Structural, elemental, optical and magnetic study of Fe doped ZnO and impurity phase formation

作     者：S.Karamat R.S.Rawat P.Lee T.L.Tan R.V.Ramanujan 

作者机构：Natural Science and Science Education National Institute of Education Nanyang Technological University COMSATS Institute of Information Technology Department of Physics Middle East Technical University School of Material Science and Engineering Nanyang Technological University Nanyang Avenue 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2014年第24卷第2期

页      面：142-149页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：the National Institute of Education/ Nanyang Technological University, Singapore, for providing AcRF Grant RI 17/03/RSR NIE/NTU for providing the research scholarship 

主　　题：Fe doped ZnO Dilute magnetic semiconductor Rietveld refinements X-ray spectroscopy Band gap Magnetic moment 

摘      要：We have prepared a series of(ZnO)1-x(Fe2O3)x≤0.10bulk samples with various concentrations of Fe dopant by ball milling and investigated their structural, compositional, optical and magnetic properties by means of X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS),Raman spectrometer and vibrating sample magnetometer(VSM), respectively. Information about different impurity phases was obtained through Rietveld refinements of XRD data analysis. XPS results showed different valence states(Fe2+ tand Fe3+) supported by shaking satellite peaks in samples. With increasing Fe doping percentage, the crystal quality deteriorated and a shift of E2 low band(characteristic of ZnO) has been observed in Raman spectra. Energy band gap estimated from reflectance UV–vis spectroscopy showed shift for all bulk samples. The magnetic behavior was examined using a vibrating sample magnetometer(VSM), indicating ferromagnetic behavior at room temperature(300 K). The effective magnetic moment per Fe atom decreases with increase in doping percentage which indicates that ferromagnetic behavior arises from the substitution of Fe ions in the ZnO lattice.