Muon-spin rotation and magnetization studies of chemical and hydrostatic pressure effects in EuFe_{2}(As_{1-x}P_{x})_{2}

Abstract

The magnetic phase diagram of EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ was investigated by means of magnetization and muon-spin rotation 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 and discussed. 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.

11 pages, 10 figures

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• Probing the quantum phase transition in Mott insulator BaCoS_2 tuned by pressure and Ni-substitution
• Complex vortex-antivortex dynamics in the magnetic superconductor EuFe${}_2$(As${}_{0.7}$P${}_{0.3}$)${}_2$
• 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
• Spin reorientation of the Fe moments in Eu${}_{0.5}$Ca${}_{0.5}$Fe${}_2$As${}_2$: Evidence for a strong interplay of Eu and Fe magnetism