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Browsing by Author "Aswathy, P M"

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Influence of rare earth doping on the structural and electro-magnetic properties of SmFeAsO0.7F0.3 iron pnictide

Anooja, J B; Aswathy, P M; Neson varghese; Chandrakanth, C H; Devendra kumar, N; Sundaresan, A; Syamaprasad, U (Royal Society of Chemistry, 2015-08-01)

The effects of rare earth site doping on the structural, superconducting and magnetic properties of SmFeAsO0.7F0.3 iron pnictide are investigated. Gd3+ and Ce3+ ions are chosen by virtue of their position being on either ...
Microstructural refinement and enhanced transport properties in binary doped NdFeAsO superconductor

Aswathy, P M; Anooja, J B; Neson Varghese; Syamaprasad, U (American Institute of Physics, 2014)

We report the synthesis of Nd1 xCaxFeAsO1 2xF2x superconductors using CaF2 as a binary dopant that provides both holes and electrons by simultaneous substitution of Ca2þ ions and F ions at Nd3þ and O2 sites, respectively. ...
NdFeAsO1-xFx superconductor - impact of fluorine variation on microstructure and transport properties

Aswathy, P M; Anooja, J B; Syamaprasad, U (Wiley, 2013)

Polycrystalline samples of NdFeAsO1xFx (Nd1111) with x=0, 0.1, 0.2, 0.3, and 0.4 were synthesized using a solid-state method at ambient pressures. A maximum transition temperature (TC) of 52.0K and a JC of 1050A/cm2 at 12K ...
A novel low temperature synthesis route for SmFeAsO1−xFx bulk superconductor with improved transport properties

Anooja, J B; Aswathy, P M; Sarun, P M; Syamaprasad, U (Elsevier, 2012-02-15)

Polycrystalline bulk samples of SmFeAsO1−xFx with 0 ≤x≤0.4 are synthesized at a temperature as low as 850 ◦C using a partially reacted precursor. The temperature dependence of resistivity and ac susceptibility measurements ...
Rare Earth (RE - Ce, Gd) Modified Nd1-Xrexfeaso0.7F0.3 Superconductor with Enhanced Magneto-Transport Properties

Aswathy, P M; Anooja, J B; Varghese, N; Chandrakanth, C K; Kumar, N D; Sundaresan, A; Syamaprasad, U (Royal society of chemistry, 2015)

The influence of rare earth (RE – Ce, Gd) doping at the Nd site in the NdFeAsO0.7F0.3 superconductor wherein Ce and Gd have ionic radii in the order Ce > Nd > Gd is investigated. The structural and superconductivity ...
The role of Yttrium doping on the structural and superconducting properties of Sm1111 and its comparison with other (RE, Y)1111 (RE La, Ce, and Nd) Iron Oxypnictides

Aswathy, P M; Anooja, J B; Neson Varghese; Syamaprasad, U (Springer/ Plenum Publishers, 2015)

The role of yttrium doping on the structural and superconducting properties of SmFeAsOF (Sm1111) is studied in detail and is compared with other yttrium-doped RE1111 (RE-rare earth) iron oxypnictide superconductors on the ...
SmFeAsO superconductor with preferred crystallographic orientation and enhanced critical current density

Anooja, J B; Aswathy, P M; Neson Varghese; Aloysius, R P; Syamaprasad, U (American Ceramic Society, 2014)

The effect of combined substitution of Sm3+ and O2− with Ca2+ and F−, respectively, on the structural and superconducting properties of SmFeAsO system is investigated. It is observed that the binary doping using CaF2 causes ...
Structural and transport properties of the (Bi1.6Pb0.5)(Sr2-xLux)Ca1.1Cu2.1O8+delta Superconductor

Sarun, P M; Vinu, S; Shabna, R; Anooja, J B; Aswathy, P M; Syamaprasad, U (IEEE, 2010)

The effects of Lu-doping on phase evolution, microstructure, electrical, and superconducting properties of Bi-2212 have been studied. The results show that Lu+3 ions enter into the crystal structure in place of Sr+2 ions ...

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