Growth and thermoelectric properties of CaMnO3-based thin films

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MARC

Ekström, Erik,1989-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten (author)

Growth and thermoelectric properties of CaMnO3-based thin films

BookEnglish2018

Publisher, publication year, extent ...

2018-08-29
Linköping :Linköping University Electronic Press,2018
50 s.
electronicrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:liu-150618
ISBN:9789176852620
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150618URI
https://doi.org/10.3384/lic.diva-150618DOI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:vet swepub-contenttype
Subject category:lic swepub-publicationtype

Series

Linköping Studies in Science and Technology. Licentiate Thesis,0280-7971 ;1811

Notes

The field of them1oelectrics started in early 19th century. Since the discovery of the Seebeck effect and the Peltier effect, thermoelectric modules have found their way into, mostly, niche applications such as radioisotope thermoelectric generators on space missions. Thermoelectric modules can also be used for cooling, utilizing the Peltier effect.Thermoelectrics are promising materials due to the operation nature of the modules. That is, they have no moving parts, no exhaust, long lifetime without maintenance, features that make them attractive for many applications. Despite these promising properties, thermoelectric modules are mostly used in niche applications. The main reason for this is conventional modules with the highest efficiency are commonly made of expensive and/or rare elements which prevents mass production.To tackle this problem, new materials are investigated to find a module that can be made widely available. Oxides are one possibility, where an added benefit is that they are chemically stable even at elevated temperature. The perovskite CaMnO3 is one of the more promising oxides, with elements that are abundant on earth and cheap. The material does suffer from low electrical conductivity which results in a low electrical conductivity and efficiency. A substantial effort has been put in to increase the efficiency of CaMnO3, hut it still needs improvement.In my thesis, I have investigated the CaMnO3 system. CaMnO3 was synthesized using co-reactive RF-magnetron sputtering and post annealing. The synthesis method is already known hut has not been used for deposition of perovskites. I have also demonstrated that this synthesis method can be used to dope CaMnO3 with niobium at appropriate levels for enhancing the efficiency.

Subject headings and genre

NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng

Added entries (persons, corporate bodies, meetings, titles ...)

Eklund, Per,1977-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)perek02 (thesis advisor)
Eriksson, Fredrik,1975-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)freer90 (thesis advisor)
Paul, Biplab,1980-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)bippa36 (thesis advisor)
Lewin, Erik,Ph.D.Uppsala University, Sweden (opponent)
Linköpings universitetTunnfilmsfysik (creator_code:org_t)

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