Transport properties of the new Fe-based superconductor KxFe2Se2 (Tc = 33 K)
Yoshikazu Mizuguchi, Hiroyuki Takeya, Yasuna Kawasaki, Toshinori, Ozaki, Shunsuke Tsuda, Takahide Yamaguchi, Yoshihiko Takano
TL;DR
This paper reports the synthesis and characterization of a new Fe-based superconductor K0.8Fe2Se2 with a transition temperature of 33 K, high upper critical field, and moderate anisotropy, highlighting its potential for high-field applications.
Contribution
The study introduces a new Fe-based superconductor K0.8Fe2Se2 with detailed superconducting properties, including high critical field and anisotropy measurements.
Findings
Superconducting transition at 33 K
High upper critical field of 192 T
Anisotropy of ~3.6
Abstract
We synthesized the new Fe-based superconductor K0.8Fe2Se2 single crystals. The obtained single crystal exhibited a sharp superconducting transition, and the onset and zero-resistivity temperature was estimated to be 33 and 31.8 K, respectively. A high upper critical field of 192 T was obtained. Anisotropy of superconductivity of K0.8Fe2Se2 was ~3.6. Both the high upper critical field and comparably low anisotropy are advantageous for the application under high magnetic field.
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