Demonstration of polycrystalline thin film coatings on glass for spin Seebeck energy harvesting
journal contributionposted on 19.07.2016, 11:28 by Andrew J. Caruana, Michael CropperMichael Cropper, Jake Zipfel, Zhaoxia ZhouZhaoxia Zhou, G.D. West, Kelly MorrisonKelly Morrison
The spin Seebeck effect, a newly discovered phenomena, has been suggested as a potential ‘game changer’ for thermoelectric technology due to the possibility of separating the electric and thermal conductivities. This is due to a completely different device architecture where, instead of an arrangement of p- and n-type pillars between two ceramic blocks, a thermopile could be deposited directly onto a magnetic film of interest. Here we report on the spin Seebeck effect in polycrystalline Fe3O4 :Pt bilayers deposited onto amorphous glass substrates with a view for economically viable energy harvesting. Crucially, these films exhibit large coercive fields (197 Oe) and retain 75% of saturation magnetisation, in conjunction with energy conversion comparable to epitaxially grown films. This demonstrates the potential of this technology for widespread application in harvesting waste heat for electricity.
This work was supported by EPSRC First Grant (EP/L024918/1).