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Demonstration of polycrystalline thin film coatings on glass for spin Seebeck energy harvesting
Author(s) -
Caruana Andrew J.,
Cropper Michael D.,
Zipfel Jake,
Zhou Zhaoxia,
West Geoff D.,
Morrison Kelly
Publication year - 2016
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201600128
Subject(s) - thermopile , materials science , thermoelectric effect , crystallite , amorphous solid , optoelectronics , thin film , spin glass , engineering physics , thermoelectric materials , saturation (graph theory) , ceramic , condensed matter physics , nanotechnology , composite material , thermal conductivity , optics , metallurgy , chemistry , crystallography , physics , mathematics , engineering , combinatorics , infrared , thermodynamics
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 Fe 3 O 4 :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.