Different effect of quenching temperature on Fe1+σTe0.5Se0.5 and β-FeSe | Zendy

Zhongnan Guo | Zendy; Huanhuan Zhang | Zendy; Bingling Han | Zendy; Xiaojing Feng | Zendy; Wenxia Yuan | Zendy

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Different effect of quenching temperature on Fe1+σTe0.5Se0.5 and β-FeSe

Author(s) -

Zhongnan Guo,

Huanhuan Zhang,

Bingling Han,

Xiaojing Feng,

Wenxia Yuan

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4908228

Subject(s) - materials science , quenching (fluorescence) , work (physics) , nanotechnology , thermodynamics , fluorescence , physics , quantum mechanics

In this work, we have demonstrated a different effect on Fe1+σTe0.5Se0.5 and β-FeSe by changing the quenching temperature. Tc is clearly reduced in Fe1+σTe0.5Se0.5 after increasing the quenching temperature from 300 °C to 500 °C, while that of β-FeSe is almost unchanged. Structure refinement indicates that after quenched at 500 °C, FeTe4 tetrahedron exhibits an expansion with the stretched Fe-Te bond, together with the increased amount of interstitial iron. These particular changes on structure are believed to be responsible for the suppression of superconductivity in Fe1+σTe0.5Se0.5

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