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.

引用

页数：3

共 20 条

[1] Electronic structure and x-ray magnetic circular dichroism in Fe3O4 and Mn-, Co-, or Ni-substituted Fe3O4 -: art. no. 024417 [J].