Electrical resistivity modulation of thermoelectric iron based nanocomposites

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Fältnamn	Indikatorer	Metadata
000		02974naa a2200361 4500
001		oai:DiVA.org:liu-152809
003		SwePub
008		181122s2018 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1528092 URI
024	7	a https://doi.org/10.1016/j.vacuum.2018.09.0112 DOI
040		a (SwePub)liu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Music, Denisu Rhein Westfal TH Aachen, Germany4 aut
245	1 0	a Electrical resistivity modulation of thermoelectric iron based nanocomposites
264	1	b PERGAMON-ELSEVIER SCIENCE LTD,c 2018
338		a print2 rdacarrier
500		a Funding Agencies\|Deutsche Forschungsgemeinschaft (DFG) [MU 2866/2]; AForsk Foundation [16-359]; Carl Tryggers Foundation [CTS 17:166]; JARA-HPC from RWTH Aachen University [JARA0131]
520		a Iron oxides are promising thermoelectrics, but their high electrical resistivity impedes broader applications. In this work, we have studied Fe oxides with metallic contributions. Pt and Ir additions are also considered to enhance the valence electron concentration and further modify the transport properties. Based on density functional theory explorations, Fe based clusters (Fe-3, Fe-4, and Fe3Pt) are suggested to act as nucleation sites for metallic crystallites, while O leads to formation of an amorphous matrix. This has been validated by transmission electron microscopy and x-ray photoelectron spectroscopy of sputter-grown Fe-Pt-Ir-O thin films. Densely packed bcc Fe grains, approx. 2-3 nm in diameter, are embedded in an amorphous Fe-O matrix in the as-grown state. The Seebeck coefficient reaches even -411 mu V K-1 and the electrical resistivity is up to 5 orders of magnitude lower than that of previously reported literature data on Fe oxides. We suggest that this peculiarity of our films is due to finite states localized at the Fermi level in these nanocomposites.
650	7	a NATURVETENSKAPx Kemix Oorganisk kemi0 (SwePub)104042 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciencesx Inorganic Chemistry0 (SwePub)104042 hsv//eng
653		a Thermoelectric; Nanocomposites; Sputtering; Density functional theory
700	1	a Schmidt, Paulu Rhein Westfal TH Aachen, Germany4 aut
700	1	a Czigany, Zsoltu Hungarian Acad Sci, Hungary4 aut
700	1	a Greczynski, Grzegorzu Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten4 aut0 (Swepub:liu)grzgr49
700	1	a Geyer, Richard W.u Rhein Westfal TH Aachen, Germany4 aut
700	1	a Hans, Marcusu Rhein Westfal TH Aachen, Germany4 aut
710	2	a Rhein Westfal TH Aachen, Germanyb Hungarian Acad Sci, Hungary4 org
773	0	t Vacuumd : PERGAMON-ELSEVIER SCIENCE LTDg 157, s. 384-390q 157<384-390x 0042-207Xx 1879-2715
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-152809
856	4 8	u https://doi.org/10.1016/j.vacuum.2018.09.011

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Av författaren/redakt...: Music, Denis; Schmidt, Paul; Czigany, Zsolt; Greczynski, Grze ...; Geyer, Richard W ...; Hans, Marcus

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Av lärosätet: Linköpings universitet

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