Magnetization and neutron scattering studies of the pressure effect on the magnetic transition in Er $\scriptstyle \sf0.57$ Y $\scriptstyle \sf0.43$ Co $\scriptstyle \sf 2$

Autor: Andrey Podlesnyak, R. Sadykov, A.V. Mirmelstein, A. N. Pirogov, Th. Strässle
Rok vydání: 2002
Předmět:
Zdroj: The European Physical Journal B - Condensed Matter. 29:547-552
ISSN: 1434-6036
1434-6028
DOI: 10.1140/epjb/e2002-00338-y
Popis: Neutron powder diffraction was employed to study the pressure effect on the magnetic transition in the pseudobinary Laves-phase compound Er0.57Y0.43Co2 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 4 f (Er) and itinerant 3 d (Co) electron moments appears at about the same temperature at ambient pressure. The pressure effect on Tc is found to be negative and equal for both sublattices, namely T c / p ∼ - 0.4 K/kbar. The values of the magnetic moments of the Er and the Co ions are found = 5.40±0.15μ B /atom, = 0.50±0.07μ B /atom and 5.35±0.15μ B /atom, 0.37±0.09μ B /atom, for p = 0 and 6 kbar, respectively. Our experimental results give evidence for short-range magnetic order formation at temperatures already above Tc and for a coexistence short- and long-range order below Tc down to 4 K.
Databáze: OpenAIRE
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