X-ray multi-beam resonant diffraction analysis of crystal symmetry for layered perovskite YBaCuFeO5

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/109589

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题名:	X-ray multi-beam resonant diffraction analysis of crystal symmetry for layered perovskite YBaCuFeO5
作者:	Wen-Chung Liu;Yu-Zhan Zheng;Yu-Chieh Chih;Yen-Chung Lai;Yi-Wei Tsai;Yan-Zong Zheng;Chao-Hung Du;Fang-Cheng Chou;Yun-Liang Soo;Shih-Lin Chang
关键词:	X-ray multiple diffraction;diffraction anomalous fine structure;DAFS;dynamical X-ray diffraction theory;crystal symmetry;YBaCuFeO5
日期:	2016-09-30
上传时间:	2017-02-24 02:11:59 (UTC+8)
出版者:	Wiley-Blackwell Publishing Ltd.
摘要:	The open question of crystal symmetry for YBaCuFeO5, still under debate, is resolved by using diffraction anomalous fine structure and resonant multi-beam X-ray diffraction at the Fe and Cu K edges. The different asymmetric intensity distributions observed at 7, 7.1305 and 8.9945 keV give direct evidence that the space group of YBaCuFeO5 should be P4/mmm with the distance between Cu and apical O atoms longer than that between Fe and O atoms. This approach provides a direct way to resolve detailed structural symmetry which is indeterminate in conventional Bragg diffraction.
關聯:	Journal of Applied Crystallography 49, p.1721-1725
DOI:	10.1107/S1600576716013248
显示于类别:	[物理學系暨研究所] 期刊論文

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