Local environment of fluorine atoms in Sr2Can ? 1CunO2n + δF2 ± y (n = 2, 3) high-temperature superconductors grown under high pressure期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Local environment of fluorine atoms in Sr₂Ca_{n ? 1}Cu_nO_{2n + δ}F_{2 ± y} (n = 2, 3) high-temperature superconductors grown under high pressure

Authors:	E. Z. Kurmaev A. Moewes R. Wilks L. D. Nechkina D. A. Zatsepin T. Kawashima E. Takayama-Muromachi

Affiliation:	(1) Institute of Metal Physics, Ural Division, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Yekaterinburg, 620219, Russia;(2) Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, S7N 5E2, Canada;(3) National Institute for Materials Science, Tsukuba 305-0044, Japan

Abstract:	The local environment of fluorine atoms in Sr₂Ca_{n − 1}Cu_nO_{2n + δ}F_{2 ± y} (n = 2, 3) high-temperature superconductors (T _c = 99 and 111 K) is studied using soft x-ray emission and absorption spectroscopy. The fluorine spectra of the samples studied are found to be similar to those of SrF2, which supports the conjecture that fluorine atoms substitute for apex oxygen atoms and form double SrF layers. __________ Translated from Fizika Tverdogo Tela, Vol. 47, No. 7, 2005, pp. 1170–1174. Original Russian Text Copyright ? 2005 by Kurmaev, Moewes, Wilks, Nechkina, Zatsepin, Kawashima, Takayama-Muromachi.

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