Article (Scientific journals)
Investigation of electron and phonon transport in Bi-doped CaMnO3 for thermoelectric applications
Suprayoga, E; Putri, WBK; Singsoog, K et al.
2021In Materials Research Bulletin, 141, p. 111359
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Keywords :
Thermoelectrics; Characterization; CaMnO3
Abstract :
[en] The electron and phonon transports in CaMnO3 and in one of its Bi-doped counterparts, namely, Bi0.03Ca0.97MnO3, are investigated using the thermoelectric transport measurements and first-principles calculations. We find that antiferromagnetic insulator CaMnO3 breaks the Wiedemann–Franz law with the Lorenz number reaching four times that of ordinary metals at room temperature. Bismuth doping reduces both the electrical resistivity and Seebeck coefficient of CaMnO3; thus, it recovers the Wiedemann–Franz law behavior. In addition, Bi0.03Ca0.97MnO3 possesses a shorter phonon lifetime according to the transport measurements. As a result, Bi0.03Ca0.97MnO3 exhibits superior thermoelectric properties over pristine CaMnO3 owing to the lower thermal conductivity and electrical resistivity.
Disciplines :
Physics
Author, co-author :
Suprayoga, E
Putri, WBK
Singsoog, K
Paengson, S
Hanna, MY
Nugraha, ART
Munazat, DR
Kurniawan, B
Seetawan, T
Hasdeo, Eddwi Hesky  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
External co-authors :
yes
Language :
English
Title :
Investigation of electron and phonon transport in Bi-doped CaMnO3 for thermoelectric applications
Publication date :
19 April 2021
Journal title :
Materials Research Bulletin
ISSN :
0025-5408
Publisher :
Elsevier, Oxford, United Kingdom
Volume :
141
Pages :
111359
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Available on ORBilu :
since 18 January 2021

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