Charge and spin currents resulting from thermal gradient

Local Charge and Spin Currents in Magnetothermal Landscapes.
Mathias Weiler, Matthias Althammer, Franz D. Czeschka, Hans Huebl, Martin S. Wagner, Matthias Opel, Inga-Mareen Imort, Günter Reiss, Andy Thomas, Rudolf Gross, and Sebastian T. B. Goennenwein
Physics 5, 29 (2012)

Spin-Heat Vision
Roberto Myers, Joseph Heremans
Physics 5, 29 (2012)

(a) The scannable laser beam generates a local temperature gradient rT normal to the ferromagnetic thin film plane. The dc voltage VANE which arises due to the anomalous Nernst effect depends on the local magnetization M at the position ðx; yÞ of the laser beam. All investigated samples are patterned into 80 microm wide and 900 microm long Hall bars with contacts abeled as sketched. (b) VANE determined between contacts 2 and 4 as a function of the laser-spot position (x; y)and the external magnetic field magnitude H in a 50 nm thickCo2FeAl (CFA) film.