Interplay between superconductivity and magnetism in K-doped EuFe2As2

Abstract

Superconductivity is found in 50% K-doped EuFe2As2 sample below 33 K. Our results of electrical resistivity, magnetic susceptibility and 57Fe and 151Eu Mossbauer spectroscopy provide clear evidence that the ordering of the Fe moments observed at 190 K in undoped EuFe2As2 is completely suppressed in our 50% K doped sample, thus there is no coexistence between the Fe magnetic order and the superconducting state. However, short range ordering of the Eu moments is coexisting with the superconducting state below 15 K. A bump in the susceptibility well below Tc as well as a slight broadening of the Fe Mossbauer line below 15 K evidence an interplay between the Eu magnetism and the superconducting state.

7 pages, 6 figures

References in corpus (18)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Pressure induced superconductivity in CaFe${}_2$As${}_2$
• Superconductivity up to 29 K in SrFe2As2 and BaFe2As2 at high pressures
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Magnetic and structural transitions in layered FeAs systems: AFe2As2 versus RFeAsO compounds
• High-Temperature Superconductivity in Eu0.5K0.5Fe2As2
• Antiferromagnetic transition in EuFe${}_2$As${}_2$: A possible parent compound for superconductors
• Superconductivity at 53.5 K in GdFeAsO1-delta
• Possible re-entrant superconductivity in EuFe2As2 under pressure
• Electrical Resistivity and Specific Heat of EuFe2As2 Single Crystals: Magnetic homologue of SrFe2As2
• Superconductivity at 34.7 K in the iron arsenide Eu0.7Na0.3Fe2As2
• Effect of pressure on the magnetostructural transition in SrFe2As2
• Magnetic behavior of EuCu2As2: Delicate balance between antiferromagnetic and ferromagnetic order

Cited by in corpus (17)

• Superconductivity in Iron Compounds
• Pressure-induced changes in the magnetic and valence state of EuFe2As2
• Shape of spin density wave versus temperature in AFe2As2 (A=Ca, Ba, Eu): A Mössbauer study
• Antiferromagnetism in EuCu2As2 and EuCu1.82Sb2 Single Crystals
• Interplay between magnetism and superconductivity in EuFe(2-x)Co(x)As2 studied by 57Fe and 151Eu Mössbauer spectroscopy
• Reentrant Superconductivity in Eu(Fe1-xIrx)2As2
• High-resolution angle-resolved photoemission spectroscopy study of the electronic structure of EuFe2As2
• Heavy fermion and Kondo lattice behavior in the itinerant ferromagnet CeCrGe3
• Upper critical magnetic field in K0.83Fe1.83Se2 and Eu0.5K0.5Fe2As2 single crystals
• Doping dependent evolution of magnetism and superconductivity in Eu1-xKxFe2As2 (x = 0-1) and temperature dependence of lower critical field Hc1
• Magnetic fluctuations and superconductivity in Fe pnictides probed by electron spin resonance
• Effect of Ni-doping on magnetism and superconductivity in Eu0.5K0.5Fe2As2
• Magnetism in superconducting EuFe${}_2$As${}_{1.4}$P${}_{0.6}$ single crystals studied by local probes
• 57Fe and 151Eu Mössbauer studies of 3d-4f spin interplay in EuFe(2-x)Ni(x)As2
• Magnetically-controlled Vortex Dynamics in a Ferromagnetic Superconductor
• Competing ferromagnetic superconducting states in europium-based iron pnictides
• Breakdown of the critical state in the ferromagnetic superconductor EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$