Abrupt Emergence of Pressure-Induced Superconductivity of 34 K in SrFe2As2: A Resistivity Study under Pressure

Abstract

We report resistivity measurement under pressure in single crystals of SrFe_2As_2, which is one of the parent materials of Fe-based superconductors. The structural and antiferromagnetic (AFM) transition of T_0 = 198 K at ambient pressure is suppressed under pressure, and the ordered phase disappears above P_c ~ 3.6-3.7 GPa. Superconductivity with a sharp transition appears accompanied by the suppression of the AFM state. T_c exhibits a maximum of 34.1 K, which is realized close to the phase boundary at P_c. This T_c is the highest among those of the stoichiometric Fe-based superconductors.

4 pages, 4 figures, to be published in J. Phys. Soc. Jpn. 78 No.1 (2009)

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Cited by in corpus (11)

• To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
• The Absence of Superconductivity in Single Phase CaFe2As2 under Hydrostatic Pressure
• EuFe${}_2$As${}_2$ under high pressure: an antiferromagnetic bulk superconductor
• Water-induced superconductivity in SrFe2As2
• Antiferromagnetism of SrFe2As2 studied by Single-Crystal 75As-NMR
• Presure-Induced Superconducting State of Antiferromagnetic CaFe${}_2$As${}_2$
• Suppression of antiferromagnetic spin fluctuations in the collapsed tetragonal phase of CaFe2As2
• Microscopic origin of pressure-induced phase transitions in iron-pnictide $AF{e}_{2}A{s}_2$ superconductors: an {ab initio} molecular-dynamics study
• Successive phase transitions under high pressure in FeTe0.92
• The Electronic Phase Diagram of the Iron-based High Tc Superconductor Ba(Fe(1-x)Co(x))2As2 Under Hydrostatic Pressure (0 < x <0.099)
• Multiorbital Effects on Antiferromagnetism in Fe Pnictides