1College of Commerce, Arts and Science, Patna, Bihar, India 2Jaypee University of Engineering and Technology, Guna, Madhya Pradesh, India 3Anugrah Narayan College, Patna, Bihar, India 4Aryabhatta Knowledge University, Patna, Bihar, India
Zn0.90Ni0.10O nanoparticles have been synthesized by single-bath two-electrode electrodeposition at constant voltage. X-ray diffraction, UV vis and photoluminescence studies reveal that a single-phase polycrystalline hcp wurtzite crystal structure of ZnO is evolved. The material consists of a large number of defects such as oxygen vacancy (Ov) and zinc interstitial (Zi). The magnetization study reveals that the sample exhibits room-temperature global ferromagnetism and the ferromagnetic ordering seems to be defect induced via bound magnetic polaron mechanism, and double exchange is also expected to have played role. Interesting optoelectronic properties have been found in the synthesized sample and the material seems to be a potential candidate to be used as a UV sensor. Such a transition metal doped ZnO based dilute magnetic semiconducting system exhibiting room-temperature ferromagnetism is likely to be first of its kind in the sense that such materials have not yet been reported to be synthesized by the simple method of electrodeposition to the best of our knowledge on the basis of ample literature review.
* Project supported by the UGC-DAE, Consortium for Scientific Research, Indore through its CRS project bearing No. CSR-IC/MSRSR-12/CRS-220/2017-18/1301.
Cite this article:
Deepika, Raju Kumar, Ritesh Kumar, Kamdeo Prasad Yadav, Pratyush Vaibhav, Seema Sharma, Rakesh Kumar Singh, and Santosh Kumar† Defect induced room-temperature ferromagnetism and enhanced photocatalytic activity in Ni-doped ZnO synthesized by electrodeposition 2020 Chin. Phys. B 29 108503
Fig. 1.
XRD pattern of (a) Ni-doped ZnO and (b) undoped ZnO, both synthesized by electrodeposition and annealed at 700 °C in air for one hour.
Fig. 2.
(a) UV visible graph of un-doped ZnO (synthesized by electrodeposition and annealed at 700 °C in air for one hour) for absorbance and band gap determination. (b) UV visible graph of Ni-doped ZnO (synthesized by electrodeposition and annealed at 700 °C in air for one hour) for absorbance and band gap determination.
Fig. 3.
(a) PL spectra of Ni-doped ZnO synthesized by electrodeposition and annealed at 700 °C in air for one hour. (b) PL spectra of undoped ZnO synthesized by electrodeposition and annealed at 700 °C in air for one hour.
Fig. 4.
VSM graph of Ni-doped ZnO synthesized by electrodeposition and annealed at 700 °C in air for one hour.
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