Publications (8)
One-step atmospheric pressure synthesis of the ground state of Fe based LaFeAsO1-d superconductor
V. P. S. Awana, Arpita Vajpayee, Monika Mudgel +6
We report an easy and versatile one-step route of synthesis for newly discovered Fe based superconductor LaFeAsO1-d with d = 0.0 to 0.15. Instead of widely used high-pressure-high-…
Stochastic interference in a dispersive nonlinear optical fiber system
Shiva Kumar, Jing Shao
Stochastic power fluctuation in a fiber optic system due to the interplay among dispersion, nonlinearity and partial coherence of the source is investigated. An analytical expressi…
The role of Ca in superconducting and magnetic properties of Y1-xCaxBa2Cu3O7 (x = 0.0-0.30)
N. P. Liyanawaduge, Anuj Kumar, Shiva Kumar +2
We report the structural, superconducting, magnetic and granular properties of Y1-xCaxBa2Cu3O7; x = 0.0, 0.1, 0.2 and 0.3. Rietveld fitted X-ray diffraction data confirms the singl…
Magneto-transport and magnetic susceptibility of SmFeAsO1-xFx (x = 0.0 and 0.20)
R. S. Meena, Anand Pal, Shiva Kumar +2
Bulk polycrystalline samples, SmFeAsO and the iso-structural superconducting SmFeAsO0.80F0.20 are explored through resistivity with temperature under magnetic field Ï(T, H), AC an…
Synthesis and superconductivity of CeNi0.8Bi2: New entrant in superconductivity kitchen?
Anuj Kumar, Shiva Kumar, Rajveer Jha +1
CeNi0.8Bi2 is very recent entrant in superconductivity kitchen [1], and the same seeks reproduction from other groups. We report synthesis, structural details and superconductivity…
Analysis of Nonlinear Phase Noise in Coherent Fiber-Optic Systems Based on Phase Shift Keying
Shiva Kumar
Analytical expressions for the phase variance in a nonlinear fiber optic system based on phase-shift keying are developed. The Gauss-Hermite functions are used as the orthogonal ba…