Weak anisotropy of the superconducting upper critical field inFe1.11Te0.6Se0.4single crystals

In-plane anisotropy of upper critical field in Sr2RuO4

We investigated the behavior of the spin-triplet superconductor Sr2RuO4 ( T(c) approximately 1.5 K) under the magnetic fields parallel to the quasi-two-dimensional plane. The upper critical field H(c2) exhibits a clear fourfold anisotropy of about 3% at 0.35 K. Furthermore, we detected an additional transition feature below H(c2) in both the ac susceptibility and the specific heat. These second...

Upper Critical Field and Hall effect in superconducting perovskite

Upper critical field H c2 and Hall coefficient R H in superconducting per-ovskite M gCN i 3 have been studied. The normal state ρ(T) behavior is similar to that observed in oxide perovskite (Ba, K)BiO 3 (BKBO), in which ρ(T) fits well curve predicted by Bloch-Grüneisen theory consistently with electron-phonon scattering. H c2 (T), determined from the onset of the resis-tive superconducting tran...

Upper critical field of high-quality single crystals of KFe2As2

Measurements of temperature-dependent in-plane resistivity ρ(T) were used to determine the upper critical field and its anisotropy in high-quality single crystals of the stoichiometric iron arsenide superconductor KFe2As2. The crystals were characterized by the residual resistivity ratio ρ(300 K)/ρ(0) up to 3000 and the resistive transition midpoint temperature Tc=3.8 K, significantly higher th...

Anisotropy of the upper critical field and critical current in single crystal MgB2

Strong anisotropy in nearly ideal tetrahedral superconducting FeS single crystals

Christopher K. H. Borg,1 Xiuquan Zhou,1 Christopher Eckberg,2,3 Daniel J. Campbell,2,3 Shanta R. Saha,2,3 Johnpierre Paglione,2,3 and Efrain E. Rodriguez1,3 1Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA 2Department of Physics, University of Maryland, College Park, Maryland 20742, USA 3Center for Nanophysics and Advanced Materials, Universit...