教師資料查詢 | 類別: 期刊論文 | 教師: 錢凡之 CHIEN, FAN-Z (瀏覽個人網頁)

標題:Crystal and magnetic structures of A2YRU1-XcCuxO6 with A=Sr, Ba and x = 0.05 to 0.15
學年92
學期2
出版(發表)日期2004/04/01
作品名稱Crystal and magnetic structures of A2YRU1-XcCuxO6 with A=Sr, Ba and x = 0.05 to 0.15
作品名稱(其他語言)
著者錢凡之
單位淡江大學物理學系
出版者
著錄名稱、卷期、頁數Journal of Materials Chemistry 13, pp.1468-1474
摘要A series of mixed ruthenium–copper oxides of general formulae A2YRu1−xCuxO6 with A = Sr, Ba and x = 0.05 to 0.15 were prepared by high temperature synthesis. Electrical and magnetic measurements confirmed the samples were superconducting. Variable temperature neutron powder diffraction studies were undertaken to determine the crystal and magnetic structures of the materials in the temperature range 2–100 K. Both series are double perovskites with the Sr compounds adopting a distorted structure with space group P21/n and the Ba materials in the cubic space group Fm3m. The neutron diffraction patterns clearly show the development of extra peaks at temperatures ∼30–40 K indicative of long-range magnetic order. Refinements of the data indicate that the Ru5+ ions adopt a Type I magnetic structure for both series with a magnetic moment at 2 K of ∼2.4(1) μB in the ab plane. The magnetic moment is found to increase slightly with increased copper doping in the Sr series, whereas the Ba series has a higher magnetic ordering temperature due to higher symmetry of the crystal structure.
關鍵字
語言英文
ISSN1364-5501;0959-9428
期刊性質國外
收錄於
產學合作
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審稿制度
國別英國
公開徵稿
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