High-pressure x-ray diffraction study of YBO3/Eu3+, GdBO3, and EuBO3: Pressure-induced amorphization in GdBO3

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...

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Veröffentlicht in:Journal of applied physics 2014-01, Vol.115 (4)
Hauptverfasser: Wang, Pei, He, Duanwei, Xu, Chao, Ren, Xiangting, Lei, Li, Wang, Shanmin, Peng, Fang, Yan, Xiaozhi, Liu, Dongqiong, Wang, Qiming, Xiong, Lun, Liu, Jing
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Sprache:eng
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Zusammenfassung: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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4862653