In this article, we briefly recall the physical mechanisms at the origin of the Barkhausen effect in
ferromagnetic mediums and the thermoelectric power in conductor metals. We then present, for each of
these phenomena, the measurement principles and their sensitivity to the microstructural state, notably in
the case of precipitation phenomena and in the ones linked to plastic deformation. Finally, in the case of
the formation of precipitates in an iron-based alloy, we show the complementarity of both techniques.