Z. Guguchia, A. Shengelaya, A. Maisuradze, L. Howald, Z. Bukowski, M. Chikovani, H. Luetkens, S. Katrych, J. Karpinski, H. Keller
The magnetic and superconducting properties of EuFe_{2}(As_{1-x}P_{x})_{2} were investigated by means of magnetization and muon-spin rotation (${\mu}$SR) studies as a function of chemical (isovalent substitution of As by P) and hydrostatic pressure. The magnetic phase diagrams of the magnetic ordering of the Eu and Fe spins with respect to P content and hydrostatic pressure are determined. The present investigations reveal that the magnetic coupling between the Eu and the Fe sublattices strongly depends on chemical and hydrostatic pressure. It is found that chemical and hydrostatic pressure have a similar effect on the Eu and Fe magnetic order. Most remarkably, superconductivity is observed in EuFe_{2}(As_{0.88}P_{0.12})_{2} by the application of hydrostatic pressure only. However, superconductivity appears only in a very narrow pressure range of 0.36-0.5 GPa, coexisting with magnetic order of the localized Eu^{2+} moments and the spin-density wave order of the itinerant Fe moments.
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http://arxiv.org/abs/1205.0212
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