Spin-dependent thermal transport
In the newly developed field of spin caloritronics, one exploits the interaction of charge, spin, and heat. We demonstrated that in the transverse spin Seebeck effect geometry with in-plan temperature gradient, unintentionally, there also exists an out-of-plane temperature gradient due to the overwhelming thermal conduction through the much thicker substrate. The heat current alone the out-of-plane temperature direction generates an anomalous Nernst effect voltage. However, when turning to substrate free sample, we are able to observe the intrinsic spin-dependent thermal transport. Our systematic studies show that this effect is very sensitive to temperature difference and magnetization direction.
-S. Y. Huang, W. G. Wang, S. F. Lee, J. Kwo, and C. L. Chien, Intrinsic spin-dependent thermal transport, Phys. Rev. Lett. 107, 216604 (2011). Editor highlights on Physics Synopsis: Thermal Spintronics on a Firm Footing; Selected for the Nov. 28, (2011) issue 22 of Virtual Journal of Nanomagnetism and spintronics.
-S. Y. Huang, W. G. Wang, D. Qu, S. F. Lee, J. Kwo, and C. L. Chien, Thermal spin transport and application, invited paper on IEDM Digest, 12, 255-258 (2012).
-S. Y. Huang, D. Qu. and C. L. Chien, Charge, Spin, and Heat Transport in the Proximity of Metal/Ferromagnet Interface, Recent Advances in Magnetics Insulators - From Spintronics to Microwave Applications (A Special Issue of “Solid State Physics” Series 2013).