Origin of the Higher-Tc Phase in the KxFe2−ySe2 System
Crystal (programming language)
Texture (cosmology)
Transition temperature
DOI:
10.7566/jpsj.85.044710
Publication Date:
2016-03-31T01:26:21Z
AUTHORS (10)
ABSTRACT
Single crystals of KxFe2−ySe2 are prepared by quenching at various temperatures. The obtained higher temperatures have a surface morphology with mesh-like texture. They show sharp superconducting transition Tc ∼ 32 K large shielding volume fraction. On the other hand, without an onset ∼44 and zero resistivity approximately ∼33 K, they possess island-like regions on larger amount Fe incorporation. In situ high-temperature single-crystal X-ray diffraction measurements tell us Fe-vacancy-ordered phase is generated temperature region around 270 °C via iron diffusion. generation this may become driving force for growth higher-Tc phase. superconductivity attributed to metallic no vacancy.
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