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Synthesis and resistivity properties of Sr1-xLaxPbO3-delta and SrPb1-xBixO3-deltaстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Lobanov M.V., Kopnin E.M., Xenikos D., Grippa A.J., Antipov E.V., Capponi J.J., Marezio M., Julien J.P., Tholence J.L.
- Журнал: Materials Research Bulletin
- Том: 32
- Номер: 8
- Год издания: 1997
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 983
- Последняя страница: 992
- DOI: 10.1016/S0025-5408(97)00085-8
- Аннотация: The solid solutions with the composition SrPb1-xBixO3-delta and Sr1-xLaxPbO3-delta were synthesized. It was found that the solubility limits do not exceed the values x = 0.2 and x = 0.1, respectively. It was shown by X-ray powder diffraction that the initial crystal symmetry (orthorhombic, space group Pnma) remains unchanged with the substitution, whereas unit cell parameters increase monotonically. The undoped SrPbO3-delta exhibit positive and negative temperature coefficient of resistivity at high and low temperatures, respectively. La-doping leads to a drastical decrease of the absolute value of the resistivity and for the doped samples with x greater than or equal to 0.05 d rho/dT is positive in the entire temperature range. Bi-doping leads, first to a similar decrease of resistivity, but at higher substitutions, variable range hopping conduction is observed. The results were interpreted in terms of quantum interference and a subsequent transition to localized electronic states. (C) 1997 Elsevier Science Ltd.
- Добавил в систему: Лобанов Максим Владимирович