Atomic distribution and electronic transport properties in liquid alloys studied by X-ray diffraction
Atomic distribution and electronic transport properties in liquid alloys studied by X-ray diffraction
复制标题
通过 X 射线衍射研究液态合金中的原子分布和电子传输特性
DOI：
10.1080/00018736700101355
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发表时间：
1967
影响因子：
--
通讯作者：
N. Halder
中科院分区：
文献类型：
--
作者：
C. Wagner;N. Halder
摘要通过测量干涉函数I(K)的傅里叶变换，得到了液态合金中原子的分布。由此得到的密度函数ρ(r)是原子密度ρ ij (r)的加权和，它指定在距离i型原子的距离r处每单位体积的j型原子的数量。权重因子不仅与原子浓度ci有关，还与原子散射因子fi有关。在二元合金中，需要三个径向密度函数来确定原子分布。一般来说，必须确定三个干涉函数I a(K)、I b(K)和I ab(K)才能得到这些密度。电子输运性质取决于这三个干涉函数和原子赝势的傅里叶变换U a(K)和U b(K)。电子单位中每个原子的相干散射强度I e.u. coh(K)可以表示为：当f a≃f b时，Laue单调散射ca c b(f a-f b)2将变小，并且这种关系可以被描述为：
Abstract The distribution of atoms in liquid alloys is obtained by Fourier transform of the measured interference function I(K). The density function ρ(r), thus obtained, is the weighted sum of the atomic densities ρ ij (r) which specify the number of j-type atoms per unit volume at the distance r from the i-type atom. The weighting factors depend not only on the atomic concentration ci but also on the atomic scattering factors fi of the atoms. In binary alloys three radial density functions are needed to determine the atomic distribution. In general, three interference functions I a(K), I b(K) and I ab(K) must be determined to obtain these densities. The electronic transport properties depend on these three interference functions and on the Fourier transform U a(K) and U b(K) of the pseudopotentials of the atoms. The coherently scattered intensity I e.u. coh(K) per atom in electron units can be written as: If f a≃f b, the Laue monotonic scattering c a c b(f a-f b)2 will be small and This relation can be ...