Research in Department of Physics

In Peer-reviewed Journals:

  1. Bejoy, S. Rajesh and V. M. Nandakumaran, Analysis and simulation of semiconductor laser dynamics with optoelectronic delay feedback , Turk. J. Phys.39 (2015) 60
  2. R.Parvathi, Bindu.M.Krishna, S. Rajesh, M.P.John and V.M.Nandakumaran, Hopf Bifurcation in parallel polarized Nd: YAG laser, Chaos, Solitons and Fractals, 42 (2009) 515
  3. R. Parvathi, Bindu M. Krishna, S. Rajesh, M.P. John, V.M. Nandakumaran, Synchronization and control of chaos in coupled chaotic multimode Nd:YAG lasers, Phys. Lett. A 373(2008) 96
  4. Rajesh and Somdatta Sinha, Measuring Collective Behaviour of Multi-Cellular Ensembles: Role of Space-Time Scales, J. Biosci. 33, (2008) 289
  5. Rajesh, Sudeshna Sinha and Somdata Sinha, Synchronization in coupled cells with activator-inhibitor pathways , Phys. Rev. E 75, (2007 ) 011906
  6. S Rajesh and V M Nandakumaran, Control of bistability in a directly modulated semiconductor laser using delayed optoelectronic feedback, Physica D 213 (2006) 11
  7. S Rajesh and V M Nandakumaran, Suppression of chaos in a directly modulated semiconductor laser with delayed optoelectronic feedback, Phys. Lett. A 319 (2003) 340
  8. J M Raj, C Ranganathaiah and S Ganesh, Interfacial modifications in PS/PMMA and PVC/EVA blends by e-beam and microwave irradiation: A free volume study. Polymer Engineering & Science 48 (2008) 1495-1503
  9. J M Raj and C Ranganathaiah, A Free volume study on the Phase modifications brought out by e-beam and microwave irradiation in PP/NBR and PVC/SAN blends. Polymer Degradation & Stability 94 (2009) 397-403
  10. J M Raj and C Ranganathaiah, A New Method of Stabilization and Characterization of the Interface in binary Polymer Blends by irradiation: A Positron Annihilation Study Journal of Polymer Science Part B: Polymer Physics 47 (2009) 619-632
  11. J M Raj, G N Kumaraswamy and C Ranganathaiah, Interfacial Stabilization of binary polymer blends through Radiation treatment: A Free volume study Physica Status Solidi (c) 11 (2009) 2404-2406
  12. J M Raj, C Ranganathaiah and B Kothandaraman, Correlation between Mechanical Properties and Free Volume of Epoxies Modified using three modifiers International Journal of Plastics Technology 11 (2007) 805-818
  13. J M Raj, Abdullah M A M, M N Chandrasekhar, P Ramya, H B Ravikumar and C, A New tool to characterize adhesion at the interface of binary polymer blends: A Free volume study Ranganathaiah Online published in Journal of Polymer Engineering
  14. M K Manjula, K M Lokanatha Rai, J M Raj, C S Manjula, Siddaramaiah and C Ranganathaiah, Microwave assisted improvement in physico-mechanical properties of poly(vinyl alcohol)/poly(ethylene imine)/gelatin blends Journal of Polymer Research 17 (2010) 89-98
  15. Abdullah M A M. Altaweel, C Ranganathaiah, B Kothandaraman, J M Raj and M N Chandrashekara, Characterization of ACS modified epoxy resin composites with fly ash and cenospheres as fillers: Mechanical and microstructural propertie, Polymer Composite 32 (2011) 139-146
  16. Abdullah M A M, J M Raj, M N Chandrasekhar, P Ramya, P Sampathkumaran and C Ranganathaiah, Mechanical and Microstructural properties of Polystyrene based composites: Positron Lifetime Spectroscopic and DSC Studies, Online published in Journal of Polymer Engineering
  17. M G Veena, N M Renukappa, J M Raj, C Ranganathaiah and K N Shivakumar, Characterization of Nano-Silica Filled Epoxy composites for Electrical and Insulating Applications, Journal of Applied Polymer Science 121 (2011) 2752-2760
  18. Ramya, J.M.Raj and C.Ranganathaiah, Hydrodynamic interaction in Binary Polymer Blends measured experimentally from Ortho Positronium lifetime, American Institute of Physics conf proc 1349 (2011) 465-466
  19. P Sampathkumaran, C Ranganathaiah, J M Raj, P K Pujari, P Maheshwari, D Dutta, S Seetharamu and Kishore, Surface and bulk defects in Cr-Mn iron alloy cast in metal and sand moulds: Characterization by Positron annihilation techniques, Journal of Surface Engineered Materials and Advanced Technology 1 (2011) 136-143
  20. P Sampathkumaran, C Ranganathaiah, J M Raj, S Seetharamu and Kishore, Effect of Erosion behavior on the positron lifetime parameters in Cr-Mn irons of different cast section thickness, International Journal of Advanced Engineering Applications, 1 (2013) 108-114
  21. P Ramya, D Meghala, T Pasang, J M Raj, M N Chandrashekhara and C Ranganathaiah, A new insight into interfaces of immiscible binary polymer blends from the free volume approach, Communicated to American Institute of Physics
  22. D Meghala, P Ramya, T Pasang, J M Raj, C Ranganathaiah and J F Williams, Positron Annihilation lifetime study of interfaces in ternary polymer blends, Communicated to Journal of physics: Conference series
  23. P Ramya, D Meghala, T Pasang, J M Raj, C Ranganathaiah and J F Williams, Interface profile studies in immiscible and partially miscible binary polymer blends from free volume measurement, Communicated to Journal of physics: Conference series
  24. Rakhi, R.; Vijayagovindan, G. V.; Indulekha, K., A Cosmological Model with Fermionic Field, International Journal of Modern Physics A, 25 (13), p- 2735-2746 (2010). DOI: 10.1142/S0217751X10049025
  25. Rakhi, R.; Vijayagovindan, G. V.; Indulekha, K., A Cosmological Model with Fermionic Field, International Journal of Modern Physics A, 25 (13), p- 2735-2746 (2010). DOI: 10.1142/S0217751X10049025
  26. Rakhi, R.; Indulekha, K. and Joy, M, Dark Energy and Tracker Solution- A Review, ALFOMINE: Int. Journal (Sciences), 1, p-49-68 (2011)
  27. Rakhi, R. and Indulekha K., Study of the EoS parameter for a cosmological model with Fermionic field and power-law potential, 29th ASI Meeting, ASI Conference Series, 3, p-151 (2011)
  28. Joy, M and Rakhi, R, Primordial non-gaussianity from an anomalous potential, 31st ASI Meeting, ASI Conference Series, 9, p-130 (2013)
  29. Jayakumar, A; Mamgain, A; Jisesh, A.S; Rakhi, R; Mohandas, Saji and Rajagopal, E.N, Evaluation of NCMRWF unified model vertical cloud structure with CloudSat over the Indian summer monsoon region, SPIE Asia-Pacific Remote Sensing; 05/2016
  30. Rakhi, R; Jayakumar, A; Sreevathsa, M.N.R and Rajagopal, E.N, Implementaion and Upgrdation of NCUM in Bhaskara HPC, NMRF/TR/03/2016
  31. George, J.P; Rani, Indira; Jayakumar, A; Mohandas, Saji; Mallik, Swapan; Rakhi, R; Sreevathsa, M.N.R and Rajagopal, E.N, NCUM Data Assimilation System, NMRF/TR/01/2016
  32. Routray, A; Singh, V; Singh, H; Dutta, D; George, J.P; Rakhi R; Evaluation of Different Versions of NCUM Global Model for Simulation of Track and Intensity of Tropical Cyclones over Bay of Bengal, Dynamics of Atmospheres and Oceans (under Review)
  33. Vaisakhan Thampi D. S., Prabhakar Rao Padala, Renju U. A., Influence of Aliovalent Cation substitution on structural and electrical properties of Gd2(Zr1-xMx)2O7-δ (M = Sc, Y) system, RSC Advances, 5,88675 – 88685 (2015)
  34. Vaisakhan Thampi, Prabhakar Rao Padala and A. N. Radhakrishnan, Induced Oxygen vacancies and their effect on the Structural and Electrical properties of a Fluorite-type CaZrO3–Gd2Zr2O7 system, New Journal of Chemistry, 39,1469–1476 (2015)
  35. S. Vaisakhan Thampi, P. Prabhakar Rao and A. N. Radhakrishnan, Influence of Ce substitution on the Order-to-Disorder Structural Transition, Thermal expansion and Electrical properties in Sm2Zr2-xCexO7 system, RSC Advances, 4, 12321–12329 (2014)
  36. Ushakumari A. Renju, Padala Prabhakar Rao and Divakaran S. Vaisakhan Thampi, Influence of phase transition from order to disorder and Philip’s ionicity on the thermal expansion coefficient of pyrochlore type compositions with a multivalent environment, New Journal of Chemistry, 41, 245-255 (2017).
  37. Radhakrishnan, P. Prabhakar Rao, S. K. Mahesh, D. S. Vaisakhan Thampi and Peter Koshy, Role of Bond Strength on the Lattice Thermal Expansion and Oxide Ion Conductivity in Quaternary Pyrochlore Solid Solutions, Inorganic Chemistry, 51, 2409–2419 (2012)
  38. Linda T. Francis, P. Prabhakar Rao, Mariyam Thomas, S.K. Mahesh, V.R.Reshmi, Vaisakhan D.S.Thampi, New orange-red emitting phosphor La3NbO7:Eu3+ under blue excitation, Materials Letters, 81, 142–144 (2012)
  39. Shijina K, George Varghese , Megha U, Surface effects: Tunable bandgap, enhanced fluorescence emission and mesoporosity of novel Cu: ZnNiO nanocomposites, J. luminescence (2016)
  40. Shijina, George Varghese, U.Megha, Correlation of structural,adsorption and optical properties of novel polymer capped Dy:ZnNiO and Ce:ZnNiO nanocomposites , Mater.Sci.Engineer.B 199(2015)125
  41. Shijina K, George Varghese, Megha U, Surface passivation effects on structure, UV and visible emission of ZnNiPdO nanorod, Mater.Sci.Semiconductor processing (34(2015)21
  42. Shijina K, Megha U and George Varghese, Ultraviolet multipeak emissions of monodispersed polymer capped ZnNiO nanoparticles, , Journal of Luminescence 145 (2014) 219-223.
  43. Shijina K, Megha U, George Varghese, Effects of Capping agents on structural, optical and magnetic properties of ZnNiO nanocomposites, , Trans. Nanotechnology 1(2014)
  44. U Megha, K Shijina, George Varghese, Nanosized LaCoFeO4 perovskites synthesized by citrate sol gel auto combustion method, , Proce. Appli. Ceramics 8(2014) 87
  45. Megha U, George Varghese, Shijina K, Effects of Bi &Sr doping on morphological and magnetic properties of LaCoFeO3 nanosized perovskites, Bulletin of material science, 39 (20016)125

Conference Presentations

  1. Rajesh, Oscillations in Complex Systems, DBT Sponsored Seminar on Biophysics, March, 2016, SB College, Changanassery, (Invited Talk on 02-03-2016)
  2. S Rajesh, Effect of bit rate on quality of recovery of chaotically encrypted digital signal, ICQP 2016, International Conference On Quantum Optics and Photonics, St. Teresa’s College, Ernakulam, Kochi, February, 2016
  3. S Rajesh and V. M. Nandakumaran , Stabilization of Quasiperiodic and Chaotic Pulses from a Directly Modulated Self Pulsating Semiconductor Laser, Photonics-2004, International Conference on Fiber optics and Photonics, Kochi, December 2004
  4. S Rajesh and V M Nandakumaran, Control of chaos in directly modulated semiconductor lasers, Photonics-2002, International Conference on Fiber optics and Photonics, Tata Institute of Fundamental Reasearch, Bombay, December 2002
  5. S Rajesh and V M Nandakumaran Synchronization of chaos in unidirectionally coupled modulated self pulsating semiconductor lasers: effects of delay and detuning, Perspectives in Nonlinear Dynamics (PNLD 2004), IIT Madras,Chennai, July 2004
  6. S Rajesh and V M.Nandakumaran, Quasiperiodicity and chaos in directly modulated semiconductor lasers, National Laser Symposium 2002, Sree Chitra Thirunal Institute of Medical Science and Technology Thiruvananthapuram, November 2002.
  7. S Rajesh and V M Nandakumaran Numerical studies on directly modulated semiconductors with delayed optoelectronic feedback, National Conference on Current Advances in Nonlinear Science 2002, Indian Institute of Science, Bangalore, July 2002
  8. V M Nandakumaran and S Rajesh, Synchronization of non autonomous systems: effects of delay and detuning, Perspectives in Nonlinear Dynamics (PNLD 2004), IIT Madras Chennai, July 2004
  9. P U Jijo, M P John, S Rajesh, and V M Nandakumaran, Control of chaos and noise induced instabilities in Duffing oscillator with amplitude modulated feedback, Perspectives in Nonlinear Dynamics (PNLD 2004), IIT Madras Chennai, July 2004
  10. An experimental determination of hydrodynamic interaction parameter: A precursor to miscibility in PVC/EVA blends systems. J M Raj, G N Kumaraswamy and C Ranganathaiah National conference on Emerging trends in Physics, Electronics and Engineering sciences held on 25-26 Sep. 2006 in Mysore.
  11. N. Kumaraswamy, J.M. Raj and C. Ranganathaiah, Influence of SMA compatibilizer on the free volume of PVC/PS blends, National conference on Emerging trends in Physics, Electronics and Engineering sciences held on 25-26 Sep. 2006 in Mysore.
  12. Ranganathaiah, G.N. Kumaraswamy and J.M. Raj, Measurement of hydrodynamic interaction parameter for miscibility test of polymer blends by Positron Lifetime method NUCAR-2007 held at MS University of Baroda, Vadodara in the month of February 2007.
  13. M. Raj, C. Ranganathaiah and S. Ganesh, Phase modifications in PS/PMMA and PVC/EVA blends by E-beam irradiation: A Positron Annihilation study, Swift Heavy Ion workshop-2007 held at IUAC, New Delhi, September 2007
  14. Ranganathaiah, G.N. Kumaraswamy and J.M. Raj, Hydrodynamic interaction as a precursor to miscibility in polymer/polymer blend systems: An experimental determination by Positron Annihilation Lifetime Spectroscopy, International conference ICNP-2007 held at Kottayam, Kerala from 21-22 November 2007
  15. M. Raj, H.B. Ravikumar and C.  Ranganathaiah, Interfacial modifications in PS/PMMA and PVC/EVA blends by microwave Irradiation investigated by Positron Lifetime Spectroscopy 52nd DAE Solid state Physics Symposium held at University of Mysore, Mysore from 26 – 30 December 2007
  16. C. Radha, J.M. Raj and C. Ranganathaiah, Free volume controlled diffusion of sea water and distilled water in an epoxy resin studied by Positron lifetime spectroscopy National Conference on Smart materials and Recent Technologies held at SV University, Tirupati, Andhra Pradesh from 22-24 February 2007
  17. M. Raj, Abdullah M.A.M. Altaweel, M.V. Deepa Urs and C. Ranganathaiah, Phase Modification in PVC/SAN blend by E-Beam and Microwave irradiation investigated by Positron Lifetime Spectroscopy Macro-2008: National conference held at Sri Jayachamarajendra College of Engineering, Mysore from 19-20 May 2008
  18. M. Raj, G.N. Kumaraswamy and C. Ranganathaiah, Interfacial Stabilization of binary polymer blends through radiation treatment: A free volume approach International Conference on Positron Annihilation (ICPA-15) held at Saha Institute of Nuclear Physics, Kolkata from 18-23 January 2009
  19. M. Raj, Abdullah M.A.M, M.N. Chandrasekhar, P. Ramya, H.B.Ravikumar and C. Ranganathaiah , A new tool to characterize adhesion at the interface of binary polymer blends: A Free volume study International Conference on Polymer Processing and Characterization (ICPPC-2010) held at Kottayam, Kerala from 15-17 January 2010
  20. Abdullah M.A.M, M.Raj, M.N. Chandrasekhar, P. Ramya, P. Sampathkumaran and C. Ranganathaiah , Mechanical and Microstructural properties of Polystyrene based composites: Positron Lifetime Spectroscopic and DSC Studies International Conference on Polymer Processing and Characterization (ICPPC-2010) held at Kottayam, Kerala from 15-17 January 2010
  21. Sengupta, S. Mukherjee, I. Kasim, S. Pan, A. Mandal, A.K. Saha, C.Ranganathaiah, J.M. Raj, Variations in Specific Heat and Microstructure of Free Volume in 8.0 MeV Electron Irradiated Amorphous Polystyrene as Studied by Differential Scanning Calorimetry and Positron Lifetime Spectroscopy The Seventeenth National Symposium on Thermal Analysis held at Kurukshetra University from March 9-11,2010
  22. Sengupta, A. Mandal, S. Pan, I. Kasim, S. Mukherjee, A.K. Saha, C. Ranganathaiah, J.M. Raj ,Thermal Analysis and Positron Lifetime Measurements in 8.0 MeV Electron Irradiated Semi Crystalline Polypropylene, The Seventeenth National Symposium on Thermal Analysis held at Kurukshetra University from March 9-11, 2010
  23. Ramya, J.M.Raj and C.Ranganathaiah, Hydrodynamic interaction in Binary Polymer Blends measured experimentally from Ortho Positronium lifetime, 55th DAE Solid State Physics Symposium held at Manipal Institute of Technology, Manipal from 26 – 30 December 2010
  24. Meghala, H.B.Ravikumar, J.M.Raj and C.Ranganathaiah , Characterization of interfaces in ternary polymer blends by Positron Method POLYCON-11 held at Sri Jayachamarajendra College of Engineering, Mysore from 25-26 April 2011
  25. Ramya, D. Meghala, T.Pasang, J.M. Raj, C.Ranganathaiah and J.F. Williams , Measurement of interface widths in immiscible and partially miscible binary polymer blends from o-Ps lifetimes, Positron 2012 to be held at Bhabha Atomic Research Center, Mumbai from 12-14 March 2012
  26. Meghala, P.Ramya, T.Pasang, J.M. Raj and C.Ranganathaiah, Miscibility and interfaces characterization in Ternary Polymer Blends: Free volume study, Positron 2012 to be held at Bhabha Atomic Research Center, Mumbai from 12-14 March 2012
  27. M. Raj and M.N. Chandrashekhar and C. Ranganathaiah, Study of interfaces in Polymer blends and dye molecule diffusion in Human hair using Positron Annihilation Spectroscopy, KSTA Regional Conference on “Science & Technology for Education and Health care” held at JSS College, Ooty road during 21st and 22nd Feb 2014.
  28. Rakhi, A. Jayakumar, Gopal R. Iyengar, Saji Mohandas and E.N. Rajagopal, “Potential Vorticity (PV) Diagnosis of a North Indian Ocean tropical cyclone forecast- a case study”, Dynamics of the Indian Ocean: Perspecive and Retrospective- International Symposium on the Indian Ocean -2015
  29. Rakhi R. and Minu Joy, Non-Gaussianity from inflation with a step in the second derivative of the potential, Primordial Features and Non Gaussianity (2010), Harish Chandra Research Institute, Allahabad
  30. S. Vaisakhan Thampi and P. Prabhakar Rao, Enhanced conductivity in fluorite-type Gd2Zr2O7lattice through doping-induced oxygen vacancies, Presented at International Conference on Science Technology and Applications of Rare Earths (ICSTAR 15) conference held at Thiruvananthapuram on April 23-25, 2015
  31. Vaisakhan Thampi D S, Prabhakar Rao P. and A. N. Radhakrishnan, Influence of CaZrO3 addition on structure and electrical properties of RE2Zr2O7 (RE: Y, Sm), Presented at 25th Kerala Science Congress held at Technopark, Trivandrum on January 30, 2013
  32. Vaisakhan Thampi D S, Prabhakar Rao P. and A. N. Radhakrishnan, Structure and ionic conductivity studies in CaRECeNbO7 system (RE: Gd, Nd, Pr, Sm, Y), Presented at Indian Analytical Science Congress (IASC) held at Kanyakumari on January 27-28, 2012
  33. Vaisakhan Thampi D S, Prabhakar Rao P. and A. N. Radhakrishnan, Aswathy S. Nair, Deepika V. R., Lekshmi U, Oxide ionic conductors in Bi, B and Sb doped Ce8Gd0.2O2 system for fuel cell applications, Presented at Science Technology and Applications of Rare Earths conference (STAR 2011) held at Munnar on August 19-20, 2011
  34. Renju U A, P. Prabhakar Rao, and Vaisakhan Thampi D S, Electrical properties of Gd2Zr2O7-CaTiO3 solid solutions for fuel cell applications, Presented at National Conference on Advanced Technologies for Materials Processing and Diagnostics (ISAS 2014) held at Kochi on September 18-24, 2014.  
  35. Shijina K and George Varghese, Surface passivation effects on fluorescence, adsorption and magnetic properties of ZnNiO nanoparticles , NCMOS, farook college Dec-17-18.
  36. Shijina K and George Varghese, 28th Kerala Science Congress , University of Calicut, Malappuram 28-31 January, 2016