Electronic and magnetic properties of the Ag-doped Fe3O4 films studied by x-ray absorption spectroscopy

被引：19
作者：
Liu, S. H.
Tsai, H. M.
Pao, C. W.
Chiou, J. W.
Ling, D. C.
Pong, W. F. [1 ]
Tsai, M. -H.
Lin, H. J.
Jang, L. Y.
Lee, J. F.
Hsu, J. H.
Wang, W. J.
Hsu, C. J.
机构：
[1] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan
[2] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan
[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan
[4] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan
[5] Tamkang Univ, Dept Chem, Tamsui 251, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 09期
关键词：
D O I：
10.1063/1.2338889
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The electronic and magnetic properties of Ag-doped Fe3O4 films were studied by x-ray absorption near-edge structure (XANES), extended x-ray absorption fine structure (EXAFS), and x-ray magnetic circular dichroism (XMCD) measurements. A comparison between the Ag K-edge EXAFS Fourier transform spectra of Ag-doped Fe3O4 and the Ag metal shows that Ag atoms aggregate into Ag granules. The O K-edge and Ag L-3-edge XANES spectra consistently indicate an electron transfer from the Fe3O4 host into Ag granules. The Fe L-3,L-2-edge XMCD spectra and hysteresis measurements reveal that Ag granules reduce the average magnetic moment of Fe ions and the saturation magnetization of Fe3O4. (c) 2006 American Institute of Physics.
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页数：3
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