Journal
JOURNAL OF APPLIED PHYSICS
Volume 115, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4862653
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Funding
- National Natural Science Foundation of China [11027405]
- China 973 Program [2011CB808200]
- National Natural Science Foundation of China
- Scientific Instrumentation Chinese Academy of Sciences Fund [U1332104]
- Chinese Academy of Sciences [KJCX2-SW-N03, KJCX2-SW-N20]
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Angle-dispersive synchrotron X-ray diffraction measurements were performed on vaterite-type YBO3/Eu3+, GdBO3, and EuBO3, respectively, up to 41 GPa at room temperature using a diamond-anvil cell. Pressure-induced amorphization was observed in hexagonal GdBO3 with a significant compression along the c-axis. Compared to the ions of the distorted GdBO3 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 YBO3/Eu3+ and GdBO3 are 329 and 321 GPa, respectively, which are more than 90% larger than that of EuBO3 (167 GPa) and are presumably attributed to Gd3+ and Y3+ with a high density of d valence electrons. (C) 2014 AIP Publishing LLC.
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