X-ray Absorption Spectroscopy Study of Cr Doped Fe3O4 Thin Films

• Main Authors: Jen-Chieh Shen, 沈仁傑
• Other Authors: Ching-Lin Chang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/68812427918388470210

碩士 === 淡江大學 === 物理學系碩士班 === 96 === We report the x-ray absorption near edge structure (XANES) study on a series of Fe-Cr-O mixed oxide thin films with nominal composition Fe1-xCrxOy (x = 0.1 ~ 0.9). Fe and Cr L2,3-edge results indicate that Cr substitute Fe3+ at B-site preferentially for x ≦ 0.3. For x > 0.3 the spectral shape changes drastically indicating a possible structural change. Fe and Cr K-edge results indicate that the average valence of Fe and Cr are not changed for x ≦ 0.3. For x > 0.3, the average valence of both Fe and Cr increases systematically.