( An Autonomous Institution of University Grants Commission, New Delhi )
Kinetic arrest of first-order R-3c to Pbnm phase-transition in supercooled LaxMnO3+? (x= 1 & 0.9) Aga Shahee, Dhirendra Kumar, Chandra Shekhar, and N. P. Lalla, J. Phys.: Condens. Matter, 24 225405 (2012)
Pseudogap and charge ordering in a large-bandwidth electron-doped manganiteR. Bindu, Ganesh Adhikary, Nishaina Sahadev, N. P. Lalla, and Kalobaran Maiti, Phys.Rev.B 84, 052407 (2011)
Effect of cobalt substitution on microstructure and magnetic properties in ZnO nanoparticles Chandana Rath , Sonal Singh, P Mallick, D Pandey, N P Lalla and N C Mishra, Indian J.Phys. 83(4) 1-7(2009).
A novel approach towards selective bulk synthesis of few-layer graphenes in an electric arc, Soumen Karmakar, Naveen V Kulkarni, Ashok B Nawale, N. P Lalla, Ratikant Mishra, V G Sathe, S V Bhoraskar and A K Das, J. Phys. D: Appl. Phys. 42 115201 (2009)
Synthesis and Characterization of Ag-Polymer Nanocomposites, Y. K. Mishra, S. Mohapatra, V. S. K. Chakravadhanula, N. P. Lalla, V. Zaporojtchenko, D. K. Avasthi, and F. Faupel Journal of Nanoscience and Nanotechnology Vol.9, 1-5 (2009).
Thickness dependent effect of swift heavy ion irradiation in W/Ni superlattice Multilayers ,Sharmistha Bagchi1, F Singh, D K Avasthi and N P Lalla1, J. Phys. D: Appl. Phys. 42, 145414 (2009).
Unambiguous evidence of wurtzite phase in capped CdS quantum dots S.K.Gautam, D.Pandey,S.N.Upadhya, Shahid Anwar, and N.P.Lalla, Solid state commun. 146 425-427(2008).
Phase evolution in 57Fe/Al multilayers studied through DC magnetization, Conversion electron Mössbauer spectroscopy and transmission electron microscopy, Snehal Jani, Varkey Sebastian, N. Lakshmi, V.R. Reddy, K. Venugopalan1, Ajay Gupta and N. P. Lalla J. Appl. Phys. 104, 123907 (2008)
Cross-sectional transmission electron microscopic study of irradiation induced nano-crystallization of nickel in a W/Ni multilayer Sharmistha Bagchi and N P Lalla J. Phys.: Condens. Matter 20 235202 (2008).
Strain induced first-order orbital flip transition and coexistence of Charge-orbital ordered phases in Pr0.5Ca0.5MnO3 P. R. Sagdeo, N. P. Lalla , A.V.Narlikar, D. Prabhakaran and A. T. Boothroyd ,Phys. Rev.B 78, 174106. (2008)
Transmission electron microscopic study of the long period modulated phase in the morphotropic phase-boundary of (1-x)NaNbO3-xCaTiO3 for x=0.16. S.Tripathi, N.P.Lalla and D. Pandey, Appl. Phys. L ett. 93 232903 (2008).
Occurrence of a new superlattice phase across the antiferroelectric phase transition in Sr1-xCaxTiO3 (x=0.30 and 0.40) Shahid Anwar and N. P. Lalla J. Phys.: Condens. Matter 20 325231 (2008).
Space-group analysis of Sr1-xCaxTiO3 ceramics for x= 0.20, 0.27 & 0.30 through Electron diffraction. Shahid Anwar and N. P. Lalla: Journal of Phys: Cond. Mat. 19, 436210 (2007).
Strain induced coexistence of monoclinic and charge ordered phases in La1-xCax MnO3, P.R. Sagdeo, Shahid Anwar and N. P. Lalla, Phys. Rev.B , Vol: 74, 214118(2006).
200 KV, W & LaB6 filament
Resolution Point 2.04Å
Side mount and bottom mount CCD Cameras
Single tilt Low Background
Double-tilt Low-temperature (100K)
Double tilt High-Temperature (1000K)
EDAX Boron and higher
Normal and Cross Sectional sample preparation facility. Ion-Beam thinning
(Thin samples of ceramics, like manganite, multiferroics and ferroelectrics can be prepared)
This TEM facility can be successfully used for structural and microstructural analysis of nano (powder) semiconductors like ZnO, CdS, ZnS and similar materials, and bulk ceramics samples like manganites. The facility of non-ambient sample conditions like low and high temperatures can be exploited to study important physics of current interest in strongly correlated materials like manganites and ferroelectric/antiferroelectrics through phase transition studies using electron diffraction and imaging. To get a feel of the type of work following references may be see.