Spin Seebeck effect in Cu2OSeO3 : Test of bulk magnon spin current theory

摘要

We report measurements of the low-temperature (T <= 15 K) longitudinal spin Seebeck coefficient (S-LSSE) in bulk single crystals of the helimagnetic insulator Cu2OSeO3 with Pt contacts. Simultaneous measurement of both S-LSSE and the magnon thermal conductivity (kappa(m)) demonstrates their correlation and allows for quantitative and favorable comparison to bulk magnon spin current theory.