Spin Seebeck insulator.

By Ken-ichi Uchida, Jiang Xiao, Hiroto Adachi, J. Ohe, S. Takahashi, J. Ieda, T. Ota, Y. Kajiwara, H. Umezawa, H. Kawai and 3 more. Nature Materials, 2010

1,037 citations recorded by the source corpus.

Thermoelectric generation is an essential function in future energy-saving technologies. However, it has so far been an exclusive feature of electric conductors, a situation which limits its application; conduction electrons are often problematic in the thermal design of devices. Here we report electric voltage generation from heat flowing in an insulator. We reveal that, despite the absence of conduction electrons, the magnetic insulator LaY(2)Fe(5)O(12) can convert a heat flow into a spin voltage. Attached Pt films can then transform this spin voltage into an electric voltage as a result of the inverse spin Hall effect. The experimental results require us to introduce a thermally activated interface spin exchange between LaY(2)Fe(5)O(12) and Pt. Our findings extend the range of potential materials for thermoelectric applications and provide a crucial piece of information for understanding the physics of the spin Seebeck effect.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/8df466b20109905323a63de2e10484cc22f2e84e

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In Atomic and Molecular Physics, and Optics

In Condensed Matter Physics

Citations in the corpus

Critical suppression of spin Seebeck effect by magnetic fields (2015, methodology): “To investigate the high-magnetic-field behavior of the LSSE, we used Pt/YIG junction systems, which are now recognized as a model system for studying spin-current physics [8, 15].”
Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems (2018, neutral): “caloritronics experiments (Bauer et al., 2012; Uchida et al., 2010).”
Spin-dependent phenomena and device concepts explored in (Ga,Mn)As (2013, methodology): “In this seminal work and in the subsequent experiments, the SHE in attached non-magnetic electrodes was employed to convert the difference in spin-dependent chemical potentials into electrical voltages (Jaworski et al., 2010; Uchida et al., 2008, 2010).”
Spin Hall Effects in Metals (2013, background): “Toward this end, the discovery of similar effects due to thermal gradients in ferromagnetic insulators [208]–[217] suggested that magnon-mediated thermal spin currents may be important, but the exact understanding of the experimental observations is still controversial.”
Antiferromagnetic spintronics (2016, background): “The prototypical example of this was established by the demonstration of the spin Seebeck effect at the interface between a heavy metal and ferrimagnetic yttrium iron garnet (K. Uchida et al., 2010a, 2010b).”