Browsing by Author "Sarun, P M"

Analysis of Thermo-magnetic Fluctuations in Bi1.6Pb0.5Sr2−xLuxCa1.1Cu2.1O8+ı (0.000≤x≤0.125) Superconductor

Vinu, S; Sarun, P M; Shabna, R; Syamaprasad, U (Elsevier, 2009)

The effect of substitution of rare-earth Lu on the glass transition temperature (Tg), the temperature and magnetic field dependent activation energy [U0(B,T)] and flux pinning properties of Bi1.6Pb0.5Sr2−xLuxCa1.1Cu2.1O8+ı ...

Charge carrier localization and metal to insulator transition in cerium substituted (Bi,Pb)-2212 superconductor

Shabna, R; Sarun, P M; Vinu, S; Syamaprasad, U (Elsevier, 2010)

We report on the details of carrier localization and metal to insulator transition in (Bi,Pb)-2212 by substituting Ce at its Sr site (0.2 <= x <= 1.0). Structural and compositional analysis confirm good homogeneity of Ce ...

Dissipative flux motion and flux flow resistivity analysis in La-Doped (Bi, Pb)-2212 superconducting ceramics

Vinu, S; Sarun, P M; Shabna, R; Syamaprasad, U (Wiley, 2011)

The dissipation below Tc and the thermally activated energy are analyzed in detail for La-doped (Bi, Pb)-2212 superconductor as a typical case with two analytical methods. The first one is a conventional and generally used ...

Doping Controlled Metal to Insulator Transition in the (Bi, Pb)-2212 System

Shabna, R; Sarun, P M; Vinu, S; Biju, A; Syamaprasad, U (IOP Publishing, 2009-04)

We report on the details of the metal?insulator transition in the Bi1.7Pb0.4Sr2-xPrxCa1.1Cu2.1O8+?system, in the concentration range of x = 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.3 and 1.5. In addition to the electrical ...

Doping Dependent Metal to Insulator Transition in the (Bi, Pb)-2212 System: The Evolution of Structural and Electronic Properties with Europium Substitution

Shabna, R; Sarun, P M; Vinu, S; Syamaprasad, U (IOP Publishing, 2009-09)

The present work investigates the effect of europium substitution on the (Bi, Pb)-2212 system in the concentration range 0.5 ≤ x ≤ 1.0. Phase analysis and lattice parameter calculations on the powder diffraction data and ...

Effect of Dy substitution at the sr site on the critical current density and flux-pinning properties of (Bi, Pb)-2212 superconductor

Vinu, S; Sarun, P M; Shabna, R; Biju, A; Guruswamy, P; Syamaprasad, U (Wiley, 2008)

The effect of substitution of the rare earth Dy on the critical current density and flux-pinning properties of (Bi, Pb)-2212 system prepared by a solid-state synthesis in bulk polycrystalline form was studied. Phase analysis, ...

Effect of sintering temperature on the microstructural and flux pinning characteristics of Bi1.6Pb0.5Sr1.8La0.2Ca1.1Cu2.1O8+delta ceramics

Sarun, P M; Vinu, S; Shabna, R; Biju, A; Guruswamy, P; Syamaprasad, U (Wiley, 2009)

We evaluated the microstructure, superconducting, and flux pinning properties of La-doped (Bi,Pb)-2212 bulk sample by varying its sintering temperature (T-sinter) between 846 degrees and 860 degrees C. Significant variations ...

Effect of Sm addition on (Bi,Pb)-2212 superconductor

Prabitha, V G; Biju, A; Abhilash Kumar, R G; Sarun, P M; Aloysius, R P; Syamaprasad, U (Elsevier Science, 2005)

The effect of Sm addition on the superconducting properties of (Bi,Pb)-2212 system in bulk polycrystalline form was studied. The Sm content was varied from x=0.0 (pure) to 0.5 on a general stoichiometry of Bi1.7Pb0.4Sr2. ...

Effect of Yb, Gd, and Nd substitution at the Sr site on the metal-insulator transition of the (Bi,Pb)-2212 system

Biju, A; Shabna, R; Sarun, P M; Vinu, S; Syamaprasad, U (Wiley, 2010)

Resistivity measurements in the temperature range (64-300 K) were used to study the metal-insulator transition (MIT) driven by a change in the carrier concentration of the Bi(1.7)Pb(0.4)Sr(2)Ca(1.1)Cu(2.1)O(y) [(Bi,Pb)-2212] ...

Enhanced flux pinning of an nd-added (Bi,Pb)-2212 superconductor

Sarun, P M; Biju, A; Guruswamy, P; Syamaprasad, U (Wiley, 2007)

The flux pinning properties of a (Bi,Pb)-2212 superconductor by the addition of a rare-earth element Nd with varying concentrations were studied. The Nd content of the samples was varied from x=0.0 to 0.5 on a general ...

Erratum: Enhancement of critical current density and flux pinning properties of Gd-doped (Bi,Pb)-2212 superconductor (Jl Appl Physics Vol 104, 043905, 2008)

Vinu, S; Sarun, P M; Shabna, R; Syamaprasad, U (American Institute of Physics, 2009)

Flux Pinning Properties of Magnesium Diboride Added (Bi,Pb)-2212 Superconductors

Vinod, K; Abhilash Kumar, R G; Biju, A; Sarun, P M; Syamaprasad, U (Elsevier, 2007-07-31)

Microstructure and flux pinning properties of polycrystalline (Bi,Pb)-2212 system with varying levels (0–0.2 wt.%) of MgB2 was studied. Phase analysis, microstructural investigation and superconducting characterization ...

Highly enhanced flux pinning in Pb and rare earth codoped Bi-2212

Biju, A; Vinod, K; Sarun, P M; Syamaprasad, U (AIP, 2007-01-17)

The effect of codoping of Pb and rare earths rare earths REs =La, Gd, and Yb in Bi-2212 superconductor on structural, transport, and flux pinning properties was investigated in comparison with solo doping of REs. While ...

Highly Enhanced Superconducting Properties of Bi-2212 by Y and Pb Co-doping

Sarun, P M; Shabna, R; Vinu, S; Biju, A; Syamaprasad, U (Elsevier, 2009-05-01)

The effects of Y and Pb co-doping on phase evolution, microstructure, electrical and superconducting properties of Bi-2212 have been studied. The results show that Y3+ ions enter into the crystal structure by replacing ...

Highly enhanced superconducting properties of Eu-doped (Bi,Pb)-2212

Sarun, P M; Vinu, S; Shabna, R; Biju, A; Syamaprasad, U (Elsevier, 2008)

The structural and superconducting properties of Eu-doped (Bi,Pb)-2212 superconductor have been studied. Eu concentration is varied from x=0.0 to 0.4 in a general stoichiometry of Bi1.6Pb0.5Sr2-xEuxCa1.1Cu2.1Oy. It is found ...

Influence of Ho-doping on the electromagnetic field-dependent E-J characteristics of (Bi,Pb)-2212 superconductor

Sarun, P M; Vinu, S; Shabna, R; Biju, A; Guruswamy, P; Syamaprasad, U (IEEE, 2009)

The magnetic field (B) dependence of electric field versus transport current density (E-J characteristics) of Bi(1.6)Pb(0.5)Sr(2-x)Ho(x)Ca(1.1)Cu(2.1)O(8+delta) superconductor was studied for x from 0.000 to 0.200. The ...

Influence of Sintering Temperature on Microstructure, Critical Current Density and Pinning Potential of Superconducting Bi1.6Pb0.5Sr1.8Dy0.2Ca1.1Cu2.1O8þd Ceramics

Vinu, S; Sarun, P M; Shabna, R; Biju, A; Guruswamy, P; Syamaprasad, U (Elsevier, 2009-06)

The influence of sintering temperature on the microstructure, critical current density (JC), pinning potential values (U0) and flux pinning properties of Bi1.6Pb0.5Sr1.8Dy0.2Ca1.1Cu2.1O8+δ superconductor has been investigated. ...

Investigation of Self- and In-field Dependent n-value of Tb-doped (Bi,Pb) - 2212 Superconductor

Sarun, P M; Vinu, S; Shabna, R; Syamaprasad, U (AIP Publishing, 2009)

Knowledge of the electric field versus current density (E-J)(E-J)characteristics is very important for the development of superconducting high-field magnets particularly for operation in the persistent mode. A systematic ...

Microstructural and Superconducting Properties of Yb-substituted (Bi,Pb)-2212 Superconductor Sintered at Different Temperatures

Sarun, P M; Vinu, S; Shabna, R; Biju, A; Syamaprasad, U (Elsevier, 2009-03-20)

The influence of sintering temperature on the microstructure and superconducting properties of Bi1.7Pb0.4Sr1.8Yb0.2Ca1.1Cu2.1O8+δ has been investigated. Yb-free (Bi1.7Pb0.4Sr2.0Ca1.1Cu2.1O8+δ) and Yb-substituted ...

Microstructure and transport properties of Bi1.6Pb0.5Sr2-xLuxCa1.1Cu2.1O8+delta superconductor

Vinu, S; Sarun, P M; Shabna, R; Biju, A; Syamaprasad, U (Elsevier, 2010)

The microstructure and electrical properties of the rare-earth Lu doped (Bi, Pb)-2212 superconductor have been investigated. The Lu concentration is varied from x = 0.000 to 0.150 in a general stoichiometry of Bi1.6Pb0.5 ...

Browsing by Author "Sarun, P M"

Browsing by Author "Sarun, P M"

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