Thursday, January 31, 2013

1301.7313 (Daniel Meier et al.)

Thermally driven spin and charge currents in thin NiFe2O4/Pt films    [PDF]

Daniel Meier, Timo Kuschel, Liming Shen, Arunava Gupta, Takashi Kikkawa, Ken-ichi Uchida, Eiji Saitoh, Jan-Michael Schmalhorst, Günter Reiss
We present results on the longitudinal spin Seebeck effect (LSSE) shown by semiconducting ferrimagnetic NiFe2O4/Pt films from room temperature down to 50K base temperature. To the best of our knowledge, this is the first observation of spin caloric effect in NiFe2O4 thin films. The temperature dependence of the conductivity has been studied in parallel to obtain information about the origin of the electric potentials detected at the Pt coverage of the ferrimagnet in order to distinguish the LSSE from the anomalous Nernst effect. Furthermore, the dependence of the LSSE on temperature gradients as well as the influence of an external magnetic field direction is investigated.
View original: http://arxiv.org/abs/1301.7313

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