Structural instability and thermal history effects in oxygen-reduced superconducting ceramic YBa2(Cu0.983Fe0.017)3O6.8

Autor:	V. M. Cherepanov, Ch. Sauer, M. A. Chuev, E. Yu. Tsymbal, V.V. Zhurov, W. Zinn, S.A. Ivanov
Rok vydání:	1995
Předmět:	Superconductivity Phase transition Mössbauer effect Condensed matter physics Chemistry General Chemistry Condensed Matter Physics Heat capacity Magnetic susceptibility visual_art Materials Chemistry visual_art.visual_art_medium Cuprate Ceramic Phase diagram
Zdroj:	Solid State Communications. 93:921-926
ISSN:	0038-1098
DOI:	10.1016/0038-1098(94)00770-5
Popis:	The temperature dependencies of the Mossbauer parameters for 57Fe-doped YBa2Cu3Oy (y ≈ 6.80, Tc ≈ 80 K) reveal anomalies near 90, 170, 230 and 280 K. These anomalies were confirmed with X-ray diffraction and heat capacity measurements using the same samples. The thermal history of the sample was found to influence the superconducting characteristics and the temperature behavior of the Mossbauer effect probability and linewidth. The results are discussed on the basis of the calculated low temperature phase diagram and possible ferro- and antiferroelectric phase transitions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c5f4bd703f1f8a7643738b04d32d0844 https://doi.org/10.1016/0038-1098(94)00770-5 Zobrazit plný text záznamu Full Text from ScienceDirect