Browsing Department of Physics by Title

Crystal Structure, Magnetic Structure and Magnetic Properties of (Nd, K)-Mn-O and (Nd, Na)-Mn-O based Manganites

Samantaray, Biswanath (2011)

Colossal magnetoresistive oxides, one of the amazing classes of materials have been the subject of research for more than a decade, due to their fascinating electrical and magnetic properties and, their potential applications ...

Cylindrical Quantum Dots Spin Qubits and Decoherence

Mathew, Agile (2014)

The broad area of this research work comes under semiconductor quantum dots and quantum computation...

Density functional theory studies of Fe and Mn substituted CoCr2O4

Das, Debashish (2017)

Spinel compound CoCr2O4 is found to be a promising multiferroic material as it exhibits switchable electric polarization under reversal of magnetic field. In a bid to enhance the functional properties of CoCr2O4 , recent ...

Deposition of La-Mn-O and Nd-Mn-O based thin films and study of their electrical transport and magnetic properties

Gopalrao, T. Rangandha (2017)

In the present thesis, the structural, electrical and magnetic properties of Nd0.7Sr0.3MnO3 (NSMO) and Nd0.8Na0.2MnO3 (NNMO) films as well as bilayers of NSMO/NNMO and La0.7Sr0.3MnO3/LaFeO3 (LSMO/LFO) are presented. Single ...

Development of a Laser Scanning Confocal Microscope with Programmably Switchable Vector Beam Illumination

Kalita, Ranjan (2020)

The laser scanning confocal microscope (LSCM) has become as a popular imaging tool for a wide range of investigations, particularly in biological and biomedical sciences, due to the ability of imaging thin slices of the ...

Development of a new class of enhanced kinetic sampling methods for biomolecular simulations

Ghosh, Susmita (2018)

Gaining a detailed insight into the molecular kinetics of the biomolecular systems is the fundamental step to comprehend the human health. In the present thesis, our focus is on the development of a new class of enhanced ...

Development of a zonal wavefront sensor with enhanced performance using a reconfigurable array of binary diffraction gratings

Pathak, Biswajit (2017)

The Shack Hartmann wavefront sensor (SHWS) is a widely used zonal wavefront sensor, named after Johannes Franz Hartmann and Roland Shack. It consists of a 2D array of micro-lenses called lenslets along with a detector ...

Development of Bulk and Thin Films of Mg2TiO4 B ased Ceramics for Microwave Applications

Bhuyan, Ranjan Kumar (2015)

In the present thesis work, we have prepared single phase Mg 2 TiO 4 ceramics by mechanical a nd solid - state reaction methods. The effect of vari ous additives, their concentrations and processing parameters on crystal ...

Development of grating array based zonal wavefront sensor for in-situ surface profiling during the growth of the thin film in a deposition system

Kumar, Nagendra (2022)

In this thesis, a novel grating array based wavefront sensing (GAWS) scheme is proposed and demonstrated experimentally which can be used to measure both the thickness and surface profiles of the thin films simultaneously ...

Development of Optical Sectioning Microscope using Binary Di raction Hologram

Das, Abhijit (2014)

An optical microscope is an imaging instrument that is used to view the features of an object, which can not be seen with an unaided eye, by illuminating the object with visible light. Based on the illumination type, optical ...

Dielectric and magnetic properties of Fe and Ti based perovskite oxides

Deka, Bipul (2017)

The present PhD thesis deals with extensive investigation of magnetic and dielectric properties of (1) YFe1-xMnxO3 (x = 0 to 0.3), (2) Bi1-xSmxFeO3 (x = 0 to 0.3), (3) PbTi1-xFexO3 (x = 0 to 0.3) and (4) BaTi1-xFexO3 (x = ...

Dielectric and magnetic studies of wide-bandgap Mott insulators and their composites

Joshi, Deep Chandra (2018)

High-permittivity magneto-dielectric materials and their composites have drawn a tremendous attraction in recent past due to their versatile applications such as in piezoelectric transducers, low-power CMOS devices, sensors ...

Dielectric studies on Ba5Nb4O15-BaWO4 bulk and thin films

Kumar, Anil C. (2017)

In the current thesis work, dielectric resonators (DRs) of Ba5Nb4O15 and BaWO4 ceramics have been prepared using mechanical alloying method and semi - alkoxide precursor (sol - gel) method. The Ba5Nb4O15 - BaWO4 composite ...

Diffraction Management by using Coherent control fields in Optical Media

Verma, Onkar Nath (2014)

Optical diffraction of laser beam from finite size of conventional optical devices imposes a fundamental limitations for the creation and detection of sub wave length images.

Discontinuous percolation transition: Search for new models and scaling theory

Roy, Bappaditya (2017)

Percolation has long served as a model for diverse phenomena. The percolation transition is known as one of the most robust continuous geometrical phase transitions. However, in the recent past, a series of new models with ...

Disorder and spin imbalance induced exotic phases in weakly coupled s-wave superconductors

Dey, Poulumi (2011)

The first part of our work deals with a smooth crossover from a Bardeen Cooper Schrieffer (BCS) phase comprising of largely overlapping pairs to a Bose superfluid (BEC) with short ranged tightly bound pairs induced by a ...

Effect of Aberrations on Tightly Focused Cylindrical Vector beams

Gaffar, Md; Gaffar, Md (2016)

Cylindrical vector beams have axially symmetric polarization profiles or electric field orientations in the pupil plane. Two important members of cylindrical vector beams are the radially polarized and the azimuthally ...

Effect of perturbation and mixing of different species on the collective behaviour of self-propelled particles

Adhikary, Sagarika (2022)

Active matter or self-propelled particles (SPPs) are characterised by their inherent ability to consume energy from the environment and eventually drive themselves out of equilibrium. Bacteria swarms, cell clusters, insects, ...

Electrical and thermal transport through spin-orbit coupled nano-junctions : An emphasis on Graphene based junction devices

Kapri, Priyadarshini (2018)

The thesis investigates electrical and heat transport in spin-orbit coupled normal-superconductor and normal-insulator-superconductor based junction devices via a modified version of the Blonder - Tinkham - Klapwijk (BTK) ...

Electrical Resistivity And Ac Susceptibility Studies In Perovskite Manganites

Kar, Manoranjan (2004)

Materials based on manganese oxides are generally known as manganites. The manganites RMnO3 (R= Trivalent rare earth elements) and AMnO3 (A= Divalent alkaline earth elements) are known to be insulating with antiferromagnetic ...

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