Structural characterization of Lu1.8Y0.2SiO5 crystals

Chiriu  D; Faedda  N; Lehmann  AGRicci  PCAnedda  ADesgreniers  SFortin  E

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Structural characterization of Lu1.8Y0.2SiO5 crystals

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The structural and vibrational properties of Lu1.8Y0.2SiO5 (LYSO) single crystals were investigated by means of Raman spectroscopy and x-ray diffraction measurements. Unit cell parameters and bond lengths were determined by Rietveld refinement of the collected x-ray diffraction powder spectra. By comparison with the vibrational spectra of the parent compounds Lu2SiO5 and Y2SiO5 and by using polarized Raman measurements, we propose the assignment of the principal vibrational modes of LYSO crystals. The strict connection of Raman spectra of the LYSO solid solution and of the pure lutetium and yttrium crystals, as well as the analysis of the polarized measurements, confirms that LYSO structure adopts the C2/c space group symmetry. The structural analogies of LYSO with the pure compound Lu2SiO5 are further shown by means of high pressure Raman spectroscopy, and the possibility of considering the LYSO crystal analogous to the LSO structure with a tensile stress between 0.25 and 0.80 GPa is discussed.

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《Physical review, B. Condensed matter and materials physics》 |2007年第5期|4112-1-4112-8-0|共8页
作者
Chiriu D; Faedda N; Lehmann AGRicci PCAnedda ADesgreniers SFortin E;
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作者单位

Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy;

Univ Cagliari, Lab CGS, I-09042 Monserrato, CA, Italy;

Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada;

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正文语种英语
中图分类固体物理学;
关键词
RARE-EARTH; SCINTILLATION PROPERTIES; X-RAY; LSO; LYSO; OXYORTHOSILICATES; GROWTH; SITES; OXIDE; CE;

Structural characterization of Lu1.8Y0.2SiO5 crystals

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