Dr. Sagar. S

Department : Physics

Designation : Associate Professor
Academic Qualifications : M.Sc (Kerala University), Ph.D (CUSAT)
Email : sagargcw@gmail.com
Phone : 9846676513
Contact Address : ‘Kailasam’, Chittimukku, Kallayam TVPM, Pin 695043

List of journal publications  

  1. ‘The influence of Ti doping at the Mn site on structural, magnetic, and magnetocaloric properties of Sm0.6Sr0.4MnO3’, A Anand, M Manjuladevi, RK Veena, VS Veena, YS Koshkid’ko, S  Sagar, Journal of Solid State Chemistry 305, 122712 (2022)
  2. ‘An investigation on the effect of Ti doping at the Mn site on structural magnetic and  magnetocaloric properties of Nd0.5Ca0.5MnO3 ’A Anand, M Manjuladevi, RK Veena, VS Veena,  YS Koshkid’ko, S Sagar, Materials Research Bulletin 145, 111512 (2022)  
  3. ‘Investigations on Optical and Magnetodielectric Properties of Lead-Free Multiferroic  Bi0.9La0.1FeO3 and its Composite (0.9) Bi0.9La0.1FeO3/ (0.1) La0.7Sr0.3MnO3 at Room  Temperature’ MM Devi, A Anand, RK Veena, VS Veena, S Bharadwaj, S Sagar  Journal of Superconductivity and Novel Magnetism 34, pages 2999–3010 (2021)  
  4. ‘On the magnetic and magnetoelectric coupling properties of lead-free (1 − x)  Bi0.9La0.1FeO3/xLa0.7Sr0.3MnO3 (x = 0, 0.1, 0.2) composites at room temperature’  MM Devi, A Anand, RK Veena, VS Veena, K Nandakumar , S Sagar  

Journal of Materials Science: Materials in Electronics 33( 2021 )  

  1. ‘Investigations on structural, ferroic and magneto-dielectric properties of multiferroic  Bi0.9 Sm0.1 Fe O3 and its composite (0.9) Bi0.9 Sm0.1 FeO 3/(0.1) La 0.7 Sr 0.3 MnO3’ MM Devi, A Anand, RK Veena, VS Veena, S Bharadwaj, S Sagar, Journal of Materials Science: Materials in  Electronics 32 (9), 2021, pages 11640-11648 
  2. ‘A study on the thermopower and resistivity properties of Ti doped manganites  Gd0.7Sr0.3Mn1-xTixO3 (x = 0, 0.1 and 0.15) ’A Anand, M Manjuladevi, RK Veena, VS Veena,  S Sagar, Materials Today: Proceedings 47(2021) 1829-1834  
  3. ‘Dielectric and magnetoelectric coupling properties of Lead-free (1-x) Bi0.9Sm 0.1FeO 3/  (x) La0.7 Sr0.3 MnO3 (x = 0, 0.05, 0.1) composites at room temperature’ MM Devi, A Anand,  RK Veena, VS Veena, K Nandakumar, S Sagar, Materials Today: Proceedings 47(2021) 1755-1759
  4. ‘A study on spin memory, nature of magnetic transition, and magnetocaloric effect in  Nd0. 5Ca0. 5MnO3’ A Anand, M Manjuladevi, RK Veena, VS Veena, YS Koshkid’ko, S Sagar   Journal of Magnetism and Magnetic Materials 528, 167810, 2021  
  5. ‘A study on the magnetocaloric effect in Ti doped manganites Gd0. 7Sr0.3Mn1− xTixO3 (x = 0, 0.1 and 0.15)’ A Anitha, RK Veena, M Manjuladevi, VS Veena, YS Koshkid’ko, S Sagar   Journal of Magnetism and Magnetic Materials 471, 537-543, 2019  
  6. ‘Dielectric properties and conductivity of (ZnO/CdO) mixed oxide nanocomposite’  PP Sharmila, RM Sebastain, S Sagar, EM Mohammed, NJ Tharayil , Ferroelectrics 474 (1), 144-155, 2015 
  7. ‘On magnetic ordering in heavily sodium substituted hole doped lanthanum manganites’   N Sethulakshmi, AN Unnimaya, IA Al-Omari, S Al-Harthi, S Sagar, …Journal of Magnetism and Magnetic   Materials 391, 75-82, 2015  
  8. ‘Effect of annealing on optical and antimicrobial properties of zinc oxide nanoparticles’   PP Sharmila, S Sagar, NJ Tharayil, Nano Science and Nano Technology An Indian Journal 8 (8), 312 – 319,   2014  
  9. ‘On the conduction mechanism in the paramagnetic phase of Gd based manganites’   S Sagar, MR Anantharaman, Bulletin of Material Science 35 (1), 41 – 45, 2012  
  10. ‘Colossal thermoelectric power in Gd-Sr manganites’  S Sagar, V Ganesan, PA Joy, S Thomas, A Liebig, M Albrecht, ….. MR Anantharaman EPL 91 (1),   17008, 2010
  1. ‘Multiferroic Behavior of Gd Based Manganite’  S Sagar, PA Joy, MR Anantharaman, Ferroelectrics 392 (1), 13-19, 2009
  2. ‘Mechanism of ac conduction in nanostructured manganese zinc mixed ferrites’   EV Gopalan, KA Malini, S Sagar, DS Kumar, Y Yoshida, IA Al-Omari, … MR Anantharaman   Journal of Physics D Applied Physics 42 (16), 5005, 2009  
  1. ‘Dielectric studies of nanocrystalline nickel–cobalt oxide’ NJ Tharayil, S Sagar, R Raveendran,  AV Vaidyan Physica B: Condensed Matter 399 (1), 1-8, 2007  
  2. ‘Evidence for the existence of multiple equilibrium states in cobalt phthalocyanine  tetramer: a study by dielectric spectroscopy’ S Sagar, S Saravanan, SS Kumar, S Venkatachalam,  MR Anantharaman Journal of Physics D Applied Physics 39 (8), 1678, 2006 
Research Scholars :

1.) AnithaAnand,
2.) R.K.Veena,
3.) M.Manjuladevi,
4.) V.S.Veena

‘A study on the magnetocaloric effect in Ti doped manganites Gd0.7Sr0.3Mn1−xTixO3 (x = 0, 0.1 and 0.15)’ AnithaAnand, R.K.Veena, M.Manjuladevi, V.S.Veena, Yuri S.Koshkid’ko, S.Sagar Journal of Magnetism and Magnetic Materials 471, 537-543 [2019]

‘Dielectric properties and conductivity of (ZnO/CdO) mixed oxide nanocomposite’ PP Sharmila, RM Sebastain, S Sagar, EM Mohammed, NJ Tharayil, Ferroelectrics 474 (1), 144-155 [2015]

‘On magnetic ordering in heavily sodium substituted hole doped lanthanum manganites’, N Sethulakshmi, AN Unnimaya, IA Al-Omari, S Al-Harthi, S Sagar Journal of Magnetism and Magnetic Materials 391, 75-82 [2015]

‘Effect of annealing on optical and antimicrobial properties of zinc oxide nanoparticles’, PP Sharmila, S Sagar, NJ Tharayil Nano Science and Nano Technology An Indian Journal 8 (8), 312 – 319 [2014]

‘On the conduction mechanism in the paramagnetic phase of Gd based manganites’, S Sagar, MR Anantharaman Bulletin of Material Science 35 (1), 41 – 45 [2012]

‘Colossal thermoelectric power ID Gd- Sr manganites’, S. Sagar, V. Ganesan, P. A. Joy, Senoy Thomas, A. Liebig, M. Albrecht and M. R. Anantharaman, EPL 91 (2010) 17008.
‘Multiferroic properties of Gd based manganites’; S Sagar, P. A Joy and M. R Anantharaman, Ferroelectrics 392 (2009) 13-19.

‘Mechanism of ac conduction m nano structured manganese zinc mixed ferrites’, E Veena Gopalan, K. A. Malini, S. Sagar, D Sakthi Kumar, Yasuhiko Yoshida, I. A AI-Omari and M. R Anantharaman, J. Phys. D: Appl. Phys. 42 (2009) 165005.

‘Dielectric studies of nano crystalline nickel – cobalt oxide’, Nisha J. Tharayil, S. Sagar, R. Raveendran and A. V Vaidyan, Physica B: Condensed Matter 399 (2007) 1-8.

‘Evidence for the existence of multiple equilibrium states in cobalt phthalocyanine tetramer: a study by dielectric spectroscopy’, S Sagar, S Saravanan, S Suresh Kumar, S Venkatachalam and M. R Anantharaman, J. Phys. D: Appl.Phys.39 (2006) 1678-1683

project details

1. UGC Minor research project “Investigations of the Multiferroic Properties of Ti doped Gadolinium Strontium Manganite” UGC letter No. MRP(S) – 254/12 – 13/ KLKE014/UGC –SWRO dated 29/03/2013