Microstructure, optical, dielectric and electrical characterizations of Mn doped ZnO nanocrystals synthesized by mechanical alloying

2018 ◽  
Vol 44 (6) ◽  
pp. 7110-7121 ◽  
Author(s):  
Arup Dhara ◽  
Sumanta Sain ◽  
Sachindranath Das ◽  
Swapan Kumar Pradhan
Keyword(s):  
Mechanical Alloying ◽  
Zno Nanocrystals ◽  
Optical Dielectric ◽  
Doped Zno ◽  
Electrical Characterizations ◽  
Mn Doped

scholarly journals Oriented Attachment Is a Major Control Mechanism To Form Nail-like Mn-Doped ZnO Nanocrystals

Langmuir ◽  
2017 ◽  
Vol 33 (51) ◽  
pp. 14709-14717 ◽  
Author(s):  
Samuel Patterson ◽  
Priyanka Arora ◽  
Paige Price ◽  
Jasper W. Dittmar ◽  
Vijay Kumar Das ◽  
...  
Keyword(s):  
Control Mechanism ◽  
Oriented Attachment ◽  
Zno Nanocrystals ◽  
Doped Zno ◽  
Mn Doped

Influence of Mn Doping on Structural and Vibrational Properties of Self-Assembled Mn Doped ZnO Nanocrystals

2008 ◽  
Vol 8 (8) ◽  
pp. 4263-4267 ◽  
Author(s):  
K. C. Barick ◽  
D. Bahadur
Keyword(s):  
Lattice Site ◽  
Mass Force ◽  
X Ray Diffraction ◽  
Infrared Band ◽  
Zno Nanocrystals ◽  
Diffraction Peaks ◽  
Doped Zno ◽  
Surface Phonon Mode ◽  
Mn Concentration ◽  
Mn Doped

Nanocrystallites (15–25 nm) of Mn doped ZnO prepared by refluxing their acetate precursors in the presence of diethylene glycol, self-assemble into polydisperse spheres of broad size distributation (100–400 nm). The center of X-ray diffraction peaks shifts towards lower angle and the line gets broadened on increasing Mn concentration. Compared to the vibration modes of wurtzite ZnO, one additional vibration mode is observed in the range of 522–518 cm−1 in Raman spectra of Mn doped ZnO whose intensity increases on increasing the Mn concentration. The origin of this peak could be related to the incorporation of Mn2+ in Zn2+ lattice site. Further, on increasing Mn concentration, infrared band red shifted and surface phonon mode absorption get pronounced due to the incorporation of Mn2+ in Zn2+ lattice site resulting changes in the local structure parameters (effective mass, force constant, bond length).

Effect of PEG on Structural and Magnetic Properties of Mn Doped ZnO Nanocrystals

2013 ◽  
Vol 678 ◽  
pp. 234-238 ◽  
Author(s):  
Vishwanath D. Mote ◽  
Babasaheb N. Dole
Keyword(s):  
Room Temperature ◽  
Magnetic Hysteresis ◽  
Lattice Parameters ◽  
Precipitation Method ◽  
Average Crystalline Size ◽  
X Ray ◽  
Zno Nanocrystals ◽  
Doped Zno ◽  
Co Precipitation ◽  
Mn Doped

Nanosized Mn doped ZnO samples were synthesized by co-precipitation method using Polyethylene glycol (PEG) as a capping agent. X- ray diffraction patterns confirm that the pure and Mn doped ZnO nanocrystals have wurtzite structure without any seconadary phases. Lattice parameters of pure and Mn doped ZnO nanocrystals increase slightly with increasing Mn concentration. The average crystalline size of pure and Mn doped ZnO nanocrystals are in the range of 14-18 nm. The X-ray density for pure and Mn doped ZnO sample is calculated using lattice parameters. It is found that almost static for Mn doped ZnO samples. In the Zn1-xMnx samples, room temperature magnetic hysteresis is observed and the saturation magnetization increases with increasing Mn content. However, these samples show room temperature ferromagnetic in nature. Result of the present investigation compared without PEG.

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