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Crystal structure and high temperature Raman spectroscopy of Sr2ZnTeO6 double perovskite
Univ Hassan 1Er, Lab Sci Mat Milieux & Modelisat LS3M, Khouribga 25000, Morocco.;Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco..
Univ Hassan 1Er, Lab Sci Mat Milieux & Modelisat LS3M, Khouribga 25000, Morocco.;Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco..
Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco.;Univ Cadi Ayyad, FST Marrakech, LCME, Av A Khattabi, Marrakech 40000, Morocco..
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics.ORCID iD: 0000-0001-9992-8009
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2017 (English)In: MATERIALS RESEARCH EXPRESS, ISSN 2053-1591, Vol. 4, no 10, article id 105018Article in journal (Refereed) Published
Abstract [en]

Sr2ZnTeO6 double-perovskite oxide has been synthesized using solid state chemistry. As synthesized, the crystalline structure of Sr2ZnTeO6, refined using x-ray diffraction, is monoclinic having the space group I2/m. Structural phase transitions are studied using Raman spectroscopy in the temperature range 25 degrees C-567 degrees C. It is found that two of three observed bending Raman vibrations merge together at a temperature of around 120 degrees C, indicating a Sr2ZnTeO6 phase transition from the monoclinic (I2/m) to the tetragonal (I4/m). Furthermore, a temperature-dependence change-rate of external and O-Te-O bending modes and stretching modes are detected at 270 degrees C, which is interpreted as a phase transition from the tetragonal (I4/m) to the cubic (Fm-3m) structure.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2017. Vol. 4, no 10, article id 105018
Keywords [en]
double perovskite, phase transition, Raman spectroscopy, Sr2ZnTeO6
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-342607DOI: 10.1088/2053-1591/aa8d87ISI: 000415251700004OAI: oai:DiVA.org:uu-342607DiVA, id: diva2:1185084
Funder
Swedish Research Council, 348-2014-4287Available from: 2018-02-23 Created: 2018-02-23 Last updated: 2018-02-23Bibliographically approved

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Lazor, Peter

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