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Anisotropic phonon density of states: the application of Rietveld and Mössbauer texture analysis in aligned powders.

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Title: Anisotropic phonon density of states: the application of Rietveld and Mössbauer texture analysis in aligned powders.
Authors: Rykov, A. I.1,2,3 rykov@woody.ocn.ne.jp, Seto, M.4, Ueda, Y.5, Nomura, K.2
Source: Journal of Applied Crystallography. Jun2009, Vol. 42 Issue 3, p496-501. 6p. 5 Graphs.
Subjects: Anisotropy, Phonons, Rietveld refinement, Crystals, Polycrystals, Neutrons
Abstract: Since it is not always feasible to synthesize single crystals of novel materials, the orientation of layered polycrystals has become an attractive basis for studying the angular dependence of inelastic scattering of X-rays or neutrons. Utilizing Rietveld analysis, the anisotropic properties of layered structures in novel manganites and cuprates have been studied with oriented powders instead of single crystals. The phonon density of states (DOS) and atomic thermal displacement are anisotropic in the A-site-ordered manganites LnBaMn2Oy for the series y = 5 and v = 6 (Ln = Y, La, Sm and Gd). This article establishes the angular dependence of the DOS on texture of arbitrary strength, links the textures observed by X-ray and γ-ray techniques, and solves the problem of disentanglement of the Goldanskii-Karyagin effect and texture in Mössbauer spectra. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Applied Crystallography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 42858019
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  Data: <searchLink fieldCode="DE" term="%22Anisotropy%22">Anisotropy</searchLink><br /><searchLink fieldCode="DE" term="%22Phonons%22">Phonons</searchLink><br /><searchLink fieldCode="DE" term="%22Rietveld+refinement%22">Rietveld refinement</searchLink><br /><searchLink fieldCode="DE" term="%22Crystals%22">Crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Polycrystals%22">Polycrystals</searchLink><br /><searchLink fieldCode="DE" term="%22Neutrons%22">Neutrons</searchLink>
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  Data: Since it is not always feasible to synthesize single crystals of novel materials, the orientation of layered polycrystals has become an attractive basis for studying the angular dependence of inelastic scattering of X-rays or neutrons. Utilizing Rietveld analysis, the anisotropic properties of layered structures in novel manganites and cuprates have been studied with oriented powders instead of single crystals. The phonon density of states (DOS) and atomic thermal displacement are anisotropic in the A-site-ordered manganites LnBaMn2Oy for the series y = 5 and v = 6 (Ln = Y, La, Sm and Gd). This article establishes the angular dependence of the DOS on texture of arbitrary strength, links the textures observed by X-ray and γ-ray techniques, and solves the problem of disentanglement of the Goldanskii-Karyagin effect and texture in Mössbauer spectra. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Applied Crystallography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1107/S0021889809010747
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 496
    Subjects:
      – SubjectFull: Anisotropy
        Type: general
      – SubjectFull: Phonons
        Type: general
      – SubjectFull: Rietveld refinement
        Type: general
      – SubjectFull: Crystals
        Type: general
      – SubjectFull: Polycrystals
        Type: general
      – SubjectFull: Neutrons
        Type: general
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      – TitleFull: Anisotropic phonon density of states: the application of Rietveld and Mössbauer texture analysis in aligned powders.
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            NameFull: Seto, M.
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            NameFull: Ueda, Y.
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            NameFull: Nomura, K.
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            – D: 01
              M: 06
              Text: Jun2009
              Type: published
              Y: 2009
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