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EuFe2(As1−xPx)2: Reentrant Spin Glass and Superconductivity

S. Zapf, H. S. Jeevan, T. Ivek, F. Pfister, F. Klingert, S. Jiang, D. Wu, P. Gegenwart, R. K. Kremer, M. Dressel

DOI 10.1103/PhysRevLett.110.237002 · Physical Review Letters

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Abstract

By systematic investigations of the magnetic, transport, and thermodynamic properties of single crystals of EuFe2(As1−xPx)2 (0≤x≤1), we explore the complex interplay of superconductivity and Eu2+ magnetism. Below 30 K, two magnetic transitions are observed for all P substituted crystals, suggesting a revision of the phase diagram. In addition to the canted A-type antiferromagnetic order of Eu2+ at ∼20 K, a spin glass transition is discovered at lower temperatures. Most remarkably, the reentrant spin glass state of EuFe2(As1−xPx)2 coexists with superconductivity around x≈0.2.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
EuFe2(As1-xPx)2

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22Pressure not reportedonset
EuFe2(As0.835P0.165)2

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22Pressure not reportedonset

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