Autor:	F. Del Giallo, F. Lucchi, L. Cianchi, Gabriele Spina
Rok vydání:	2001
Předmět:	Diffraction Superconductivity Nuclear and High Energy Physics Condensed matter physics Chemistry Anharmonicity Condensed Matter Physics Atomic and Molecular Physics and Optics Ion Magnetic field Distribution function Lamb–Mössbauer factor Physical and Theoretical Chemistry Anisotropy
Zdroj:	Hyperfine Interactions. 136:105-123
ISSN:	0304-3843
DOI:	10.1023/a:1015556430015
Popis:	The lattice dynamics of high-Tc EuBCO superconductor was studied by means of Mossbauer spectroscopy of the 151Eu ion in samples with oriented grains. Three samples were prepared: one oriented by means of 8 T magnetic field, another by means pressure; the third was left random. The orientation distribution function was determined be means of X-ray diffraction. By comparison of the absorption areas of the oriented samples with respect to the random one, the Lamb–Mossbauer factor ratio corresponding to the motions in c-direction and ab-plane was determined. This ratio turned out to be independent of the temperature and of value 0.25±0.05. This very small value can be explained only if a strong anharmonicity is present, which mainly concerns the c-direction motion.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3982715a8dfb4c97e3be3efeddb01dd3 https://doi.org/10.1023/a:1015556430015 Zobrazit plný text záznamu Full text from SpringerLink