High-pressure phase transition in Ho2O3

被引：28

作者：

Lonappan, Dayana ^{[1
,2
]}

Shekar, N. V. Chandra ^{[1
]}

Ravindran, T. R. ^{[1
]}

Sahu, P. Ch. ^{[1
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Mat Sci Grp, Condensed Matter Phys Div, Kalpakkam 603102, Tamil Nadu, India

[2] Anna Univ, Ctr Crystal Growth, Madras 600025, Tamil Nadu, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 120卷 / 01期

关键词：

Holmium oxide; High-pressure; XRD; Raman; Phase transition; SPECTROSCOPY; SESQUIOXIDES; LINE;

D O I：

10.1016/j.matchemphys.2009.10.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-pressure X-ray diffraction and Raman studies on holmium sesquioxide (Ho2O3) have been carried out up to a pressure of similar to 17 GPa in a diamond-anvil cell at room temperature. Holmium oxide, which has a cubic or bixbyite structure under ambient conditions, undergoes an irreversible structural phase transition at around 9.5GPa. The high-pressure phase has been identified to be low symmetry monoclinic type. The two phases coexist to up to about 16 GPa, above which the parent phase disappears. The high-pressure laser-Raman studies have revealed that the prominent Raman band similar to 370 cm(-1) disappears around the similar transition pressure. The bulk modulus of the parent phase is reported. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：65 / 67

页数：3

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