K.Q. Ruan

Improvement of the phase formation and superconductivity of the (Bi, Pb) 2Sr2Ca2Cu3Ox silver-sheathed tapes with B2O3 addition

In (Bi,Pb)2Sr2Ca2Cu3Ox silver-sheathed (Bi2223/Ag) tapes, melted liquid phase plays an important role to form the Bi2223 phase. We have added a small amount of B2O3 into Bi2223/Ag tapes to assist in inducing melted phase because B2O3 has a melting point (460°C) much lower than the general sintering temperature of the tapes, and studied the influence of B2O3 doping on the microstructure and critical current density (Jc) of Bi2223/Ag tapes. The results show that B2O3 doping is really effective to result in the faster growth and better alignment of the Bi2223 grains in the superconducting core and improve the magnetic field dependence of the Jc value.

Magnetic and transport properties in layered Nd 1 − x Sr 1 + x CoO 4

Electrical resistance, thermoelectric power, dc magnetization, ac susceptibility, and electron spin resonance (ESR) are investigated for the polycrystalline

The comparable effects on transport properties in Bi2Sr2Ca1−xPrxCu2Oy and Bi2Sr2Ca1−xYxCu2Oy single crystals

{\mathrm{Nd}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{1+x}{\mathrm{CoO}}_{4}

Evidence for spin-glass states and Griffiths singularities in Nd0.75Sr1.25CoO4

(

Superconducting properties of MgB2 wires and tapes with different metal sheaths

x=0.25

Resistivity and thermoelectric power of Bi2Sr2Ca−xPrxCu2Oy system

, 0.33, and 0.60). Powder x-ray diffraction (XRD) confirms that these compounds crystallize in

Doping effect on magnetic and transport properties of Pr2−xSrxCoO4

{\mathrm{K}}_{2}{\mathrm{NiF}}_{4}

Upper critical field and the effect of Li doping on the activation energy in MgB2

-type structure with space group I4/mmm. The specimens exhibit ferromagnetic and semiconducting behaviors. With Sr doping, the lattice parameter

Physical Properties of La0.85K0.15MnO3 in Magnetic Field

c

Transport properties at the insulator–superconductor phase boundary of La2−xSrxCuO4 thin films

increases, the cusp intensity related to spin-glass states weakens, and the ferromagnetic property intensifies. The transport mechanisms in high temperature range obey Arrhenius law and might be understood by small polaron models. The magnetic properties present spin-glass states at