English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/181922
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Effects of K substitution on thermoelectric and magnetic properties of Bi2Sr2Co2Oy ceramic

AuthorsÇetin Karakaya, G.; Özçelik, B.; Torres, M. A.; Madre, M. A.; Sotelo, A.
Issue Date2017
PublisherSpringer
CitationJournal of Materials Science: Materials in Electronics 28(17): 12652-12659 (2017)
AbstractIn this work, Bi2Sr2−xKxCo2Ox thermoelectric materials with x = 0.0, 0.025, 0.050, 0.075, 0.10, 0.125, and 0.15 have been produced through the classical solid-state reaction. SEM characterization has shown an improvement of microstructure and a porosity decrease with K substitution, leading to very high densities, confirmed by apparent density measurements. These modifications have been reflected in a drastic decrease of electrical resistivity with slight modification of Seebeck coefficient. As a consequence, power factor has been increased in all the K doped samples, reaching the maximum values (0.192 mW/K2 m at 650 °C) in 0.075 K containing samples, which is fairly close to the reported values in single crystals. Magnetic results have shown that all samples are paramagnetic above 50 K and below they undergo to an antiferromagnetic phase transition. From temperature dependence of magnetic hysteresis, it has been observed that the slope of curves and the magnitude of magnetization have been increased when the temperature is decreased.
Publisher version (URL)https://doi.org/10.1007/s10854-017-7090-4
URIhttp://hdl.handle.net/10261/181922
DOI10.1007/s10854-017-7090-4
ISSN0957-4522
E-ISSN1573-482X
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf59,24 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.