Ramesh Thotakura
@bvrithyderabad.edu.in
Assistant Professor Department of Physics
BVRITHYDERABAD College of Engineering for Women
EDUCATION
PhD ( Materials science) from Osmania University
RESEARCH INTERESTS
Ceramics, magnetic materials, composites, sensor
69
Scopus Publications
422
Scholar Citations
12
Scholar h-index
13
Scholar i10-index
Scopus Publications
- Comparison of structural, optical, electrical and magnetic properties between Ni<inf>0.5</inf>Co<inf>0.5</inf>Gd<inf>0.005</inf>Tb<inf>0.005</inf>Fe<inf>1.99</inf>O<inf>4</inf> and Ni<inf>0.5</inf>Co<inf>0.5</inf>Gd<inf>0.0033</inf>Tb<inf>0.0033</inf>Dy<inf>0.0033</inf>Fe<inf>1.99</inf>O<inf>4</inf>
P. Sowjanya, G. Thirupathi, M. Sharath Kumar, T. Ramesh, M.V. Ramana Reddy, Arout Chelvane, and N. Pavan Kumar
Elsevier BV - Impact of Process Parameters and Dopant Concentration on Structural, Magnetic, and Dielectric Properties of Dysprosium-doped Nickel-Zinc Ferrites Synthesized by Microwave Hydrothermal Method
T. Ramesh, P. Usha, P. Neelima, and N. Pavan Kumar
The Electrochemical Society
This study aims to investigate the impact of substituting Dy3+ ions on the structural, magnetic and dielectric properties of Nickel Zinc (Ni-Zn) ferrites, which have the chemical formula Ni0.5Zn0.5DyxFe2-xO4 (where x = 0, 0.01, 0.03, 0.05, 0.07, and 0.09). These ferrites were synthesized using a microwave hydrothermal technique with different process parameters. Structural characterization of the synthesized powders was carried out using X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR). The XRD analysis confirmed the presence of a pure spinel phase for Dy concentrations (x) up to 0.05. However, when x ≥ 0.07, an additional orthoferrite phase (DyFeO3) was observed along with the spinel phase. FTIR spectra revealed a shift in low-frequency wave numbers due to Dy3+ ion substitution. The size and morphology of the synthesized powder particles were examined using field emission scanning electron microscopy (FESEM). The powder compacts were sintered using microwave processing at 900 °C for 40 min. The increase in dc. resistivity is observed with an increase in Dy3+ concentration, mainly due to the change in the hopping mechanism with the substitution concentration. Dielectric properties such as dielectric constant and loss are measured in the frequency range of 100 Hz to 1.8 GHz. The high value of dielectric constant and loss observed in the low-frequency region compared to the high-frequency region. Maxwell’s Wagner model and ‘Koop’s theory explains the variation in dielectric properties with the frequency. The magnetic hysteresis loops were measured at different temperatures and observed to enhance the low-temperature magnetic properties compared to room temperature. The results suggest that the magnetic and dielectric properties of the investigated samples can be adjusted by varying the concentration of Dy3+ ions, providing the ability to tailor these properties according to specific application requirements. - Structural, Optical, Magnetic and Dielectric Properties of Ce-Doped MgFe<inf>2</inf>O<inf>4</inf> Prepared by Microwave Hydrothermal Method
T. Suresh Kumar, G. Sriramulu, P. Raju, T. Ramesh, K. Praveena, and S. Katlakunta
The Electrochemical Society
The microwave hydrothermal method has been used to synthesize MgFe2-x Ce x O4 (x = 0.0 – 0.10) nanoparticles, which have been characterized using X-ray diffraction (XRD), fourier transform Infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), UV–vis spectrometer, vibrating sample magnetometer (VSM) and dielectric properties. XRD investigation confirms the cubic spinel structure, and the Debye–Scherrer formula was used to determine the crystallite size, showing values of 19 – 108 nm. FTIR confirms the presence of all functional groups and FE-SEM displays particle-like morphology. The UV-visible analysis was used to explain the variation of the optical bandgap as Ce3+ doping increased. VSM analysis of MgFe2-x Ce x O4 showed ferromagnetic behaviour. The samples exhibit low magnetization values ranging from 8.83 emu g−1 to 18.91 emu g−1. The values of the dielectric constant (ε′) and the dielectric loss (tanδ) decreased with frequency due to the influence of space-charge polarization and showed a dispersive behaviour at higher frequencies. - Effect of glass modifier to former ratio on spectroscopic and transport properties of silver boro-tellurite glass system
Puli Nageshwer Rao, K. Chandra Sekhar, T. Ramesh, M Chandra Shekhar Reddy, Kodumuri Veerabhadra Rao, Md. Shareefuddin, and B. Appa Rao
Springer Science and Business Media LLC - Enhanced microwave absorbing properties of manganese zinc ferrite: polyaniline nanocomposites
T. Ramesh, K. Sadhana, and K. Praveena
Springer Science and Business Media LLC - Effect of Dy<sup>3+</sup> substitution on structural and magnetodielectric properties of Mn–Zn ferrites synthesized by microwave hydrothermal method
P. Neelima, P. Usha, T. Ramesh, and Kiran Kumar Ganta
Springer Science and Business Media LLC - Magnetodielectric Comparison Study Between Microwave and Conventional Sintered NiCuZn Ferrites
Thotakura Ramesh, Basireddy Sravanthi, Kollu Ashok, A. Bhaskar, and Anji Reddy Polu
Wiley - Structural, Magnetic, and Dielectric Properties of Y<inf>2</inf>GdFe<inf>5</inf>O<inf>12</inf> Synthesized by Hydrothermal Method
Thotakura Ramesh, M. Chandra Shekhar Reddy, Basireddy Sravanthi, Anjireddy polu, and P. Nageswar Rao
Wiley - Preparation and Characterization of ZnO – ZnFe<inf>2</inf>O<inf>4</inf> Nanocomposites
Surasi Kiran, Konagolla Saibaba, Thotakura Ramesh, Kollu Ashok, and Anji Reddy Polu
Wiley - Development of solid polymer electrolytes based on poly (ethylene oxide) complexed with 2-trifluoromethyl-4, 5-dicyanoimidazole lithium salt and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid for Li-ion batteries
Anji Reddy Polu, Pramod K Singh, P Siva kumar, Girish M Joshi, T Ramesh, IM Noor, Aysh Y Madkhli, and Sunanda Kakroo
SAGE Publications
Ion conducting solid polymer electrolyte films based on polymer poly (ethylene oxide) (PEO) complexed with 2-trifluoromethyl-4, 5-dicyanoimidazole lithium salt and ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide are synthesized using anhydrous acetonitrile as solvent. Prepared electrolyte films are characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), complex impedance spectroscopy and cyclic voltammetry techniques. Incorporation of IL into the PEO20-LiTDI polymer electrolyte changes different physicochemical properties of these materials. By characterizations, particularly XRD, DSC and ionic conductivity studies, the synthesized SPEs showed decreased crystallinity, melting points and increased ionic conductivity by the introduction of ionic liquid. The 40 wt% of IL doped polymer electrolyte showed an ionic conductivity of the order of 1.78 × 10−4 S/cm at 60°C with better thermal stability. The optimum conducting composition showed very good electrochemical stability window at ambient temperature. These results suggested that the IL-doped polymer electrolyte would be a potential separator in Li-ion batteries. - A comparative study of antibacterial, anticancer and gas-sensing properties of zinc oxide nanostructures synthesized by different routes
T. Ramesh, B. Sravanthi, G. Umadevi, K. Ramaiah, B. Anna Tanuja Safala, and T. Suneetha
Springer Science and Business Media LLC - Structural, magnetoelectric properties of multidoped Ni–Al ferrites for microwave circulator applications
T. Ramesh, B. Sravanthi, Kiran Kumar Ganta, K. Praveena, J. Naga Vishnu Vardhan, and Anji Reddy Polu
Springer Science and Business Media LLC - Effect of sintering temperature on the magnetodielectric performance of nickel ferrite
T. Ramesh, V. Madhavi, P. Neelima, K. Nagendra Kumar, N. Bakthavatchala Reddy, and Grigory V. Zyryanov
AIP Publishing - Nanocomposite hydrogels for wastewater treatment
V. Madhavi, T. Ramesh, N. Bhakthavatchala Reddy, and Grigory V. Zyryanov
AIP Publishing - Structural, vibrational and magnetic properties of Cu-substituted Mn<inf>0.5</inf>Zn<inf>0.5</inf>Fe<inf>2</inf>O<inf>4</inf> nanoparticles
T. Suneetha, G. Narayana Rao, and T. Ramesh
Springer Science and Business Media LLC - Crystal chemistry, Rietveld analysis, magnetic and microwave properties of Cu-doped strontium hexaferrites
N. Maramu, G. Sriramulu, T. Ramesh, D. Ravinder, S. Katlakunta, T. Anil Babu, and N. V. Krishna Prasad
Springer Science and Business Media LLC - On the Structural and Magnetic Properties of Mn-Bi Alloy Jet Milled at Different Feed Rates
V. V. Ramakrishna, S. Kavita, T. Ramesh, Ravi Gautam, and R. Gopalan
Springer Science and Business Media LLC - Structural and microwave behavior of Dy<sup>3+</sup>-substituted Ni<inf>0.5</inf>Zn<inf>0.5</inf>Dy<inf>x</inf>Fe<inf>2-x</inf>O<inf>4</inf> ferrites
P. Neelima, T. Ramesh, P. Raju, and S. R. Murthy
Springer Science and Business Media LLC - Preparation and characterization of (100 − x) TiO<inf>2</inf> + (x)ZnO nanocomposites for dye-sensitized solar cells using Beta vulgaris and Syzygium cumini natural dye extract
S. Kiran, T. Ramesh, and S. R. Murthy
Springer Science and Business Media LLC - Microwave-Hydrothermal Synthesis of Y<inf>3</inf>Fe<inf>5</inf>O<inf>12</inf> Nanoparticles: Sintering Temperature Effect on Structural, Magnetic and Dielectric Properties
T. Ramesh, G. Narayana Rao, T. Suneetha, R. S. Shinde, V. Rajendar, S. R. Murthy, and S. Arun Kumar
Springer Science and Business Media LLC - Investigation of superparamagnetism in microwave and conventional processed Mn<inf>0.5</inf>Zn<inf>0.5</inf>Fe<inf>2</inf>O<inf>4</inf> nanoparticles
Narayana Rao Gurram, Ramesh T., Suneetha T., and T. K. Nath
Springer Science and Business Media LLC - Y<inf>3−x</inf>Gd<inf>x</inf>Fe<inf>5</inf>O<inf>12</inf>: controlled synthesis, characterization and investigation of its magnetic properties
T. Ramesh, R. S. Shinde, S. Senthil Kumar, and S. R. Murthy
Springer Science and Business Media LLC - CoFe<inf>2</inf>O<inf>4</inf>–BaTiO<inf>3</inf> multiferroic composites: role of ferrite and ferroelectric phases on the structural, magneto dielectric properties
T. Ramesh, V. Rajendar, and S. R. Murthy
Springer Science and Business Media LLC - Electromagnetic properties of nanocrystalline Al<sup>3+</sup> substituted MgCuMn ferrites synthesized by microwave hydrothermal method
T RAMESH and S R MURTHY
Springer Science and Business Media LLC - Effect of aluminum substitution on structural and electromagnetic properties of nanocrystalline MgCuMn ferrites
T. Ramesh, S. Senthil Kumar, R. S. Shinde, and S. R. Murthy
AIP Publishing LLC
The effect of substitution of nonmagnetic Al3+ ions on the structural and electromagnetic properties were studied in nanocrystalline ferrite series of Mg0.8Cu0.2AlxFe1.95-xMn0.05O4 where x varies 0-0.4 in steps of 0.1. This series was synthesized by using microwave hydrothermal method. The nanocrystalline ferrite phase was observed at temperature 150°C/40 min. Synthesized powders were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The synthesized powders were densified using microwave sintering method at 950°C/40 min. The sintered samples were characterized using XRD. Surface morphology was observed by using field effective scanning electron microscopy (FESEM). The electrical and magnetic properties were measured at room temperature. These results led us to interfere that the values of d.c resistivity increases and dielectric constant, initial permeability, saturation magnetization and Curie temperature were observed to be decreased with the substitution of Al3+ io...
RECENT SCHOLAR PUBLICATIONS
- Structural, Optical, ESR, Magnetic and Anticancer Properties of Co1-xZnxFe2O4 (x= 0 to 1) Ferrites Synthesized by Ultrasonication Assisted Co-precipitation Method
T Ramesh, K Ashok, N Basavegowda, K Vagdevi, D Venkatesh, ...
Materials Chemistry and Physics, 130752 2025 - Tailoring the Structural, Optical, Magnetic, and Dielectric Properties of Yttrium-Substituted Magnesium Ferrite via Microwave Hydrothermal Synthesis
TS Kumar, KK Kumar, T Ramesh, I Radhika, K Praveena, S Katlakunta
Materials Chemistry and Physics, 130528 2025 - Impact of ultrasonic-assisted co-precipitation synthesis and ultrasonication duration on cobalt ferrite nanostructures: A comparative study of structural, morphological
T Ramesh, V Madhavi, PV Rao, K Vagdevi, N Basavegowda, KH Baek
Inorganic Chemistry Communications, 114035 2025 - Role of Dysprosium Incorporation on Structural and Magnetic Properties of Yttrium Iron Garnet for High Power Microwave Device Applications
T Ramesh, K Ashok, JNV Vardhan, PV Rao
Ceramics International 2025 - Promising antibiofilm formation: Liquid phase pulsed laser ablation synthesis of Graphene Oxide@Platinum core-shell nanoparticles
TR Buthenia A. Hasoon1 , Dahlia M. A. Hasan2 , Kareem H. JawadID3 , Saaud S ...
PLOS ONE 2024 - Investigation of Structural and Magnetic Properties of Lead-Free NCFO-BTO Composites
P Naveen, KD Reddy, T Ramesh, VR Reddy, MM Raja, NP Kumar
Journal of Superconductivity and Novel Magnetism 37 (8), 1701-1711 2024 - Preparation, Structural, and Magnetic Properties of Soft (Ni0.6Zn0.4Fe2O4) and Hard (BaFe12O19) Ferrite Composites
T Ramesh, P Usha, D Venkatesh, K Sadhana, K Praveena, K Ashok
Journal of Superconductivity and Novel Magnetism 37 (8), 1617-1628 2024 - Structural, morphological, optical, and magnetic properties of NiO-added NiCo2O4 electrode materials synthesized by sol-gel, Co-precipitation and ultrasonication methods and
K Vamsikrishna, P Usha, D Venkatesh, T Ramesh
Ceramics International 50 (17), 30869-30878 2024 - Improved electrical properties of Ba1−xCaxCe0.8Nd0.2O3−δ solid oxide fuel cells
TR J. Kishore Babu, G. Srinivas Reddy, T.V. Nagalakshmi, K. Ankamma, M.V.N.V ...
Inorganic chemistry communications 169, 113105 2024 - Multifunctional characterization and anticancer properties of magnetic zinc ferrite nanoparticles by modified ultrasonic assisted co-precipitation method
K Ashok, P Usha, T Ramesh, NP Kumar, GM Sulaiman
ECS Journal of Solid State Science and Technology 13 (8), 083011 2024 - Effect of Ho3+ Doping on Structural and Magnetic Properties of Multiferroic YbMnO3
NK Yadav, D Reddy, D Swathi, R Nagaraju, P Sowjanya, PK KN, ...
ECS Journal of Solid State Science and Technology 13 (7), 073014 2024 - Tunable Magnetic and Dielectric Properties of BaMg0. 4Al0. 4Fe11. 2O19 and SiO2 Composites for High-Frequency Applications
T Ramesh, K Ashok, P Usha, NP Kumar, K Sadhana, K Praveena
ECS Journal of Solid State Science and Technology 13 (7), 073008 2024 - Impact of pH on structural, morphological, optical, and magnetic properties of zinc oxide nanopowders synthesized by co-precipitation method
ACPTR Kanakamedala Sowmya, Yarramareddy Aparna
Journal of Materials Science: Materials in Electronics 35 (14) 2024 - Comparison of structural, optical, electrical and magnetic properties between Ni0. 5Co0. 5Gd0. 005Tb0. 005Fe1. 99O4 and Ni0. 5Co0. 5Gd0. 0033Tb0. 0033Dy0. 0033Fe1. 99O4
P Sowjanya, G Thirupathi, MS Kumar, T Ramesh, MVR Reddy, ...
Journal of Alloys and Compounds 971, 172623 2024 - Influence of Metal (Al, Mg, Sm and Cu) Dopants on Structural, Optical, Magnetic and Antimicrobial Properties of ZnO Nanopowders Synthesized by Co‐Precipitation Method.
K Sowmya, Y Aparna, AC Prakash, T Ramesh, A Bhaskar
physica status solidi (a) 2023 - Impact of process parameters and dopant concentration on structural, magnetic, and dielectric properties of dysprosium-doped nickel-zinc ferrites synthesized by microwave
T Ramesh, P Usha, P Neelima, NP Kumar
ECS Journal of Solid State Science and Technology 12 (10), 103016 2023 - Structural, optical, magnetic and dielectric properties of Ce-doped MgFe2O4 prepared by microwave hydrothermal method
TS Kumar, G Sriramulu, P Raju, T Ramesh, K Praveena, S Katlakunta
ECS Journal of Solid State Science and Technology 12 (9), 093014 2023 - Effect of glass modifier to former ratio on spectroscopic and transport properties of silver boro-tellurite glass system
PN Rao, KC Sekhar, T Ramesh, MCS Reddy, KV Rao, M Shareefuddin, ...
Journal of Materials Science: Materials in Electronics 34 (25), 1756 2023 - Nanocomposite Materials for Dye-Sensitized Solar Cells
T Ramesh, V Madhavi
Modern Nanotechnology: Volume 2: Green Synthesis, Sustainable Energy and 2023 - Enhanced microwave absorbing properties of manganese zinc ferrite: polyaniline nanocomposites
T Ramesh, K Sadhana, K Praveena
Journal of Materials Science: Materials in Electronics 34 (15), 1245 2023
MOST CITED SCHOLAR PUBLICATIONS
- Nanocrystalline gadolinium iron garnet for circulator applications
T Ramesh, RS Shinde, SR Murthy
Journal of magnetism and magnetic materials 324 (22), 3668-3673 2012
Citations: 71 - CoFe2O4–BaTiO3 multiferroic composites: role of ferrite and ferroelectric phases on the structural, magneto dielectric properties
SRM T.Ramesh, V.Rajender
Journal of materials science: Materials in electronics 2017
Citations: 43 - Synthesis and characterization of nanocrystalline Ni0. 94Co0. 03Mn0. 04Cu0. 03Fe1. 96− xAlxO4 ferrites for microwave device applications
T Ramesh, RS Shinde, SR Murthy
Journal of magnetism and magnetic materials 345, 276-281 2013
Citations: 41 - Microwave-Hydrothermal Synthesis of Y3Fe5O12 Nanoparticles: Sintering Temperature Effect on Structural, Magnetic and Dielectric Properties
TRGNRTSRSSVRSRMSA Kumar
journal of superconductivity and novel magnetism 2017
Citations: 23 - Y3−xGdxFe5O12: controlled synthesis, characterization and investigation of its magnetic properties
RSSSSKSRM T. Ramesh
Journal of Materials Science: Materials in Electronics 2017
Citations: 21 - Electromagnetic properties of nanocrystalline Al3+ substituted MgCuMn ferrites synthesized by microwave hydrothermal method
T RAMESH, SR MURTHY
Bulletin of Materials Science 2016, 1-9 2016
Citations: 21 - Fabrication of microinductor using Nanocrystalline NiCuZn ferrites
S Bharadwaj, T Ramesh, SR Murthy
Journal of Electroceramics 31, 81-87 2013
Citations: 19 - Structural and microwave behavior of Dy3+-substituted Ni0.5Zn0.5DyxFe2-xO4 ferrites
SRM P. Neelima, T. Ramesh, P. Raju
Journal of materials science: Materials in electronics 32 (2), 1729–1740 2021
Citations: 16 - Synthesis and characterization of NiCoMnCuFe1. 96O4 for circulator application
T Ramesh, RS Shinde, SR Murthy
Journal of magnetism and magnetic materials 323 (12), 1593-1598 2011
Citations: 16 - Effect of Dy3+ substitution on structural and magnetodielectric properties of Mn–Zn ferrites synthesized by microwave hydrothermal method
P Neelima, P Usha, T Ramesh, KK Ganta
Journal of Materials Science: Materials in Electronics 34 (8), 758 2023
Citations: 15 - A comparative study of antibacterial, anticancer and gas-sensing properties of zinc oxide nanostructures synthesized by different routes
TS T. Ramesh, B. Sravanthi, G.Umadevi, K.Ramaiah, B. Anna Tanuja Safala
Journal of Materials Science: Materials in Electronics 34 (1), 19 2023
Citations: 15 - Ferrite+ Polymer nanocomposites for EMI applications
P Raju, T Ramesh, SR Murthy
2015
Citations: 13 - Crystal chemistry, Rietveld analysis, magnetic and microwave properties of Cu-doped strontium hexaferrites
N Maramu, G Sriramulu, T Ramesh, D Ravinder, S Katlakunta, TA Babu, ...
Journal of Materials Science: Materials in Electronics 32, 10376-10387 2021
Citations: 11 - Preparation and characterization of (100 − x) TiO2 + (x)ZnO nanocomposites for dye-sensitized solar cells using Beta vulgaris and Syzygium cumini natural dye extract
TRSRM S Kiran
Journal of Materials Science: Materials in Electronics 29 (14), 11712–11718 2018
Citations: 9 - Structural, magnetoelectric properties of multidoped Ni–Al ferrites for microwave circulator applications
T Ramesh, B Sravanthi, KK Ganta, K Praveena, JNV Vardhan, AR Polu
Applied Physics A 128 (11), 957 2022
Citations: 7 - Enhanced microwave absorbing properties of manganese zinc ferrite: polyaniline nanocomposites
T Ramesh, K Sadhana, K Praveena
Journal of Materials Science: Materials in Electronics 34 (15), 1245 2023
Citations: 6 - Development of solid polymer electrolytes based on poly (ethylene oxide) complexed with 2-trifluoromethyl-4, 5-dicyanoimidazole lithium salt and 1-ethyl-3-methylimidazolium bis
AR Polu, PK Singh, P Siva Kumar, GM Joshi, T Ramesh, IM Noor, ...
High Performance Polymers 35 (1), 4-9 2023
Citations: 6 - CoFe2O4-SiO2 Composites: Preparation and Magneto-Dielectric Properties
T Ramesh, S Bharadwaj, SR Murthy
Journal of Materials 2016 (Article ID 7518468,), 7 pages 2016
Citations: 6 - Structural, vibrational and magnetic properties of Cu-substituted Mn0. 5Zn0. 5Fe2O4 nanoparticles
T Suneetha, GN Rao, T Ramesh
Journal of Materials Science: Materials in Electronics 32 (11), 14420-14436 2021
Citations: 5 - Microwave Hydrothermal Synthesis and Electromagnetic properties of Nanocrystalline Y3-xDyxFe5O12 garnets for microwave antenna applications
T Ramesh, P Raju, RS Shinde, SR Murthy
2015
Citations: 5