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Phase transitions i...
Phase transitions in heated Sr2MgTeO6 double perovskite oxide probed by X-ray diffraction and Raman spectroscopy
- Artikel/kapitelEngelska2013
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AIP Publishing,2013
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LIBRIS-ID:oai:DiVA.org:uu-213780
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-213780URI
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https://doi.org/10.1063/1.4860515DOI
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Språk:engelska
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Sammanfattning på:engelska
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Double-perovskite oxide Sr2MgTeO6 has been synthetized, and its crystal structure was probed by the technique of X-ray diffraction at room temperature. The structure is monoclinic, space group I2/m. Temperature-induced phase transitions in this compound were investigated by Raman spectroscopy up to 550 °C. Two low-wavenumber modes corresponding to external lattice vibrations merge at temperature of around 100 °C, indicating a phase transition from the monoclinic (I2/m) to the tetragonal (I4/m) structure. At 300 °C, changes in the slopes of temperature dependencies of external and O–Te–O bending modes are detected and interpreted as a second phase transition from the tetragonal (I4/m) to the cubic (Fm-3m) structure.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Tamraoui, Y.
(författare)
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Lazor, PeterUppsala universitet,Berggrundsgeologi(Swepub:uu)petelazo
(författare)
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Yang, Wenge
(författare)
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Uppsala universitetBerggrundsgeologi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Applied Physics Letters: AIP Publishing103:26, s. 261908-0003-69511077-3118
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