A comparative study of spin Seebeck effect and anomalous Nernst effect in a ferromagneticmetal/normal-metal bilayer system.*

In the emerging field of Spin Caloritronics, the central interest is the study of the interactions of spins with heat current. Thus a pure spin current got an enormous importance for such kind of studies. On the other hand, spin seebeck effect (SSE) pertains to the generation of pure spin current under application of a thermal gradient across a magnetic material. Although for magnetic-metals, the SSE signal is contaminated by the anomalous Nernst signals (ANE). In this work, we identify and investigate longitudinal spin seebeck effect (LSSE) phenomenon in La_0.7Ca_0.3MnO₃ /Pt bilayer system over a wide temperature range 20K ≤ T ≤ 295K. We separate out LSSE from the ANE. Further a detailed-analysis on LSSE shows a very good agreement with the current theoretical models.