SYNTHESIS AND PROPERTIES OF SR1-XLAXMO5O8 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1) - A NEW CLASS OF OXIDES WITH METALLIC PROPERTIES

Citation
Wh. Mccarroll et al., SYNTHESIS AND PROPERTIES OF SR1-XLAXMO5O8 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1) - A NEW CLASS OF OXIDES WITH METALLIC PROPERTIES, Journal of solid state chemistry (Print), 138(1), 1998, pp. 7-17
Citations number
21
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Physical
ISSN journal
00224596
Volume
138
Issue
1
Year of publication
1998
Pages
7 - 17
Database
ISI
SICI code
0022-4596(1998)138:1<7:SAPOS0>2.0.ZU;2-G
Abstract
Single crystal and oriented polycrystal specimens of the solid solutio n between SrMo5O8 and LaMo5O8 have been prepared by fused salt electro lysis. The La/Sr ratios of the solid solution members formed are highl y sensitive to the melt composition. Both end members of this series a re semiconducting at room temperature, with the La compound displaying complex low-temperature behavior. On the other hand the solid solutio ns become metallic over the range 300-20 K when a few atom % of either La or Sr are present. Detailed structural investigations by single cr ystal X-ray and powder neutron diffraction at ambient and low temperat ures failed to reveal any changes in the Mo-Mo or Mo-O network that wo uld account for the observed anomalies in the electronic properties. T he composition-controlled semiconductor-to-metal transition can be exp lained on the basis of a simple qualitative band model. (C) 1998 Acade mic Press.