Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applications
Tb3+ ion-doped Mg-Ni nanocrystalline ferrites with the chemical formula Mg0.2Ni0.8TbxFe2-xO4 (x = 0.00 to 0.25) were synthesized using the sol-gel auto-combustion method. The structural properties of all samples were analyzed using X-ray diffraction, FTIR, and UV–visible spectroscopy. XRD studies co...
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2025-12-01
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| author | Jettiboyina Anjaneyulu K.V. Ramesh D. Venkatesh Bimaleswar Sahu |
| author_facet | Jettiboyina Anjaneyulu K.V. Ramesh D. Venkatesh Bimaleswar Sahu |
| author_sort | Jettiboyina Anjaneyulu |
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| description | Tb3+ ion-doped Mg-Ni nanocrystalline ferrites with the chemical formula Mg0.2Ni0.8TbxFe2-xO4 (x = 0.00 to 0.25) were synthesized using the sol-gel auto-combustion method. The structural properties of all samples were analyzed using X-ray diffraction, FTIR, and UV–visible spectroscopy. XRD studies confirmed the existence of a secondary phase in samples with x = 0.15 to higher concentrations. The lattice constant decreased, and the X-ray density increased with increasing Tb3+ ions. The two prominent absorption bands observed in the FTIR spectra confirmed the spinel structure. The direct band gap obtained from the UV–vis investigation was in the range of 1.85–1.67 eV, confirming semiconducting behavior. The grain size calculated using FESEM increased with increasing Tb3+ concentration. DC electrical conductivity measurements also indicated the semiconducting characteristics of the samples. Magnetic measurements were performed using VSM. The addition of Tb3+ ions resulted in a decrease in the saturation magnetization from 29.32 (x = 0.00) to 8.61 (x = 0.25) emu/g. In addition, the anisotropy constant and anisotropy field decreased with increasing Tb3+ ion content because of secondary phase formation. Tunable magnetic softening, semiconducting nature, and anisotropy control are essential for tailoring materials for spintronic applications. |
| format | Article |
| id | doaj-art-322f7c661eeb47ccb99111ffff73373f |
| institution | Kabale University |
| issn | 2666-0326 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
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| series | Physics Open |
| spelling | doaj-art-322f7c661eeb47ccb99111ffff73373f2025-08-20T03:41:26ZengElsevierPhysics Open2666-03262025-12-012510030810.1016/j.physo.2025.100308Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applicationsJettiboyina Anjaneyulu0K.V. Ramesh1D. Venkatesh2Bimaleswar Sahu3Department of Physics, GITAM School of Science, GITAM Deemed to be University, Rushikonda, Visakhapatnam, A.P, IndiaDepartment of Physics, GITAM School of Science, GITAM Deemed to be University, Rushikonda, Visakhapatnam, A.P, India; Corresponding author.Department of Physics, B V Raju Institute of Technology, Narsapur, Medak, Telangana, 502313, IndiaDepartment of Physics, GITAM School of Science, GITAM Deemed to be University, Rushikonda, Visakhapatnam, A.P, IndiaTb3+ ion-doped Mg-Ni nanocrystalline ferrites with the chemical formula Mg0.2Ni0.8TbxFe2-xO4 (x = 0.00 to 0.25) were synthesized using the sol-gel auto-combustion method. The structural properties of all samples were analyzed using X-ray diffraction, FTIR, and UV–visible spectroscopy. XRD studies confirmed the existence of a secondary phase in samples with x = 0.15 to higher concentrations. The lattice constant decreased, and the X-ray density increased with increasing Tb3+ ions. The two prominent absorption bands observed in the FTIR spectra confirmed the spinel structure. The direct band gap obtained from the UV–vis investigation was in the range of 1.85–1.67 eV, confirming semiconducting behavior. The grain size calculated using FESEM increased with increasing Tb3+ concentration. DC electrical conductivity measurements also indicated the semiconducting characteristics of the samples. Magnetic measurements were performed using VSM. The addition of Tb3+ ions resulted in a decrease in the saturation magnetization from 29.32 (x = 0.00) to 8.61 (x = 0.25) emu/g. In addition, the anisotropy constant and anisotropy field decreased with increasing Tb3+ ion content because of secondary phase formation. Tunable magnetic softening, semiconducting nature, and anisotropy control are essential for tailoring materials for spintronic applications.http://www.sciencedirect.com/science/article/pii/S2666032625000584Nano ferriteSol-gel methodStructural and UV–VisibleVSMDC conductivityMagnetic properties |
| spellingShingle | Jettiboyina Anjaneyulu K.V. Ramesh D. Venkatesh Bimaleswar Sahu Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applications Physics Open Nano ferrite Sol-gel method Structural and UV–Visible VSM DC conductivity Magnetic properties |
| title | Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applications |
| title_full | Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applications |
| title_fullStr | Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applications |
| title_full_unstemmed | Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applications |
| title_short | Investigation of structural, electrical, and magnetic anisotropy studies of the rare earth (Tb3+) ion substituted Mg-Ni nanocrystalline ferrites for spintronic applications |
| title_sort | investigation of structural electrical and magnetic anisotropy studies of the rare earth tb3 ion substituted mg ni nanocrystalline ferrites for spintronic applications |
| topic | Nano ferrite Sol-gel method Structural and UV–Visible VSM DC conductivity Magnetic properties |
| url | http://www.sciencedirect.com/science/article/pii/S2666032625000584 |
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