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

doi:10.1088/1674-1056/22/2/026101

中国物理B ›› 2013, Vol. 22 ›› Issue (2): 26101-026101.doi: 10.1088/1674-1056/22/2/026101

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

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

陈铁锌^a, 曹亮^a, 张旺^a, 韩玉岩^a, 郑志远^a, 徐法强^a, 奎热西^b, 钱海杰^b, 王嘉鸥^b

a National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China;
b Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2012-05-09 修回日期:2012-08-22 出版日期:2013-01-01 发布日期:2013-01-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10775126 and 10975138).

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

Chen Tie-Xin (陈铁锌)^a, Cao Liang (曹亮)^a, Zhang Wang (张旺)^a, Han Yu-Yan (韩玉岩)^a, Zheng Zhi-Yuan (郑志远)^a, Xu Fa-Qiang (徐法强)^a, Ibrahim Kurash (奎热西)^b, Qian Hai-Jie (钱海杰)^b, Wang Jia-Ou (王嘉鸥 )^b

a National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China;
b Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received:2012-05-09 Revised:2012-08-22 Online:2013-01-01 Published:2013-01-01
Contact: Xu Fa-Qiang E-mail:fqxu@ustc.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10775126 and 10975138).

摘要/Abstract

摘要： 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.

关键词: Fe-doped ZnO, laser molecular beam epitaxy, resonant photoemission spectroscopy, superparamagnetism

Abstract: 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.

Key words: Fe-doped ZnO, laser molecular beam epitaxy, resonant photoemission spectroscopy, superparamagnetism

中图分类号: (X-ray diffraction)

61.05.cp

68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 73.61.Ga (II-VI semiconductors) 75.50.Pp (Magnetic semiconductors)

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 . Detection of Fe 3d electronic states in valence band and magnetic properties of Fe-doped ZnO film[J]. 中国物理B, 2013, 22(2): 26101-026101.

Chen Tie-Xin (陈铁锌), Cao Liang (曹亮), Zhang Wang (张旺), Han Yu-Yan (韩玉岩), Zheng Zhi-Yuan (郑志远), Xu Fa-Qiang (徐法强), Ibrahim Kurash (奎热西), Qian Hai-Jie (钱海杰), Wang Jia-Ou (王嘉鸥 ). Detection of Fe 3d electronic states in valence band and magnetic properties of Fe-doped ZnO film[J]. Chin. Phys. B, 2013, 22(2): 26101-026101.

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

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

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