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Phase transitions i...
Phase transitions in heated Sr2MgTeO6 double perovskite oxide probed by X-ray diffraction and Raman spectroscopy
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Manoun, B. (författare)
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Tamraoui, Y. (författare)
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- Lazor, Peter (författare)
- Uppsala universitet,Berggrundsgeologi
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Yang, Wenge (författare)
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(creator_code:org_t)
- AIP Publishing, 2013
- 2013
- Engelska.
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Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 103:26, s. 261908-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Nyckelord
- Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
- Geovetenskap med inriktning mot mineralogi, petrologi och tektonik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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