Manjunath Timappa Nayak

@carmelcollegegoa.org

Assistant Professor, Department of Physics
Carmel College of Arts Science and Commerce for Women

Manjunath Timappa Nayak


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https://researchid.co/manjunathscifi

RESEARCH, TEACHING, or OTHER INTERESTS

General Physics and Astronomy, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Acoustics and Ultrasonics
7

Scopus Publications

114

Scholar Citations

4

Scholar h-index

4

Scholar i10-index

Scopus Publications

  • Structures of Iron-Lithium-Calcium-Silicate Glass and its Devitrified State
    Manjunath T. Nayak, J. A. Erwin Desa, P.S.R. Krishna, A.B. Shinde, Margit Fabian, C. Nayak, D. Bhattacharyya, S. N. Jha
    Silicon, 2022
  • Structural studies of potassium silicate glasses with fixed iron content and their relation to similar alkali silicates
    Manjunath T. Nayak, J.A. Erwin Desa, V. Raghvendra Reddy, C. Nayak, D. Bhattacharyya, S.N. Jha
    Journal of Non Crystalline Solids, 2019
  • Effect of iron and sodium inclusion on some properties of silicate glass
    Manjunath T. Nayak, J. A. Erwin Desa, P. D. Babu
    Aip Conference Proceedings, 2019
    Sodium silicate glasses with a fixed molar percentage of iron and varying percentages of sodium alkali have been synthesized by the method of melt quenching in air. The variation of glass transition temperatures Tg in this series can be correlated to the relative fractions of Fe2+ and Fe3+ as well as Na+ ions present in these glasses. UV-Visible spectra showed a trend of optical band gap with Na concentration which is related to the fraction of non-bridging oxygen atoms present in each glass. Magnetization studies showed these glasses to be purely paramagnetic at room temperature but at a temperature of 5K, to have some ferromagnetic character with a ten-fold enhanced magnetization.
  • Structures of silicate glasses with varying sodium and fixed iron contents
    Manjunath T. Nayak, J.A. Erwin Desa, V. Raghvendra Reddy, C. Nayak, D. Bhattacharyya, S.N. Jha
    Journal of Non Crystalline Solids, 2019
  • Roles of iron and lithium in silicate glasses by Raman spectroscopy
    Manjunath T. Nayak, J.A. Erwin Desa
    Journal of Raman Spectroscopy, 2018
    Raman spectroscopy has been used in a qualitative analysis of iron containing lithium silicate glasses. The iron was kept fixed at 8 mol% for all the iron containing samples with varying concentrations of Li2O and SiO2, as this resulted in samples that were fully vitreous in nature. The method of deconvolution of peaks in these data has been employed to understand the relative numbers of Q0, Q1, Q2, Q3, and Q4 silicate structural units. Even though the iron concentration is constant, the linkages of silicate structural units show variation with increasing alkali content. The roles of lithium and iron have been found to be opposed to each other in that the presence of lithium discourages formation of tetrahedral linkages in the structure, whereas iron promotes corner connected tetrahedra or the presence of bridging oxygens.
  • Magnetic properties of Fe-Nd silica glass ceramics
    Manjunath T. Nayak, J. A. Erwin Desa, P. D. Babu
    Aip Conference Proceedings, 2018
    Soda lime silica glass ceramics containing iron and neodymium have been synthesized. The XRD pattern revealed that the glass samples devitrified into multiple phases. Fe2O3 as an initial component converted into Fe3O4 in the sample during the synthesis, and was the main contributor to the magnetic property of the sample. The inclusion of Nd was found to enhance the magnetization of the sample at 5K. The coercivity of the sample increased with decrease in temperature from room to 5K.
  • Magnetic and spectroscopic studies of an iron lithium calcium silicate glass and ceramic
    Manjunath T. Nayak, J.A. Erwin Desa, P.D. Babu
    Journal of Non Crystalline Solids, 2018

RECENT SCHOLAR PUBLICATIONS

  • Structures of Iron-Lithium-Calcium-Silicate Glass and its Devitrified State
    MT Nayak
    Silicon 14 (November 2022), 10337–10345 , 2022
    2022
  • X-ray and SANS study of lithium calcium silicate glasses with Fe2O3
    MT Nayak, JA Desa, PSR Krishna, AB Shinde, D Sen
    Proceedings of the seventh conference on neutron scattering-programme and … , 2021
    2021
  • Effect of iron and sodium inclusion on some properties of silicate glass
    MT Nayak, JAE Desa, P Babu
    DAE Solid State Physics Symposium 2018 2115 (2019), 030224 , 2019
    2019
    Citations: 1
  • Structural studies of potassium silicate glasses with fixed iron content and their relation to similar alkali silicates
    MT Nayak, JAE Desa, V RaghvendraReddy, C Nayak, D Bhattacharyya, ...
    Journal of Non-Crystalline Solids 518 (15 August 2019), 85-91 , 2019
    2019
    Citations: 23
  • Structures of silicate glasses with varying sodium and fixed iron contents
    MT Nayak, JAE Desa, VR Reddy, C Nayak, D Bhattacharyya, SN Jha
    Journal of Non-Crystalline Solids 509, 42-47 , 2019
    2019
    Citations: 24
  • Roles of iron and lithium in silicate glasses by Raman spectroscopy
    MT Nayak, JAE Desa
    Journal of Raman Spectroscopy 50 (6), 1-7 , 2018
    2018
    Citations: 35
  • Magnetic properties of Fe–Nd silica glass ceramics
    MT Nayak, JAE Desa, PD Babu
    DAE Solid State Physics Symposium 2017 1942 (1), 070006-1–070006-4 , 2018
    2018
    Citations: 3
  • Magnetic and spectroscopic studies of an iron lithium calcium silicate glass and ceramic
    MT Nayak, JAE Desa, PD Babu
    Journal of Non-Crystalline Solids 484 (15 March 2018), 1-7 , 2018
    2018
    Citations: 28

MOST CITED SCHOLAR PUBLICATIONS

  • Roles of iron and lithium in silicate glasses by Raman spectroscopy
    MT Nayak, JAE Desa
    Journal of Raman Spectroscopy 50 (6), 1-7 , 2018
    2018
    Citations: 35
  • Magnetic and spectroscopic studies of an iron lithium calcium silicate glass and ceramic
    MT Nayak, JAE Desa, PD Babu
    Journal of Non-Crystalline Solids 484 (15 March 2018), 1-7 , 2018
    2018
    Citations: 28
  • Structures of silicate glasses with varying sodium and fixed iron contents
    MT Nayak, JAE Desa, VR Reddy, C Nayak, D Bhattacharyya, SN Jha
    Journal of Non-Crystalline Solids 509, 42-47 , 2019
    2019
    Citations: 24
  • Structural studies of potassium silicate glasses with fixed iron content and their relation to similar alkali silicates
    MT Nayak, JAE Desa, V RaghvendraReddy, C Nayak, D Bhattacharyya, ...
    Journal of Non-Crystalline Solids 518 (15 August 2019), 85-91 , 2019
    2019
    Citations: 23
  • Magnetic properties of Fe–Nd silica glass ceramics
    MT Nayak, JAE Desa, PD Babu
    DAE Solid State Physics Symposium 2017 1942 (1), 070006-1–070006-4 , 2018
    2018
    Citations: 3
  • Effect of iron and sodium inclusion on some properties of silicate glass
    MT Nayak, JAE Desa, P Babu
    DAE Solid State Physics Symposium 2018 2115 (2019), 030224 , 2019
    2019
    Citations: 1
  • Structures of Iron-Lithium-Calcium-Silicate Glass and its Devitrified State
    MT Nayak
    Silicon 14 (November 2022), 10337–10345 , 2022
    2022
  • X-ray and SANS study of lithium calcium silicate glasses with Fe2O3
    MT Nayak, JA Desa, PSR Krishna, AB Shinde, D Sen
    Proceedings of the seventh conference on neutron scattering-programme and … , 2021
    2021