EUASFEO0.85F0.15 SUPERCONDUCTIVITY AND MAGNETIC CHARACTERISTICS

Abstract

EuAsFeO0.85F0.15 with a critical temperature Tc 11K was synthesised in a solid-state synthesis process. In magnetic fields ranging from 0.1 to 140000 Oe, its electric and magnetic characteristics have been studied. Magnetic penetration depths and coherence lengths have been determined by measuring critical magnetic fields Hc1 and Hc2. At low temperatures, the temperature dependency Hc2 (T) shows evident hyperbolic-like behaviour. It was found that compounds doped with rare-earth elements that have tiny atomic radii had higher than average concentrations of Tc and Hc2. The PACS score is 74.70. Ads * Please use the following address for any correspondence: dmitriev@ilt.kharkov.ua. Special properties of rare-earth metals, include superconductivity and magnetism