Anomalous reversal of transverse thermoelectric voltage in Co delta Fe100-delta/YIG junction

作者：Ramos R^*; Wongjom P; Iguchi R; Yagmur A; Qiu Z; Pinitsoontorn S; Uchida K; Saitoh E

来源：Journal of Magnetism and Magnetic Materials, 2018, 447: 134-138.

DOI：10.1016/j.jmmm.2017.09.034

• Spintronics
• Spin caloritronics
• Spin Seebeck effect
• Anomalous Nernst effect

We have studied thermoelectric conversion in all-ferromagnetic Co delta Fe100-delta/YlG bilayer junctions as a function of the chemical composition delta. We performed measurements of the transverse thermoelectric voltage upon application of a magnetic field. The voltage measured in the longitudinal spin Seebeck effect configuration shows a sign reversal at delta = 40%, which cannot be explained by the conventional electronic transport, such as the anomalous Nernst and Hall effects in the Co delta Fe100-delta layer. Our results suggest a possible role of the sd-type exchange interaction between Co40Fe60 and YIG at the interface as a possible origin for the observed behavior.

• 出版日期2018-2-1