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Electronic phase engineering induced thermoelectric enhancement in manganites
Nanjing Univ, Peoples R China.
Nanjing Univ, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Nanjing Univ, Peoples R China.
Nanjing Univ, Peoples R China.
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2018 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 124, no 3, article id 034501Article in journal (Refereed) Published
Abstract [en]

The nano-structuring engineering and the introduction of magnetic scattering are effective ways to enhance the thermoelectric performance. In this work, we use the magnetic treatments on La0.4Pr0.225Ca0.375MnO3 to demonstrate that the electronic phase engineering can enhance the thermoelectric performance by simultaneously reducing the thermal conductivity and raising the power factor in a strongly correlated electron system. This study indicates that the magnetic treatment changes the phase separation state and impedes the growth of ferromagnetic metal (FMM) phase. The reduction of FMM phase suppresses the bipolar effect, which raises the Seebeck coefficient and the power factor, reduces the thermal conductivity, and therefore enhances the thermoelectric performance.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2018. Vol. 124, no 3, article id 034501
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-150260DOI: 10.1063/1.5026868ISI: 000439939600020OAI: oai:DiVA.org:liu-150260DiVA, id: diva2:1239765
Note

Funding Agencies|National Key Research Programme of China [2016YFA0300101, 2016YFA0201004]; National Natural Science Foundation of China [51431006, 11374112]; Fundamental Research Funds for the Central Universities [020414380063]

Available from: 2018-08-17 Created: 2018-08-17 Last updated: 2018-09-06

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