https://scholars.lib.ntu.edu.tw/handle/123456789/61172
標題: | Co Valence by K-Edge X-ray Absorption Spectroscopy, Magnetic Properties, and Structure of Polycrystalline Bulk Zn1 xCoxO | 作者: | Peleckis, G. Wang, X.L. Liu, R.S. Dou, S.X. |
關鍵字: | Paramagnetic materials;spintronics | 公開日期: | 十月-2005 | 出版社: | Taipei:National Taiwan University Dept Chem Engn | 起(迄)頁: | 2727-2729 | 來源出版物: | IEEE TRANSACTIONS ON MAGNETICS 41(10) | 摘要: | We report on magnetic properties and a Co K-edge X-ray absorption spectroscopy (XAS) study of polycrystalline bulk Zn1 Co O ( = 0 10 0 15 0 17) samples. All samples show paramagnetic behavior and no ferromagnetism was observed. XAS results showed that for all samples the valence of Co is 2+. Spin state assessment derived from Currie–Weiss fitting indicated a possible spin state transition from Co2+ high spin to Co2+ low spin. Calculated e values for samples with = 0 10 and 0 15 indicated an orbital contribution to the effective magnetic moment of the Co ion. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/200611150121266 | 其他識別: | 246246/200611150121266 |
顯示於: | 化學工程學系 |
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