Effect of Ni-doping concentration on structural, optical and magnetic properties of CdSe nanorods

被引：0

作者：

Singh, Jaspal ^{[1
]}

Kumar, Sanjeev ^{[2
]}

Verma, N.K. ^{[1
]}

机构：

[1] Nano Research Lab, School of Physics and Materials Science, Thapar University, Patiala 147004, India

[2] Department of Applied Sciences, PEC University of Technology, Chandigarh 160012, India

来源：

Materials Science in Semiconductor Processing | 2014年 / 26卷 / 01期

关键词：

High resolution transmission electron microscopy - II-VI semiconductors - Nanorods - Zinc sulfide - Cadmium compounds - Energy gap - Selenium compounds - Nickel - Saturation magnetization - Nickel compounds - X ray diffraction - Carrier concentration;

D O I：

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摘要：

Cd1-xNixSe (x=0.00, 0.05, 0.10 and 0.15) nanorods have been synthesized using solvothermal route. X-ray diffraction (XRD) studies show that the nanorods possess wurtzite phase having hexagonal structure. Transmission electron microscopy (TEM) reveals the formation of nanorods having lengths 150-200 nm and diameters 10-15 nm. This has been further confirmed by high-resolution transmission electron microscopy (HRTEM) wherein lattice fringes corresponding to CdSe have been well observed. Reflectance measurements illustrate the red-shift in band gap with increase of Ni-doping concentration. Raman spectra display the shifting of longitudinal optical (LO) phonon modes, and modes activation due to doping in CdSe nanorods. Magnetic hysteresis (M-H) loops at room temperature reveal the ferromagnetism in nanorods. The saturation magnetization values have been observed to increase upto 10% due to carrier mediated exchange interactions, whereas a decrease has been observed for 15% Ni-doping concentration due to super-exchange interactions. © 2014 Elsevier Ltd.

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