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

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13 Author(s)
Liu, S.H. ; Department of Physics, Tamkang University, Tamsui, Taiwan 251, Republic of China ; Tsai, H.M. ; Pao, C.W. ; Chiou, J.W.
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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 L3-edge XANES spectra consistently indicate an electron transfer from the Fe3O4 host into Ag granules. The Fe L3,2-edge XMCD spectra and hysteresis measurements reveal that Ag granules reduce the average magnetic moment of Fe ions and the saturation magnetization of Fe3O4.

Published in:

Applied Physics Letters  (Volume:89 ,  Issue: 9 )

Date of Publication:

Aug 2006

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