Phason strain and structural perfection in the Zn–Mg–rare-earth icosahedral phases

Létoublon, Antoine; Fisher, I. R.; Sato, Taku; Boissieu, M. de; Boudard, Michel; Agliozzo, S.; Mancini, Lucia; Gastaldi, J.; Canfield, Paul C.; Goldman, A. I.; Tsai, A.‐P.

doi:10.1016/s0921-5093(00)01085-6

Cited by 11 publications

(6 citation statements)

References 15 publications

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“…However, for quasicrystals a relationship exists in the presence of a phason strain field between peak broadening and diffusion vector in perpendicular space q ? that allows to quantify the strength of the phason field [9][10][11][12]. Fig.…”

Section: X-ray Diffraction Characterizationmentioning

confidence: 99%

The oxidation at 500°C of AlCuFe quasicrystalline powders: A X-ray diffraction study

Weisbecker

Bonhomme

Bott

et al. 2005

Journal of Non-Crystalline Solids

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Section: X-ray Diffraction Characterizationmentioning

confidence: 99%

The oxidation at 500°C of AlCuFe quasicrystalline powders: A X-ray diffraction study

Weisbecker

Bonhomme

Bott

et al. 2005

Journal of Non-Crystalline Solids

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“…The bands parallel to the direction of growth often appear in the X-ray topograms of single quasicrystals [6,10]. This contrast is most often related to a slight deviation in the chemical composition of the areas of individual bands.…”

Section: Discussionmentioning

confidence: 99%

Study of Al‐Cu‐Co single quasicrystals by X‐ray topography

Bogdanowicz¹

2005

Cryst. Res. Technol.

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Al-Cu-Co single quasicrystals were studied by the reflective X-ray topography. It was found that on the surfaces of the single quasicrystals, which were parallel to (00001) decagonal plane, the contrast associated with screw dislocation occurs. In the topograms taken from other surfaces of the single quasicrystals the bands of contrast appear. This contrast comes from the antiphase domains and depends on the conditions of the single quasicrystals growth process.

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“…Such low values of g / ∈G pseudogaps seem to be physically acceptable taking into account that, in the Zn-Mg-R high-resolution diffraction patterns, the Bragg peaks with their intensity ratios below ∼10 −3 manifest themselves. 38 Finally we would like to point out that, due to a rather smooth spectral shape of the experimental Zn-Mg-R optical spectra, a determination of both intraband, and interband parameters, most probably, is not unambiguous. Previously we qualitatively explained the experimental Zn-Mg-R optical conductivity spectra, recorded in the narrower spectral range of 0.1-6 eV, by optical transitions across a single 311111 pseudogap.…”

Section: Analysis Of Zn-mg-r Optical Spectramentioning

confidence: 98%

Optical spectroscopy and electronic structure of the face-centered icosahedral quasicrystals Zn-Mg-R(R=Y, Ho, Er)

et al. 2013

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Results of optical spectroscopy studies of the face-centered icosahedral (fci) single-grain Zn-Mg-Y, Zn-Mg-Ho, and Zn-Mg-Er quasicrystals (QCs) are presented. The dielectric function of the QCs was measured in the 0.01-6 eV spectral range by IR-UV spectroscopic ellipsometry and far infrared reflection spectroscopy techniques. A theoretical scheme of optical conductivity calculations is extended to account for the Fermi level positions within and below a pseudogap. The model of the QC electron energy spectrum, based on a band structure hypothesis, is suggested, which treats the electronic subsystem as a nearly free electron gas affected by intersections of the Fermi surface with several families of Bragg planes. The experimental optical spectra are reproduced in detail by theoretical calculations carried out within the framework of the model. The parameters of the electron energy spectrum deduced from an analysis of optical data are close to those previously determined in an analysis of fci Zn-Mg-R valence band photoemission spectra.

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Phason strain and structural perfection in the Zn–Mg–rare-earth icosahedral phases

Cited by 11 publications

References 15 publications

The oxidation at 500°C of AlCuFe quasicrystalline powders: A X-ray diffraction study

The oxidation at 500°C of AlCuFe quasicrystalline powders: A X-ray diffraction study

Study of Al‐Cu‐Co single quasicrystals by X‐ray topography

Optical spectroscopy and electronic structure of the face-centered icosahedral quasicrystals Zn-Mg-R(R=Y, Ho, Er)

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