Detection of Fe 3d electronic states in the valence band and magnetic properties of Fe-doped ZnO film

Fe-doped ZnO film has been grown by laser molecular beam epitaxy（L-MBE） and structurally characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）,all of which reveal the high quality of the film.No secondary phase was detected.Resonant photoemission spectroscopy（RPES） with photo...

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Published inChinese physics B Vol. 22; no. 2; pp. 352 - 356
Main Author 陈铁锌 曹亮 张旺 韩玉岩 郑志远 徐法强 奎热西 钱海杰 王嘉鸥
Format Journal Article
LanguageEnglish
Published 01.02.2013
Subjects
Electron states
Fermi level
Fermi surfaces
Photons
Scanning electron microscopy
Three dimensional
Valence band
Zinc oxide
ZnO薄膜
价带
掺杂
检测
电子态
磁学性质
铁相
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/2/026101

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Summary:Fe-doped ZnO film has been grown by laser molecular beam epitaxy（L-MBE） and structurally characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）,all of which reveal the high quality of the film.No secondary phase was detected.Resonant photoemission spectroscopy（RPES） with photon energies around the Fe 2p-3d absorption edge is performed to detect the electronic structure in the valence band.A strong resonant effect at a photon energy of 710 eV is observed.Fe3＋ is the only valence state of Fe ions in the film and the Fe 3d electronic states are concentrated at binding energies of about 3.8 eV and 7 eV～8 eV.There are no electronic states related to Fe near the Fermi level.Magnetic measurements reveal a typical superparamagnetic property at room temperature.The absence of electronic states related to Fe near the Fermi level and the high quality of the film,with few defects,provide little support to ferromagnetism.
Bibliography:Fe-doped ZnO film has been grown by laser molecular beam epitaxy（L-MBE） and structurally characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）,all of which reveal the high quality of the film.No secondary phase was detected.Resonant photoemission spectroscopy（RPES） with photon energies around the Fe 2p-3d absorption edge is performed to detect the electronic structure in the valence band.A strong resonant effect at a photon energy of 710 eV is observed.Fe3＋ is the only valence state of Fe ions in the film and the Fe 3d electronic states are concentrated at binding energies of about 3.8 eV and 7 eV～8 eV.There are no electronic states related to Fe near the Fermi level.Magnetic measurements reveal a typical superparamagnetic property at room temperature.The absence of electronic states related to Fe near the Fermi level and the high quality of the film,with few defects,provide little support to ferromagnetism.
Chen Tie-Xin, Cao Liang , Zhang Wang , Han Yu-Yan , Zheng Zhi-Yuan , Xu Fa-Qiang , Ibrahim Kurash , Qian Hai-Jie , Wang Jia-Ou（ 1）National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China ;2） Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Fe-doped ZnO,laser molecular beam epitaxy,resonant photoemission spectroscopy,superparamagnetism
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/2/026101