Order-Disorder Phase Transitions in Quasicrystals

Autor:	Yoshie Matsuo, Yasushi Ishii, Hiroshi Abe
Rok vydání:	2004
Předmět:	Condensed Matter::Materials Science Phase transition Order (biology) Diffuse scattering Materials science Condensed matter physics Scattering Quasicrystal Context (language use) Phason Anisotropy
Zdroj:	Nihon Kessho Gakkaishi. 46:65-72
ISSN:	1884-5576 0369-4585
DOI:	10.5940/jcrsj.46.65
Popis:	We have reviewed recent studies on atomic short-range order (SRO) in Al-Ni-Co decagonal quasicrystals by anomalous X-ray scattering. Anisotropic distributions of diffuse scattering around Bragg reflections are analyzed in context of phasonic diffuse scattering. Phason strains also cause peak broadening of Bragg reflections. Both chemical and topological distortions are responsible for the order-disorder phase transitions. In addition, a decrease of the Bragg intensity at high temperatures and the anomalous Debye-Waller factor are explained as consequences of the phason flip.
Databáze:	OpenAIRE
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