Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation

Abstract

The suppression of magnetic order with pressure concomitant with the appearance of pressure- induced superconductivity was recently discovered in CrAs. Here we present a neutron diffraction study of the pressure evolution of the helimagnetic ground-state towards and in the vicinity of the superconducting phase. Neutron diffraction on polycrystalline CrAs was employed from zero pressure to 0.65 GPa and at various temperatures. The helimagnetic long-range order is sustained under pressure and the magnetic propagation vector does not show any considerable change. The average ordered magnetic moment is reduced from 1.73(2) μB at ambient pressure to 0.4(1) μB close to the critical pressure Pc=0.7 GPa, at which magnetic order is completely suppressed. The width of the magnetic Bragg peaks strongly depends on temperature and pressure, showing a maximum in the region of the onset of superconductivity. We interpret this as associated with competing ground-states in the vicinity of the superconducting phase.

References in corpus (4)

• High-temperature superconductivity in iron-based materials
• Superconductivity in the vicinity of antiferromagnetic order in CrAs
• Superconductivity of 2.2 K under Pressure in Helimagnet CrAs
• Properties of Binary Transition-Metal Arsenides (TAs)

Cited by in corpus (10)

• Interplay between altermagnetism and nonsymmorphic symmetries generating large anomalous Hall conductivity by semi-Dirac points induced anticrossings
• First principles study of structural, magnetic and electronic properties of CrAs
• Spin-orbit coupling effects on the electronic properties of the pressure-induced superconductor CrAs
• Growth of bulk single-crystal MnP helimagnet and its structural and NMR characterization
• Resistivity measurements unveil microscopic properties of CrAs
• Low energy bands and transport properties of chromium arsenide
• Incommensurate magnetic order in rare earth and transition metal compounds with local moments
• Magnetic Phase Diagram of Rouaite, Cu${}_2$(OH)${}_3$NO${}_3$
• Double-helix magnetic order in CrAs with Pnma space group
• Anomalous compressibility behavior of chromium monoaresenide under high pressure