Dynamics of an Anisotropic Metaphosphate LiNaKCsPO3 Glass by Inelastic X‐Ray Scattering,Physica Status Solidi (B) - Basic Solid State Physics

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Dynamics of an Anisotropic Metaphosphate LiNaKCsPO3 Glass by Inelastic X‐Ray Scattering
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2020-06-26 , DOI: 10.1002/pssb.202000172
Shinya Hosokawa ₁ , Seiji Inaba ₂ , Hiroshi Uchiyama ₃ , Satoshi Tsutsui ₃

Affiliation

To clarify the mechanism of the entropic shrinkage of a metaphosphate LiNaKCsPO₃ glass, high‐resolution inelastic X‐ray scattering is carried out in the momentum transfer (Q) range from 1.6 to 15.9 nm⁻¹ by changing the stretched sample rod directions perpendicular and parallel to the X‐ray scattering plane. Phonon excitations are found only in a low Q range below about 3 nm⁻¹, and the so‐called Boson peaks are observed in the Q region beyond 5.6 nm⁻¹. These excitations exhibit mostly no differences in the rod direction. A spectral enhancement at the prepeak position in the total X‐ray scattering spectrum is due to the quasielastic contributions. The direction difference in the width of the quasielastic peak becomes largely broadened near the prepeak region, which may be owing to a low excitation energy of the phosphate chains across the chain direction.

中文翻译：

非弹性X射线散射各向异性偏磷酸盐LiNaKCsPO3玻璃的动力学

为了阐明偏磷酸盐LiNaKCsPO ₃玻璃的熵收缩机理，在1.6至15.9 nm ^-1的动量传递（Q）范围内，通过改变拉伸样品杆的垂直和垂直方向进行高分辨率的非弹性X射线散射。平行于X射线散射平面。仅在低于约3 nm ^-1的低Q范围内发现声子激发，并且在超过5.6 nm ^-1的Q区中观察到所谓的玻色子峰。。这些激励在杆方向上几乎没有差异。在总X射线散射光谱中，在峰前位置的光谱增强归因于准弹性贡献。准弹性峰的宽度方向差异在前峰区域附近变得大大加宽，这可能是由于磷酸盐链沿链链方向的激发能低所致。

更新日期：2020-06-26

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