%0 Journal Article
%T Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation
%A L. Keller
%A J. S. White
%A M. Frontzek
%A P. Babkevich
%A M. A. Susner
%A Z. C. Sims
%A A. S. Sefat
%A H. M. Ronnow
%A Ch. R¨šegg
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevB.91.020409
%X 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) {\mu}B at ambient pressure to 0.4(1) {\mu}B 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.
%U http://arxiv.org/abs/1409.5706v1