In-plane upper critical field anisotropy inSr2RuO4andCeIrIn5

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...

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

The upper critical field and its anisotropy in ( Li 1 − x Fe x ) OHFe 1 −

The temperature dependence of the upper critical field (Hc2) in a (Li1−xFex)OHFe1−ySe single crystal (T 40 c≈ K) has been determined by means of magnetotransport measurements down to 1.4 K both for inter-plane (H c ∥ , H c c2 // ) and in-plane (H ab ∥ , H ab c2 // ) field directions in static magnetic fields up to 14 T and pulsed magnetic fields up to 70 T. H c c2 // exhibits a quasilinear incr...

Orbital upper critical field and its anisotropy of clean one- and two-band superconductors.

The Helfand-Werthamer (HW) scheme (Helfand and Werthamer 1966 Phys. Rev. 147 288; another part of this work published as a separate paper by Werthamer et al 1966 Phys. Rev. 147 295) of evaluating the orbital upper critical field is generalized to anisotropic superconductors in general, and to two-band clean materials, in particular. Our formal procedure differs from those in the literature; it ...

Upper critical field in anisotropic superconductors.

Anisotropic superconductivity has been studied in a variety of one-dimensional, ' intercalated, s and artificially prepared" " systems. Much of the experimental work in these systems is related to measurements of the temperature and angular dependence of the upper critical fields H, 2. In many cases, the experiments determine the critical field at which surface superconductivity nucleates, i.e....