Issue 11, 2012
From the journal:

Journal of Materials Chemistry

Enhanced n-type thermopower in distortion-free LiMn2O4

Taylor D. Sparks,*a   Aleksander Gurlob  and  David R. Clarkea  

* Corresponding authors

a School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
E-mail: sparks@seas.harvard.edu
Fax: +01 (617)496 5333
Tel: +01 (617)495 6304

b Fachbereich Material- und Geowissenschaften, Technische Universität Darmstadt, Darmstadt, Germany

Abstract

A large n-type thermopower of −73 μV K−1 was observed at high temperatures (1100 K) for the first time in the mixed valence (Mn3+/Mn4+) spinel oxide LiMn2O4. The absence of a Jahn–Teller distortion leads to an electronic degeneracy ratio of 10/4 rather than 5/4 in the Heikes formula for the spin degeneracy contribution to the thermopower.

Graphical abstract: Enhanced n-type thermopower in distortion-free LiMn2O4

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Article information

DOI
https://doi.org/10.1039/C2JM16297K
Article type
Communication
Submitted
01 Dec 2011
Accepted
02 Feb 2012
First published
08 Feb 2012

J. Mater. Chem., 2012,22, 4631-4636

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Enhanced n-type thermopower in distortion-free LiMn2O4

T. D. Sparks, A. Gurlo and D. R. Clarke, J. Mater. Chem., 2012, 22, 4631 DOI: 10.1039/C2JM16297K

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