CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Tailoring the optical and magnetic properties of La-BaM hexaferrites by Ni substitution |
Hafiz T. Ali1, M. Ramzan2, M Imran Arshad2, Nicola A. Morley3, M. Hassan Abbas2, Mohammad Yusuf4, Atta Ur Rehman2, Khalid Mahmood2, Adnan Ali2, Nasir Amin2, and M. Ajaz-un-Nabi2,† |
1 Department of Mechanical Engineering, College of Engineering, Taif University, Taif 21944, Saudi Arabia; 2 Department of Physics, Government College University, Faisalabad, Pakistan; 3 Department of Materials Science and Engineering, University of Sheffield, Sir Robert Hadfield Building, Mapping St., Sheffield, S1 3JD, UK; 4 Department of Clinical Pharmacy, College of Pharmacy, Taif University, Taif 21944, Saudi Arabia |
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Abstract We investigate the impact of Ni insertion on the structural, optical, and magnetic properties of Ba0.8La0.2Fe12-xNixO19 hexaferrites (Ni substituted La-BaM hexaferrites). Samples were prepared using the conventional co-precipitation method and sintered at 1000℃ for 4 hours to assist the crystallization process. An analysis of the structure of the samples was carried out using an x-ray diffraction (XRD) spectrometer. The M-type hexagonal structure of all the samples was confirmed using XRD spectra. The lattice parameters a and c were found to be in the ranges of 5.8925 ±0.001 nm-5.8952 ±0.001 nm and 23.2123 ±0.001 nm-23.2219 ±0.001 nm, respectively. The M-type hexagonal nature of the prepared samples was also indicated by the presence of corresponding FT-IR bands and Raman modes in the FT-IR and Raman spectra, respectively. EDX results confirmed the successful synthesis of the samples according to the required stoichiometric ratio. A UV-vis spectrometer was used to record the absorption spectra of the prepared samples in the wavelength range of 200 nm-1100 nm. The optical energy bandgap of the samples was found to be in the range of 1.21 eV-3.39 eV. The M-H loops of the samples were measured at room temperature at an applied magnetic field range of 0 kOe-60 kOe. A high saturation magnetization of 99.92 emu/g was recorded in the sample with x=0 at a microwave operating frequency of 22.2 GHz. This high value of saturation magnetization is due to the substitution of La3+ ions at the spin-up (12k, 2a, and 2b) sites. The Ni substitution is proven to be a potential candidate for the tuning of the optical and magnetic parameters of M-type hexaferrites. Therefore, we suggest that the prepared samples are suitable for use in magneto-optic applications.
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Received: 04 April 2021
Revised: 12 July 2021
Accepted manuscript online: 14 July 2021
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PACS:
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75.50.-y
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(Studies of specific magnetic materials)
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75.75.-c
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(Magnetic properties of nanostructures)
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Fund: Project supported by the Taif University Researchers Supporting Project number (TURSP-2020/293), Taif University, Taif, Saudi Arabia. |
Corresponding Authors:
M. Ajaz-un-Nabi
E-mail: majazunnabi@gcuf.edu.pk
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Cite this article:
Hafiz T. Ali, M. Ramzan, M Imran Arshad, Nicola A. Morley, M. Hassan Abbas, Mohammad Yusuf, Atta Ur Rehman, Khalid Mahmood, Adnan Ali, Nasir Amin, and M. Ajaz-un-Nabi Tailoring the optical and magnetic properties of La-BaM hexaferrites by Ni substitution 2022 Chin. Phys. B 31 027502
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