教師資料查詢 | 類別: 期刊論文 | 教師: 張經霖 CHANG, HENRY CHING-LIN (瀏覽個人網頁)

標題:X-ray absorption spectroscopy studies of Fe-doped misfit-layered Ca3Co4-xFexO9+δ (x = 0, 0.05, 0.1, and 0.15)
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出版(發表)日期2007/07/01
作品名稱X-ray absorption spectroscopy studies of Fe-doped misfit-layered Ca3Co4-xFexO9+δ (x = 0, 0.05, 0.1, and 0.15)
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著者張經霖; Chang, C. L.; Liu, Chia-jyi; Chen, Jeng-lung; Huang, Li-chen; Lin, Zhi-ru; Chang, Ching-lin
單位淡江大學物理學系
出版者American Institute of Physics (AIP)
著錄名稱、卷期、頁數Journal of Applied Physics 102(1), pp.014908
摘要We have carried out O K- and Co L2,3-edge x-ray absorption studies on misfit-layered oxides of
polycrystalline Ca3Co4−xFexO9+ x= 0, 0.05, 0.1, 0.15. The analyses of integrated absorption
intensity show that the number of Co 3d unoccupied states decreases upon partial substitution of Fe
for Co, which correlates well the variation trend of the room-temperature resistivity with x.
Nevertheless, the number of O 2p unoccupied states increases with x. Both Hall and thermopower
measurements indicate that the majority carrier is of hole type for Ca3Co4−xFexO9+. Therefore, the
decrease of O 2p occupancy should be responsible for the increase of the hole carrier concentration
upon partial substitution of Fe for Co.
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語言英文
ISSN0021-8979
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