High pressure magnetic state of MnP probed by means of muon-spin rotation

Abstract

We report a detailed $\mu$SR study of the pressure evolution of the magnetic order in the manganese based pnictide MnP, which has been recently found to undergo a superconducting transition under pressure once the magnetic ground state is suppressed. Using the muon as a volume sensitive local magnetic probe, we identify a ferromagnetic state as well as two incommensurate helical states (with propagation vectors $\mathbf{Q}$ aligned along the crystallographic $c-$ and $b-$directions, respectively) which transform into each other through first order phase transitions as a function of pressure and temperature. Our data appear to support that the magnetic state from which superconductivity develops at higher pressures is an incommensurate helical phase.

arXiv comment11 pages, 9 figures

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• Pressure induced magnetic order in FeSe
• Muon spin rotation study of type-I superconductivity: elemental $\beta -$Sn
• Magnetic states of MnP: muon-spin rotation studies
• High-pressure growth and characterization of bulk MnAs single crystals
• First-principles calculations of the magnetic and electronic structures of MnP under pressure
• Exceedingly Small Moment Itinerant Ferromagnetism of Single Crystalline La${}_5$Co${}_2$Ge${}_3$
• Helical magnetic state in the vicinity of the pressure-induced superconducting phase in MnP
• Orbital-dependent charge dynamics in MnP revealed by optical study
• Lattice dynamics in the double-helix antiferromagnet FeP
• Spin Quenching Assisted by a Strongly Anisotropic Compression Behavior in MnP
• Magnetism and its coexistence with superconductivity in CaK(Fe${}_{0.949}$Ni${}_{0.051}$)${}_4$As${}_4$: muon spin rotation/relaxation studies