Local modes in dilute metal-hydrogen alloys.
Local modes in dilute metal-hydrogen alloys.
复制标题
稀金属氢合金中的局部模式。
DOI：
10.1103/physrevb.33.2093
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Rowe
中科院分区：
文献类型：
--
作者：
Magerl;Rush;Rowe
我们报告了过渡金属V、Nb和Ta中H的局部模式的测量，特别强调了低浓度合金。在中子散射谱中，即使在<1 at的水平上，激发也表现为非常宽的峰。% H，与这种间隙缺陷通常期望的窄态密度峰相反。在NbH/sub 0.0055/中较低的振动峰显示，在…在295和210 K之间的相位，从106到118 meV的意外连续转换。讨论和评估了几种解释这些不寻常观测结果的可能机制。
We report on measurements of the local modes of H in the transition metals V, Nb, and Ta with particular emphasis on low-concentration alloys. The excitations appear as very broad peaks in the neutron scattering spectrum even at a level of <1 at. % H, in contrast to the narrow density-of-states peaks normally expected for such interstitial defects. The lower vibration peak in NbH/sub 0.0055/ reveals, within the ..cap alpha.. phase between 295 and 210 K, an unexpected continuous shift from 106 to 118 meV. Several possible mechanisms to explain these unusual observations are discussed and evaluated.