Physics – Condensed Matter – Superconductivity
Scientific paper
2010-12-27
Phys. Rev. B 83, 212502 (2011)
Physics
Condensed Matter
Superconductivity
5 pages, 5 figs
Scientific paper
10.1103/PhysRevB.83.212502
We successfully grew the high-quality single crystals of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs) by self-flux method. Sharp superconducting transition was observed for both types of crystals. The crystals show the onset superconducting transition temperatures ($T_{\rm c}$) of 31 K and 30 K for K- and Cs-compounds, respectively, with nearly 100% shielding fraction. The crystals show quite high resistivity in the normal state of more than 160 m$\Omega$ cm and 1300 m$\Omega$ cm maximum resistivity for $K_{0.86}Fe_2Se_{1.82}$ and $Cs_{0.86}Fe_{1.66}Se_{2}$ single crystals, respectively. Much larger upper critical field $H_{\rm c2}$ is inferred from low-temperature iso-magnetic-field magnetoresistance in these crystals than in FeSe. The anisotropy $H^{ab}_{\rm c2}$(0)/$H^{c}_{\rm c2}$(0) is around 3 for both of the two materials. Anisotropic peculiar magnetic behavior in normal state has been found for $Cs_{0.86}Fe_{1.66}Se_{2}$
Chen Hua-Xing
Cheng Peiling
Liu Hu Ran
Luo X. G.
Wang A. F.
No associations
LandOfFree
Superconductivity and Magnetic Properties of high-quality single crystals of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs) 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 Superconductivity and Magnetic Properties of high-quality single crystals of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Superconductivity and Magnetic Properties of high-quality single crystals of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-22370