Eur. Phys. J. B 29, 547-552 (2002)
https://doi.org/10.1140/epjb/e2002-00338-y

Magnetization and neutron scattering studies of the pressure effect on the magnetic transition in Er_0.57Y_0.43Co₂

¹ Laboratory for Neutron Scattering, ETH Zürich & Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
² Institute for Metal Physics RAS, 620219 Ekaterinburg GSP-170, Russia
³ Vereshchagin High-Pressure Physics Institute RAS, 142092 Troitsk, Moscow region, Russia

Corresponding author: ^a andrew.podlesnyak@psi.ch

Received: 20 December 2001
Revised: 12 June 2002
Published online: 31 October 2002

Abstract

Neutron powder diffraction was employed to study the pressure effect on the magnetic transition in the pseudobinary Laves-phase compound Er_0.57Y_0.43Co₂ and to determine the magnetic moments of the Er- and Co-subsystems. Our studies reveal that the onset of long-range magnetic order for both the localized 4f (Er) and itinerant 3d (Co) electron moments appears at about the same temperature at ambient pressure. The pressure effect on T_c is found to be negative and equal for both sublattices, namely  K/kbar. The values of the magnetic moments of the Er and the Co ions are found /atom, /atom and /atom, /atom, for p=0 and 6 kbar, respectively. Our experimental results give evidence for short-range magnetic order formation at temperatures already above T_c and for a coexistence short- and long-range order below T_c down to 4 K.