Phase transitions in heated Sr{sub 2}MgTeO{sub 6} double perovskite oxide probed by X-ray diffraction and Raman spectroscopy
Double-perovskite oxide Sr{sub 2}MgTeO{sub 6} 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 spectro...
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| Veröffentlicht in: | Applied physics letters 2013-12, Vol.103 (26) |
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| creator | Manoun, Bouchaib Tamraoui, Y. Lazor, P. Yang, Wenge |
| description | Double-perovskite oxide Sr{sub 2}MgTeO{sub 6} 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. |
| doi_str_mv | 10.1063/1.4860515 |
| format | Article |
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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.</abstract><cop>United States</cop><doi>10.1063/1.4860515</doi></addata></record> |
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| ispartof | Applied physics letters, 2013-12, Vol.103 (26) |
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| language | eng |
| recordid | cdi_osti_scitechconnect_22253143 |
| source | AIP Digital Archive; Alma/SFX Local Collection; AIP Journals (American Institute of Physics) |
| subjects | CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY LATTICE VIBRATIONS MATERIALS SCIENCE MONOCLINIC LATTICES PEROVSKITE PHASE TRANSFORMATIONS PROBES RAMAN SPECTROSCOPY SPACE GROUPS TEMPERATURE RANGE 0273-0400 K TETRAGONAL LATTICES X-RAY DIFFRACTION |
| title | Phase transitions in heated Sr{sub 2}MgTeO{sub 6} double perovskite oxide probed by X-ray diffraction and Raman spectroscopy |
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