Anand Pal

Synthesis and physical properties of FeSe1/2Te1/2 superconductor

One of the most important properties of very recently reported FeSe based superconductors is the robustness of their superconductivity under applied magnetic field. The synthesis and control of superconductivity in FeSe based compounds is rather a difficult task. Synthesis and physical property characterization for optimized superconductivity of FeSe1/2Te1/2 at 13 K is reported here. The compound crystallized in a tetragonal structure with lattice parameters a=3.8015(2) and c=6.0280(4) A. Magnetization measurements indicated bulk superconductivity with lower critical field (Hc1) of around 180 Oe. By applying Ginzburg–Landau theory, the Hc2(0) value is estimated to be ∼1840 kOe for the 90% of resistive transition. A heat capacity measurement revealed bulk superconductivity by a hump at Tc near 13 K and an expected decrease in the same was observed under an applied magnetic field.

Magnetic phase transitions in SmCoAsO

Magnetization, x-ray diffraction, and specific-heat measurements reveal that SmCoAsO undergoes three magnetic phase transitions. A ferromagnetic transition attributed to the Co ions, emerges at

Superconductivity and thermal properties of sulphur doped FeTe with effect of oxygen post annealing

{T}_{C}=57\text{ }\text{K}

Synthesis of SmFeAsO by an easy and versatile route and its physical property characterization

with a small saturation moment of

Superconductivity in SmFe1−xCoxAsO (x=0.0–0.30)

\ensuremath{\sim}0.15\text{ }{\ensuremath{\mu}}_{B}/\text{Co}

High field (14 T) magneto transport of Sm/PrFeAsO

. Reorientation of the Co moment to an antiferromagnetic state is obtained at

Intriguing complex magnetism of Co in RECoAsO (RE=La, Nd, and Sm)

{T}_{N2}=45\text{ }\text{K}

Complex magnetism and magneto-transport of RECoPO (RE = La, Nd, and Sm)

. The relative high paramagnetic effective moment

Anomalous heat capacity and x-ray photoelectron spectroscopy of superconducting FeSe1/2Te1/2

{P}_{\text{eff}}=1.57\text{ }{\ensuremath{\mu}}_{B}/\text{Co}

Anomalous magnetism of Pr in PrCoAsO

indicates an itinerant ferromagnetic state of the Co sublattice. The third magnetic transition at