Impact of Nd3+ doping on Mg0.5Zn0.5Fe2O4 nano-ferrite: structural, morphological, electrical resistivity, and magnetic properties Rajesh Yadav Mudi, V.L.N. Balaji Gupta Tiruveedhi, Yonatan Mulushoa S, P.S.V. Shanmukhi, Jasgurpreet Singh Chohan, Khalid Mujasam Batoo, Muhammad Farzik Ijaz South African Journal of Chemical Engineering, 2025 • XRD analysis confirmed a pure cubic spinel structure with no impurity phases. • FESEM analysis showed spherical grains with sizes ranging from 50 to 90 nm. Increasing Nd³⁺ concentration resulted in agglomerated particles, indicating a significant impact of doping on grain morphology. • Magnetic hysteresis studies indicated a transition from hard to soft magnetic behavior with doping. Saturation magnetization decreased (32.19 to 23.71 emu/g), and coercivity also reduced, which is beneficial for magneto-recording applications. • DC resistivity increased significantly with Nd³⁺ doping due to reduced electron hopping between Fe²⁺ and Fe³⁺ ions, demonstrating semiconducting behavior. This higher resistivity is advantageous for reducing eddy current losses. • The FTIR spectra revealed shifts in absorption bands corresponding to tetrahedral and octahedral sites, indicating the successful incorporation of Nd³⁺ ions into the lattice, modifying the material's vibrational characteristics. A homogeneous composite of ferrite oxide samples with the chemical formula Mg 0.5 Zn 0.5 Fe 2-x Nd x O 4 (0 ≤ x ≤ 0.10) was prepared via the sol-gel auto-combustion method, with Nd content varying in steps of 0.02. The Nd³⁺ ion concentration significantly influenced the Mg-Zn ferrites' magnetic properties and DC electrical resistivity. Room temperature X-ray diffraction (XRD) analysis verified a pure cubic structure with an Fd3m space group, showing no traces of impurity phases. The crystallite sizes varied between 35 and 52 nm, while the lattice parameters expanded from 8.392 to 8.418 Å with higher doping levels. Field emission scanning electron microscopy (FESEM) displayed spherical grains with an agglomerated structure, with grain diameters varying from 49 to 103 nm. Fourier-transform infrared (FTIR) spectroscopy showed two metallic bands consistent with cubic spinel ferrites. The magnetic properties, including coercivity (Hc), saturation magnetization (Ms), retentivity (Mr), squareness ratio (SQR), and hysteresis loops at room temperature, were analyzed using a vibrating sample magnetometer (VSM). The saturation magnetization values, which ranged from 32.19 to 23.71 emu/g, and the squareness ratio values, which ranged from 0.43 to 0.35, indicated a change from hard to soft magnets. According to a two-probe approach, the room temperature DC resistivity of the nanopowders was roughly 10 7 Ω•cm.
Evaluating the Effects of Vanadium- infused CaBP Nanophosphors: Insights into structural Morphological and Photoluminescent studies M. Rajesh Yadav, Ch. Rajyalakshmi, V.L.N. Balaji Gupta T, G.V. Lakshmikanth, R.V.S.S.N. Ravikumar Journal of Physics Conference Series, 2024 Due to their potential for use in numerous applications, including displays, medical imaging, lighting, and fluorescent lamps, phosphor luminescent materials especially those activated with transition metal ions— intensive research has been conducted over the last decade on these topics. Present document describes a report on the solid-state reaction method has been used to prepare nanophosphors of Ca6BP5O20:xVO2+ (x=0.01,0.03 & 0.05 mol%) and to examine the effects of vanadyl doping on structural and morphological studies using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR), and photoluminescence. Both the undoped and vanadyl-doped Calcium Borophosphate (CaBP and CaBP:xVO2+) nanophosphors. According to structural characteristics, both vanadium-undoped and vanadium-doped Calcium Borophosphate (CaBP&CaBP: VO2+) nanophosphors revealed triclinic structure, and the average crystallite sizes changed from 29 nm to 22 nm with increasing vanadium doping levels. Morphological research revealed that the pictures were like particles. Tetrahedral borate groups stretching vibration modes are represented in the FT-IR spectra by bands in the range of 1085-820 cm-1, whereas trigonal planar groups are represented by bands in the range of 1378-1236 cm-1. With an excitation wavelength of 385 nm, both undoped and vanadyl-doped photoluminescence spectra show a visible exude peak at 534 nm. The chromaticity results indicate that the VO2+ -doped CaBP nanophosphors had chromaticity coordinates (x,y) of (x = 0.2149, y = 0.5607), (x = 0.2119, y = 0.4688), and (x = 0.2110, y = 0.4071), correspondingly, which were located in blue-green, green, and pale blue colour spaces. When the dopant concentration is increased from 0.01 to 0.05 mol%, the light emission characteristics change from pale blue to green. These findings showed that transition metal ion-doped phosphor materials are appropriate for use in display device applications.
Influence of Iron Doped on Structural and Optical Absorption Studies of Calcium Borophosphate (CaBP) Nanophosphors Rajesh Y. Mudi, P. Radha K. Pambi, Venkata L. K. Ganti, Ravikumar N.S.S.V.R. Macromolecular Symposia, 2020 Novel inorganic phosphor luminescent materials are widely used in various optoelectronic devices such as field emission displays, plasma display panels, solid state lasers, cathode‐ray tubes, and tricolor white light emitting diodes. Structural and luminescence properties of calcium borophosphate phosphors with different Fe3+ concentrations using solid state reaction technique have been investigated. X‐ray powder diffraction reveals that all samples exhibited a triclinic system of CaBP and lattice parameter analysis indicated the dopant ions may be substituted into the lattice position of the parent atom. The surface morphology of prepared nanophosphors is identified by SEM with EDS and TEM, which shows spherical‐like chains in an irregular spatial distribution with less agglomeration. Optical studies give the information about the site symmetry of dopant ions with host ligands.
Rietveld refinement and phase analysis of V-doped hexagonal LuFeO 3 S Leelashree, MR Yadav, P Suresh AIP Conference Proceedings 3361 (1), 030033 , 2025 2025.0
Rainfall prediction using CAPE and surface temperatures in three major Indian cities S Sridevi, KT Rao, J Das, AN Babu, SK Das, MR Yadav, ... AIP Conference Proceedings 3298 (1), 040030 , 2025 2025.0
Impact of Nd3+ doping on Mg0. 5Zn0. 5Fe2O4 nano-ferrite: structural, morphological, electrical resistivity, and magnetic properties RY Mudi, VLNBG Tiruveedhi, Y Mulushoa S, PSV Shanmukhi, JS Chohan, ... South African Journal of Chemical Engineering 53 (1), 476-482 , 2025 2025.0 Citations: 3
Evaluating the Effects of Vanadium-infused CaBP Nanophosphors: Insights into structural Morphological and Photoluminescent studies M Rajesh Yadav, C Rajyalakshmi, VLN Balaji Gupta T, GV Lakshmikanth, ... Journal of Physics: Conference Series 2779 (1), 012075 , 2024 2024.0
Structural investigation, magnetic and DC electrical resistivity properties of Co0.5-xNixZn0.5Fe2O4 nano ferrites Rajesh Yadav Mudi, V.L.N. Balaji Gupta Tiruveedhi, D. Kothandan, P.S.V ... Inorganic Chemistry Communications 160 (111958), 1-9 , 2024 2024.0 Citations: 17
Exploration of the structural, magnetic, and DC electrical resistivity characteristics of nanoparticles consisting of Sm3+ substituted NiCuZn spinel ferrite VLNBGT Bade Venkata Suresh, Ganimisetti Srinivasa Rao, Rajesh Yadav Mudi Inorganic Chemistry Communications 159 (111850) , 2024 2024.0 Citations: 9
Characterization and spectroscopic investigations of zinc alumino lithium borate glasses doped with TiO2 BT Rao, BRV Rao, C Rajyalakshmi, G Sridevi, MR Yadav, GVL Kanth, ... Materials Today: Proceedings , 2023 2023.0 Citations: 4
Effect of VO2+ ions incorporation on paramagnetic behavior of Calcium Borophosphate (CaBP) nanophosphors: A detailed study of structural and EPR properties MR Yadav, GV Lakshmikanth, P Suresh, R Ravikumar Materials Today: Proceedings 92, 1142-1148 , 2023 2023.0
Influence of Iron Doped on Structural and Optical Absorption Studies of Calcium Borophosphate (CaBP) Nanophosphors RYMPRKPVLKGRNSS V.R. Macromolecular Symposia 3 (1), https://doi.org/10.1002/masy.201900214 , 2020 2020.0
Influence of compositional variation on structural, optical and EPR studies of undoped and Mn2+ doped lithium sodium zinc pyrophosphates (LNZP) MR Yadav, PR Krishna, BT Rao, BRV Rao, GV Lakshmikanth Materials Today: Proceedings 5 (12), 25807-25814 , 2018 2018.0 Citations: 3
Structural and optical properties of Cu(II) ions doped calcium borophosphate (CaBP) nanophosphor by solid-state synthesis RVSSNR M. Rajesh Yadav, B. Jaya Raja, M. Avinash, Ch. Rama Krishna J Mater Sci: Mater Electron 27 (148), 1318–1327 , 2016 2016.0 Citations: 16
Spectroscopic studies of undoped and Mn2+-doped calcium borophosphate phosphor (CaBP) nanopowders RVSSNR M R Yadav, B J Raja, V P Manjari, M Avinash, C R Krishna Indian Journal of Physics , 2015 2015.0 Citations: 4
Spectral Investigations on Cu2+-doped Li2CaAl4(PO4)4F4 Phosphors RVSSNR B. Jaya Raja,M. Rajesh Yadav1, V. Pushpa Manjari, K. Ravindranadh, M ... Applied Magnetic Resonance , 2015 2015.0 Citations: 5
Synthesis and characterization of undoped and Mn(II)ions doped Li2CaAl4(PO4)4F4 nanophosphors RVSSNR B. Jaya Raja, M. Rajesh Yadav, V. Pushpa Manjari, B. Babu, Ch. Rama ... Journal of Molecular Structure 1076, 461-467 , 2014 2014.0 Citations: 15
Structural,spectroscopicandmagneticcharacterization of undoped,Ni2þ doped ZnOnanopowders RVSSNR B. Babu,G.RamaSundari,K.Ravindranadh,M.RajeshYadav Journal ofMagnetismandMagneticMaterials 372, 79-85 , 2014 2014.0 Citations: 37
Effect of mass flow rate and temperature on the performance of PEM fuel cell: an experimental study M Yadav, B Sahu, B Gupta, S Bhatt Int J Curr Eng Technol 3 (3), 950-956 , 2013 2013.0 Citations: 12
COVID-19 Crisis: Exploring Challenges, Opportunities, and Cautions PS Brahmanandam, KKJ Chakravarthy, G Uma, JVK Kumar, TKS Ram, ...
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MOST CITED SCHOLAR PUBLICATIONS
Structural,spectroscopicandmagneticcharacterization of undoped,Ni2þ doped ZnOnanopowders RVSSNR B. Babu,G.RamaSundari,K.Ravindranadh,M.RajeshYadav Journal ofMagnetismandMagneticMaterials 372, 79-85 , 2014 2014.0 Citations: 37
Structural investigation, magnetic and DC electrical resistivity properties of Co0.5-xNixZn0.5Fe2O4 nano ferrites Rajesh Yadav Mudi, V.L.N. Balaji Gupta Tiruveedhi, D. Kothandan, P.S.V ... Inorganic Chemistry Communications 160 (111958), 1-9 , 2024 2024.0 Citations: 17
Structural and optical properties of Cu(II) ions doped calcium borophosphate (CaBP) nanophosphor by solid-state synthesis RVSSNR M. Rajesh Yadav, B. Jaya Raja, M. Avinash, Ch. Rama Krishna J Mater Sci: Mater Electron 27 (148), 1318–1327 , 2016 2016.0 Citations: 16
Synthesis and characterization of undoped and Mn(II)ions doped Li2CaAl4(PO4)4F4 nanophosphors RVSSNR B. Jaya Raja, M. Rajesh Yadav, V. Pushpa Manjari, B. Babu, Ch. Rama ... Journal of Molecular Structure 1076, 461-467 , 2014 2014.0 Citations: 15
Effect of mass flow rate and temperature on the performance of PEM fuel cell: an experimental study M Yadav, B Sahu, B Gupta, S Bhatt Int J Curr Eng Technol 3 (3), 950-956 , 2013 2013.0 Citations: 12
Exploration of the structural, magnetic, and DC electrical resistivity characteristics of nanoparticles consisting of Sm3+ substituted NiCuZn spinel ferrite VLNBGT Bade Venkata Suresh, Ganimisetti Srinivasa Rao, Rajesh Yadav Mudi Inorganic Chemistry Communications 159 (111850) , 2024 2024.0 Citations: 9
Spectral Investigations on Cu2+-doped Li2CaAl4(PO4)4F4 Phosphors RVSSNR B. Jaya Raja,M. Rajesh Yadav1, V. Pushpa Manjari, K. Ravindranadh, M ... Applied Magnetic Resonance , 2015 2015.0 Citations: 5
Characterization and spectroscopic investigations of zinc alumino lithium borate glasses doped with TiO2 BT Rao, BRV Rao, C Rajyalakshmi, G Sridevi, MR Yadav, GVL Kanth, ... Materials Today: Proceedings , 2023 2023.0 Citations: 4
Spectroscopic studies of undoped and Mn2+-doped calcium borophosphate phosphor (CaBP) nanopowders RVSSNR M R Yadav, B J Raja, V P Manjari, M Avinash, C R Krishna Indian Journal of Physics , 2015 2015.0 Citations: 4
Impact of Nd3+ doping on Mg0. 5Zn0. 5Fe2O4 nano-ferrite: structural, morphological, electrical resistivity, and magnetic properties RY Mudi, VLNBG Tiruveedhi, Y Mulushoa S, PSV Shanmukhi, JS Chohan, ... South African Journal of Chemical Engineering 53 (1), 476-482 , 2025 2025.0 Citations: 3
Influence of compositional variation on structural, optical and EPR studies of undoped and Mn2+ doped lithium sodium zinc pyrophosphates (LNZP) MR Yadav, PR Krishna, BT Rao, BRV Rao, GV Lakshmikanth Materials Today: Proceedings 5 (12), 25807-25814 , 2018 2018.0 Citations: 3
Rietveld refinement and phase analysis of V-doped hexagonal LuFeO 3 S Leelashree, MR Yadav, P Suresh AIP Conference Proceedings 3361 (1), 030033 , 2025 2025.0
Rainfall prediction using CAPE and surface temperatures in three major Indian cities S Sridevi, KT Rao, J Das, AN Babu, SK Das, MR Yadav, ... AIP Conference Proceedings 3298 (1), 040030 , 2025 2025.0
Evaluating the Effects of Vanadium-infused CaBP Nanophosphors: Insights into structural Morphological and Photoluminescent studies M Rajesh Yadav, C Rajyalakshmi, VLN Balaji Gupta T, GV Lakshmikanth, ... Journal of Physics: Conference Series 2779 (1), 012075 , 2024 2024.0
Effect of VO2+ ions incorporation on paramagnetic behavior of Calcium Borophosphate (CaBP) nanophosphors: A detailed study of structural and EPR properties MR Yadav, GV Lakshmikanth, P Suresh, R Ravikumar Materials Today: Proceedings 92, 1142-1148 , 2023 2023.0
Influence of Iron Doped on Structural and Optical Absorption Studies of Calcium Borophosphate (CaBP) Nanophosphors RYMPRKPVLKGRNSS V.R. Macromolecular Symposia 3 (1), https://doi.org/10.1002/masy.201900214 , 2020 2020.0
COVID-19 Crisis: Exploring Challenges, Opportunities, and Cautions PS Brahmanandam, KKJ Chakravarthy, G Uma, JVK Kumar, TKS Ram, ...
Absorption Spectrum of Dy3+ Doped Alkali Zinc Borate Glass RVSSNR B. Sailaja, M. Avinash, M. Rajesh Yadav, R. Joyce Stella International Journal of Advanced Research in Physical Science (IJARPS) 2 … , 0
