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Title: High-pressure x-ray diffraction study of YBO{sub 3}/Eu{sup 3+}, GdBO{sub 3}, and EuBO{sub 3}: Pressure-induced amorphization in GdBO{sub 3}

Angle-dispersive synchrotron X-ray diffraction measurements were performed on vaterite-type YBO{sub 3}/Eu{sup 3+}, GdBO{sub 3}, and EuBO{sub 3}, respectively, up to 41 GPa at room temperature using a diamond-anvil cell. Pressure-induced amorphization was observed in hexagonal GdBO{sub 3} with a significant compression along the c-axis. Compared to the ions of the distorted GdBO{sub 3} phase, its anions may lose their long-range order prior to the cations at high pressures. Based on the experimental pressure-volume data, the obtained bulk moduli of YBO{sub 3}/Eu{sup 3+} and GdBO{sub 3} are 329 and 321 GPa, respectively, which are more than 90% larger than that of EuBO{sub 3} (167 GPa) and are presumably attributed to Gd{sup 3+} and Y{sup 3+} with a high density of d valence electrons.
Authors:
; ; ; ; ; ; ; ;  [1] ;  [1] ;  [2] ; ;  [3]
  1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065 (China)
  2. (China)
  3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
Publication Date:
OSTI Identifier:
22275662
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMORPHOUS STATE; ANIONS; BORATES; CATIONS; COMPARATIVE EVALUATIONS; COMPRESSION; DIAMONDS; ELECTRONS; EUROPIUM COMPOUNDS; EUROPIUM IONS; GADOLINIUM COMPOUNDS; GADOLINIUM IONS; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; TEMPERATURE RANGE 0273-0400 K; VALENCE; X-RAY DIFFRACTION; YTTRIUM COMPOUNDS; YTTRIUM IONS