Статья

The effect of Mn and Co dual-doping on the structural, optical, dielectric and magnetic properties of ZnO nanostructures

Akif SafeenDepartment of Physics, University of Poonch, Rawalakot, AJK 12350, PakistanKashif SafeenDepartment of Physics, Abdul Wali Khan University, Mardan 23200, KPK, PakistanMuhammad ShafiqueDepartment of Physics, University of Poonch, Rawalakot, AJK 12350, PakistanYousaf IqbalDepartment of Physics, University of Poonch, Rawalakot, AJK 12350, PakistanNaveed AhmedDepartment of Physics, University of Poonch, Rawalakot, AJK 12350, PakistanM.A. KhanDepartment of Physics, University of Poonch, Rawalakot, AJK 12350, PakistanGhulam AsgharDepartment of Physics, University of Poonch, Rawalakot, AJK 12350, PakistanKhaled AlthubeitiDepartment of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21099, Saudi ArabiaSattam Al OtaibiDepartment of Electrical Engineering, Collage of Engineering, Taif University, P.O. Box 11099, Taif 21944, Saudi ArabiaGhafar AliNanomaterials Research Group, Physics Division, PINSTECH, Islamabad 45650, PakistanWiqar Hussain ShahDepartment of Physics, International Islamic University, Islamabad 44000, PakistanSattam Al OtaibiDepartment of Physics, University of Lakki Marwat, 28420, Khyber Pakhtunkhwa, Pakistan

2022en

ABI

Аннотация

assigned to Zn-O stretching, this validates the formation of the wurtzite structure of ZnO. Raman spectroscopy reveals the characteristic band of the wurtzite structure of ZnO nanoparticles along with coupled vibration modes of Mn/Co with the donor defect states in the doped samples. Enhanced optical absorption in the visible region and a significant red-shift in the absorption band edge were found due to doping. The optical band gap is found to decrease from 3.45 eV to 3.15 eV when Co doping increases up to 6%. The dielectric properties, strongly frequency-dependent, decrease with increasing Co doping while the electrical conductivity increases. Ferromagnetism is observed in all the doped samples, and its origin is attributed to an increase in oxygen vacancies which form bound magnetic polarons. It can be inferred that the doping of Mn and Co can be an effective tool to tune the physical properties of ZnO nanoparticles for potential spintronics and high-frequency applications.

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Идентификаторы

DOI: 10.1039/d2ra01798a

Цитирования и источники

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