| 1 | Enhanced room temperature ferromagnetism in Cr-doped ZnO nanoparticles prepared by auto-combustion method显示文摘Zn_(1-x)Cr_xO(x=0.00,0.01,0.03,0.05,0.07,and 0.09)nanoparticles were synthesized,by an auto-combustion method.Structural,optical,and magnetic characteristics of Cr-doped Zn O samples calcined at 600°C have been analyzed by using X-ray diffraction(XRD),field emission scanning electron microscope(FESEM),UV–Vis spectroscopy and vibrating sample magnetometer(VSM).The XRD data confirmed the hexagonal wurtzite structure of pure and Cr-doped Zn O nanoparticles.The calculated values of grain size using Scherrer's formula are in the range of 30.7–9.2 nm.The morphology of nanopowders has been observed by FESEM,and EDS results confirmed a systematic increase of Cr content in the samples and clearly indicate with no impurity element.The band gaps,computed by UV–Vis spectroscopy,are in the range of 2.83–2.35 e V for different doping concentrations.By analyzing VSM data,significantly enhanced room temperature ferromagnetism is identified in Cr-doped Zn O samples.The value of magnetization is a 12 times increased of the value reported by Daun et al.(2010).Room temperature ferromagnetism of the nanoparticles is of vital prominence for spintronics applications. | Khizar-ul Haq M.Irfan Muhammad Masood Murtaza Saleem Tahir Iqbal Ishaq Ahmad M.A.Khan M.Zaffar Muhammad Irfan | 2018 | Journal of Semiconductors2018，39，4： | 0 |
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