High pressure behavior of ZrGeO4: A Raman spectroscopic and photoluminescence study

被引：9

作者：

Rao, Rekha ^{[1
]}

Sakuntala, T. ^{[2
]}

Achary, S. N. ^{[3
]}

Tyagi, A. K. ^{[3
]}

机构：

[1] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India

[2] Dept Atom Energy, Strateg Planning Grp, Bombay 400001, Maharashtra, India

[3] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 12期

关键词：

crystal field interactions; crystal symmetry; europium; high-pressure solid-state phase transformations; librational states; photoluminescence; Raman spectra; zirconium compounds; INDUCED PHASE-TRANSITIONS; EU3+ LUMINESCENCE; ZIRCON ZRSIO4; STABILITY; TEMPERATURE; CRYSTAL; OXIDES; HFGEO4; PROBE; IONS;

D O I：

10.1063/1.3270433

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High pressure behavior of ZrGeO4 has been investigated using Raman and photoluminescence (PL) spectroscopies up to 25 GPa in a diamond anvil cell. Under the application of pressure, the GeO4 librational mode exhibits softening, suggesting dynamical instability of the scheelite structure. Qualitative changes are noted in the Raman spectrum above 12 GPa, suggesting a possible transition around this pressure. High pressure PL behavior of Eu3+-related crystal field transitions indicates a clear change in the site symmetry of Eu3+ around 12 GPa, strongly supporting structural transition to a lower symmetry phase at this pressure.

引用

页数：5

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