Unique phase diagram with narrow superconducting dome in EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ due to Eu${}^{2+}$ local magnetic moments

Abstract

The interplay between superconductivity and Eu${}^{2+}$ magnetic moments in EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ is studied by electrical resistivity measurements under hydrostatic pressure on $x=0.13$ and $x=0.18$ single crystals. We can map hydrostatic pressure to chemical pressure $x$ and show, that superconductivity is confined to a very narrow range $0.18\le x\le 0.23$ in the phase diagram, beyond which ferromagnetic (FM) Eu ordering suppresses superconductivity. The change from antiferro- to FM Eu ordering at the latter concentration coincides with a Lifshitz transition and the complete depression of iron magnetic order.

4 pages

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Cited by in corpus (8)

• Thermopower as sensitive probe of electronic nematicity in iron pnictides
• Magnetic structure of the Eu2+ moments in superconducting EuFe2(As1-xPx)2 with x = 0.19
• Local and collective magnetism of EuFe${}_2$As${}_2$
• Evolution of the multiband RKKY interaction: Application to iron pnictides and chalcogenides
• Evidence of Spontaneous Vortex Ground State in An Iron-Based Ferromagnetic Superconductor
• Helical structures in layered magnetic superconductors due to indirect exchange interactions mediated by interlayer tunneling
• Interplay of magnetism and superconductivity in EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ single crystals probed by muon spin rotation and ${}^{57}$Fe Mössbauer spectroscopy
• Fluence dependent femtosecond quasi-particle and Eu^{2+} -spin relaxation dynamics in EuFe_{2}(As,P)_{2}