Electron microscopy and electron diffraction study of ordering in Ni4W

Tendeloo, G.; Mishra, N. S.; Suryanarayana, C.

doi:10.1007/bf00553131

Cited by 1 publication

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“…The interpretation of those patterns was mainly based on a real-space description with h100iand h1 1 2 0i-type concentration waves with no specific reference to the underlying electronic structure. Concentration waves of this type are related to ordering in, for example, L1 2 , D0 22 or D1 a structures (Tendeloo, 1976). On the other hand, characteristic features of the electronic structure and in particular the Fermi surface of metallic systems have been related to ordering phenomena and diffuse scattering for a long time (Moss, 1969;de Fontaine, 1979;Reichert et al, 1996).…”

Section: Experimental Findingsmentioning

confidence: 99%

An accidental visualization of the Brillouin zone in an Ni–W alloyviadiffuse scattering

et al. 2013

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Solid state physics is built on the concept of reciprocal space. The physics of any given periodic crystal is fully defined within the Wigner–Seitz cell in reciprocal space, also known as the first Brillouin zone. It is a purely symmetry‐based concept and usually does not have any eye‐catching signature in the experimental data, in contrast with some other geometrical constructions like the Fermi surface. However, the particular shape of the Fermi surface of nickel allowed the visualization of the system of edges (skeleton) of the Wigner–Seitz cell of the face‐centred cubic lattice in reciprocal space in three dimensions by the diffuse scattering of X‐rays from Ni1−xWx (x = 0.03, 0.05, 0.08) single crystals. Employing a cluster‐expansion method with first‐principles input, it is possible to show that the observed scattering is inherent to the given nickel alloys and the crystal structures they form. This peculiar feature can be understood by considering the shape of the Fermi surface of pure nickel.

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Section: Experimental Findingsmentioning

confidence: 99%