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X-ray absorption and emission spectroscopic investigation of Mn doped ZnO films |
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| Authors: | J Jin GS ChangYX Zhou XY ZhangDW Boukhvalov EZ KurmaevA Moewes |
| Institution: | a School of Material Science and Engineering, Shanghai University, 149 Yanchang Road, Shanghai 200072, China b Department of Physics, Surface Physics Laboratory (National Key Laboratory) and Synchrotron Radiation Research Center of Fudan University, 220 Handan Road, Shanghai 200433, China c Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2, Canada d Institute of Metal Physics, Russian Academy of Sciences-Ural Division, Yekaterinburg 620041, Russia e Computational Materials Science Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Abstract: | The electronic structure of (Zn,Mn)O films with different Mn concentrations has been investigated by element-selective soft X-ray absorption and emission spectroscopy. The band gap narrowing of (Zn,Mn)O with increase of Mn concentration (<20% Mn) is attributed to the Mn doping and sp-d exchange interactions. According to analysis of the O Kα and resonant Mn L2,3 X-ray emission spectra, the splitting of Mn 3d subbands is related to Mn-derived states. It indicates that ferromagnetic coupling in (Zn,Mn)O can be taken into account to be carrier-induced. The presence of antiferromagnetism in the heavier Mn-doped films can be explained in terms of the existence of MnO secondary phases. |
| Keywords: | (Zn Mn)O sp-d exchange interactions X-ray spectroscopy |
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