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High temperature transport properties of BaZn_2Sn_2

Aydemir, U. and Zevalkink, A. and Bux, S. and Snyder, G. J. (2015) High temperature transport properties of BaZn_2Sn_2. Journal of Alloys and Compounds, 622 . pp. 402-407. ISSN 0925-8388 . http://resolver.caltech.edu/CaltechAUTHORS:20141110-091759744

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Abstract

BaZn_2Sn_2 (space group P4/nmm, a = 4.7459(5) Å, c = 11.330(2) Å, Z = 2) crystallizes in the CaBe_2Ge_2 structure type with a polyanionic framework comprising alternately stacked PbO-like {ZnSn_(4/4)} and anti-PbO-like {SnZn_(4/4)} layers along the c-axis. BaZn_2Sn_2 samples were obtained by either direct solid state reaction of the elements or from a Sn-flux method in very high yield with very small amount of β-Sn as the secondary phase. The samples were characterized by powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM). The chemical compositions were determined to be off-stoichiometric with Zn/Sn ratio lower than 1.0 and Sn_2 atoms in the crystal structure were found to be either loosely bonded or not bonded which might lead to an incomplete charge balance. Electrical and thermal transport measurements have been performed in the temperature range 300–773 K. BaZn_2Sn_2 displays the electrical resistivity of a metal (or semimetal) along with very low Seebeck coefficients and relatively high thermal conductivity.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.jallcom.2014.10.090DOIArticle
http://www.sciencedirect.com/science/article/pii/S0925838814025109PublisherArticle
ORCID:
AuthorORCID
Snyder, G. J.0000-0003-1414-8682
Alternate Title:High temperature transport properties of BaZn2Sn2
Additional Information:© 2014 Elsevier B.V. Received 24 July 2014; Received in revised form 22 September 2014; Accepted 18 October 2014; Available online 27 October 2014 U. Aydemir acknowledges the financial assistance of The Scientific and Technological Research Council of Turkey. This research was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration and was supported by the NASA Science Missions Directorate’s Radioisotope Power Systems Technology Advancement Program.
Funders:
Funding AgencyGrant Number
Scientific and Technological Research Council of Turkey (TÜBİTAK)UNSPECIFIED
NASAUNSPECIFIED
Subject Keywords:Stannides; Zintl phase; Tin-flux; Crystal structure; Electronic transport; Thermal transport
Record Number:CaltechAUTHORS:20141110-091759744
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141110-091759744
Official Citation:Aydemir, U., Zevalkink, A., Bux, S., & Snyder, G. J. (2015). High temperature transport properties of BaZn2Sn2. Journal of Alloys and Compounds, 622(0), 402-407. doi: http://dx.doi.org/10.1016/j.jallcom.2014.10.090
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51487
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:10 Nov 2014 18:23
Last Modified:18 Nov 2016 17:10

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