Investigation of the phase separations and the local electronic structures of Zn1-xTxO, (T= Mn, Fe, Co) magnetic semiconductors using synchrotron radiation
SCIE
SCOPUS
- Title
- Investigation of the phase separations and the local electronic structures of Zn1-xTxO, (T= Mn, Fe, Co) magnetic semiconductors using synchrotron radiation
- Authors
- Lee, SS; Kim, G; Wi, SC; Kang, JS; Han, SW; Lee, YK; An, KS; Kwon, SJ; Jung, MH; Shin, HJ
- Date Issued
- 2006-04-15
- Publisher
- AMER INST PHYSICS
- Abstract
- The spatial chemical distributions of doped T ions and their local electronic structures in Zn1-xTxO (T=Mn, Fe, Co; x <= 0.1) have been investigated simultaneously by using scanning photoelectron microscopy (SPEM), photoemission spectroscopy (PES), and soft-x-ray absorption spectroscopy (XAS). The measured SPEM images for Zn1-xTxO single crystals reveal the uniform chemical distributions of T ions, indicating the homogeneous substitution of T ions for Zn sites. The T 2p XAS spectra of Zn1-xTxO show that Mn and Co ions are in the divalent states, while Fe ions are in the Fe2+-Fe3+ mixed-valent states. The valence-band PES study of Zn1-xTxO (T=Mn, Fe, Co) shows that T 3d states lie near the top of the O 2p valence bands. Only ferromagnetic Zn1-xTxO shows a significantly large Fe 3d photoemission intensity near E-F, in contrast to the negligible Mn and Co 3d photoemission intensities near E-F in nonferromagnetic Zn1-xTxO (T=Mn, Co), suggesting that the high carrier density is important in determining the ferromagnetic behavior of Zn1-xTxO. (C) 2006 American Institute of Physics.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10574
- DOI
- 10.1063/1.2163868
- ISSN
- 0021-8979
- Article Type
- Article
- Citation
- JOURNAL OF APPLIED PHYSICS, vol. 99, no. 8, 2006-04-15
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