external magnetic field, the field
dependence of the Seebeck or Peltier coefficient and thermal conductivity can
be determined simultaneously. We demonstrate the validity of this method by
using several ferromagnetic metals (Ni, Ni$_{95}$Pt$_{5}$, and Fe) and a
nonmagnetic metal (Ti). The LIT-based approach will be useful for materials
research in thermoelectrics and investigation of magneto-thermal and
magneto-thermoelectric transport properties.
