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Title: Pressure-induced amorphization of La(1/3)NbO3
Authors: Noked, O
Yakovlev, S
Greenberg, Y
Garbarino, G
Shuker, R
Avdeev, M
Sterer, E
Keywords: Perovskite
Raman Spectroscopy
Niobium Oxides
X-ray Diffraction
Issue Date: 15-Sep-2011
Publisher: ELSEVIER
Citation: Noked, O., Yakovlev, S., Greenberg, Y., Garbarino, G., Shuker, R., Avdeev, M., Sterer, E. (2011). Pressure-induced amorphization of La(1/3)NbO(3). Journal of Non-Crystalline Solids, 357(18), 3334-3337.
Abstract: La(1/3)NbO(3), an A-site cation deficient double perovskite, has been studied under pressure by synchrotron X-ray powder diffraction and Raman spectroscopy. In contrast to other highly distorted perovskites, transforming to post-perovskite on compression, La(1/3)NbO(3) undergoes irreversible pressure induced amorphization at similar to 14.5 GPa. Over a wide range of pressure before that transition it presents an almost linear volume decrease versus pressure, accompanied by convergence form orthorhombic to a cubic unit cell. The Raman spectroscopy also shows an amorphization at the same pressure. However, where upon full decompression the X-ray diffraction pattern remains amorphous, new Raman peaks become active. (C) 2011 Elsevier B.V. All rights reserved.
ISSN: 0022-3093
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