Physics – Condensed Matter – Superconductivity
Scientific paper
2008-07-28
PRB 78, 220505 (2008)
Physics
Condensed Matter
Superconductivity
published version
Scientific paper
10.1103/PhysRevB.78.220505
The radio frequency penetration depth was measured in the superconductor (Ba$_{0.55}$K$_{0.45}$)Fe$_{2}$As$_{2}$ under pulsed magnetic fields extending to 60 tesla and down to 14 K. Using these data we are able to infer a $H_{c2}(T)$, $H-T$ phase diagram, for applied fields parallel and perpendicular to the crystallographic c-axis. The upper critical field curvature is different for the respective orientations but they each remain positive down to 14 K. The upper critical field anisotropy is moderate, $\approx 3.5$ close to $T_c$, and drops with the decrease of temperature, reaching $\approx 1.2$ at $14 K$. These data and analysis indicate that (i) (Ba$_{0.55}$K$_{0.45}$)Fe$_{2}$As$_{2}$ anisotropy diminishes with temperature and has an unusual temperature dependence, (ii) $H_{c2} (T=0)$ for this compound may easily approach fields of 75 tesla.
Altarawneh Moaz. M.
Bud'ko Sergey L.
Canfield Paul. C.
Collar K.
Mielke C. H.
No associations
LandOfFree
Determination of anisotropic Hc2 up to 60 T in (Ba0.55K0.45)Fe2As2 single crystals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Determination of anisotropic Hc2 up to 60 T in (Ba0.55K0.45)Fe2As2 single crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of anisotropic Hc2 up to 60 T in (Ba0.55K0.45)Fe2As2 single crystals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-313577