Diffuse scattering in quaternary single crystals in the system Zr-Y-O-N

Autor:	Hans Boysen, D. Hohlwein, Martin Lerch, R. Schneider, Friedrich Frey, I. Kaiser
Rok vydání:	2000
Předmět:	Inorganic Chemistry Crystallography Diffuse scattering Chemistry Lattice (order) Neutron diffraction Diagonal Short range order General Materials Science Neutron scattering Condensed Matter Physics Quaternary Molecular physics
Zdroj:	Zeitschrift für Kristallographie - Crystalline Materials. 215:437-440
ISSN:	2196-7105 2194-4946
DOI:	10.1524/zkri.2000.215.8.437
Popis:	The diffuse scattering of two single crystals in the quaternary system Zr-Y-O-N (Y0.04Zr0.96O1.64N0.223 and Y0.17Zr0.83O1.68N0.158) has been measured by neutron scattering in different layers of the [1-10] zone to study short range order originating from the vacancies. While trying to fit the diffuse scattering with models given in the literature remarkable discrepancies occurred. In contrast to the existing models which explain the diffuse scattering by correlated clusters of ordered vacancies, a new model is proposed based on longitudinal displacements of rigid (O-)Zr-O-units within the lattice where the distance between Zr and O (¼ of the cubic body diagonal) is kept fixed.
Databáze:	OpenAIRE
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