11 papers
Effects of high-pressure synthesis on phase formation and superconducting properties of PrFeAsO1-xFx
Priya Singh, Konrad Kwatek, Tatiana Zajarniuk +3
Motivated by recent reports of enhanced superconducting performance in several families of iron-based superconductors (IBS) processed by high-pressure (HP) synthesis, we investigat…
Tuning Superconductivity by Isovalent Antimony Substitution in PrFeAs(O,F)
Priya Singh, Konrad Kwatek, Tatiana Zajarniuk +6
We investigate the effects of isovalent Sb substitution at the As site in fluorine-doped PrFeAs1-xSbxO0.7F0.3 (x = 0 to 1.0) through structural, Raman spectroscopy, density functio…
Effect of Mn Substitution on Superconductivity in PrFeAs(O,F): Role of Magnetic Impurities
Priya Singh, Konrad Kwatek, Tatiana Zajarniuk +5
We investigate Mn substitution at the Fe site in PrFe1-xMnxAsO0.7F0.3 (0 to 0.1) using structural, Raman, density functional theory (DFT), transport, and magnetic measurements. X-r…
Fluorine-substitution-dependent phase diagram and superconducting properties of Sm-based oxypnictides synthesized by a high-pressure growth technique
Mohammad Azam, Tatiana Zajarniuk, Ryszard Diduszko +5
A series of SmFeAsO1-xFx (Sm1111) bulk samples (x = 0.05 to 0.40) are synthesized by an in-situ cubic-anvil high-pressure technique at 4 GPa and systematically characterized throug…
Complete electronic phase diagram and enhanced superconductivity in fluorine-doped PrFeAsO1-xFx
Priya Singh, Konrad Kwatek, Tatiana Zajarniuk +4
Establishing a complete electronic phase diagram for REFeAsO (RE = rare earth, RE1111) ironbased superconductors has remained experimentally challenging. Here, we report a systemat…
Enhancement of the superconducting transition temperature in Mn-doped CaKFe4As4 processed by the high gas-pressure and high-temperature synthesis method
Manasa Manasa, Mohammad Azam, Tatiana Zajarniuk +4
A series of Mn-doped CaKFe4As4 samples, CaK(Fe1-xMnx)4As4 with x values of 0, 0.005, 0.01, 0.02, 0.03, 0.04, and 0.05, are synthesized using two distinct routes: conventional synth…