Structural behaviour of YGa under high pressure

M. Sekar, N. Shekar, P. Sahu, R. Babu
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Abstract

High pressure X-ray diffraction studies on rare-earth gallide YGa was carried up to a pressure of ∼ 33 GPa using rotating anode x-ray source in an angle dispersive mode. YGa exhibits CrB (B33) type orthorhombic structure (space group Cmcm) at ambient pressure. It undergoes a reversible structural phase transition from orthorhombic to tetragonal structure at ∼ 8.8 GPa. Both the phases coexist up to the highest pressure studied. The zero pressure bulk modulus and its derivative for parent phase have been estimated to be Bo = 60 ± 3 GPa, Bo' = 4.6 ± 1.5.
高压下YGa的结构特性
利用旋转阳极x射线源在角度色散模式下对稀土镓YGa进行了高压x射线衍射研究,压力高达~ 33 GPa。YGa在环境压力下呈现CrB (B33)型正交结构(空间群Cmcm)。在~ 8.8 GPa下,它经历了从正交结构到四方结构的可逆结构相变。在研究的最高压力下,两相共存。母相的零压体积模量及其导数为Bo = 60±3gpa, Bo′= 4.6±1.5。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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