Superconducting (Li, Fe)OHFeSe Film of High Quality and High Critical Parameters
ORAL
Abstract
A superconducting film of (Li1-xFex)OHFeSe is reported for the first time. The thin film exhibits a small in-plane crystal mosaic of 0.22o, in terms of the full width at half maximum of X-ray rocking curve, and an excellent out-of-plane orientation by X-ray φ-scan. Its bulk superconducting transition temperature Tc of 42.4 K is characterized by both zero electrical resistance and diamagnetization measurements. The upper critical field Hc2 is estimated to be 79.5 T and 443 T for the magnetic field perpendicular and parallel to the ab plane, respectively. Moreover, a large critical current density Jc of a value over 0.5 MA/cm2 is achieved at ~20 K. Such a (Li1-xFex)OHFeSe film is therefore not only important to the fundamental research for understanding the high-Tc mechanism, but also promising in the field of high-Tc superconductivity application, especially for high-performance electronic devices and large scientific facilities such as superconducting accelerators.
Presenters
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Yu Huang
- National Lab for Superconductivity, Institute of Physics, Chinese Academy of Sciences (CAS)