Magnetization and neutron scattering studies of the pressure effect on the magnetic transition in Er0.57Y0.43Co2

A. Podlesnyak; Th Strässle; A. Mirmelstein; A. Pirogov; R. Sadykov

doi: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

A. Podlesnyak, Th Strässle, A. Mirmelstein, A. Pirogov, R. Sadykov

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6 Scopus citations

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 ∂T_c/∂p ∼ -0.4 K/kbar. The values of the magnetic moments of the Er and the Co ions are found μ_Er = 5.40 ± 0.15 μ_B/atom, μ_Co = 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 T_c and for a coexistence short-and long-range order below T_c down to 4 K.

Original language	English
Pages (from-to)	547-552
Number of pages	6
Journal	Zeitschrift für Physik B Condensed Matter
Volume	29
Issue number	4
DOIs	https://doi.org/10.1140/epjb/e2002-00338-y
State	Published - Oct 2 2002
Externally published	Yes

Keywords

75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)

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10.1140/epjb/e2002-00338-y

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title = "Magnetization and neutron scattering studies of the pressure effect on the magnetic transition in Er0.57Y0.43Co2",

abstract = "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 4f (Er) and itinerant 3d (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 ∂Tc/∂p ∼ -0.4 K/kbar. The values of the magnetic moments of the Er and the Co ions are found μEr = 5.40 ± 0.15 μB/atom, μCo = 0.50 ± 0.07μB/atom and 5.35 ± 0.15μB/atom, 0.37 ± 0.09μB/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.",

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author = "A. Podlesnyak and Th Str{\"a}ssle and A. Mirmelstein and A. Pirogov and R. Sadykov",

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T1 - Magnetization and neutron scattering studies of the pressure effect on the magnetic transition in Er0.57Y0.43Co2

AU - Podlesnyak, A.

AU - Strässle, Th

AU - Mirmelstein, A.

AU - Pirogov, A.

AU - Sadykov, R.

PY - 2002/10/2

Y1 - 2002/10/2

N2 - 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 4f (Er) and itinerant 3d (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 ∂Tc/∂p ∼ -0.4 K/kbar. The values of the magnetic moments of the Er and the Co ions are found μEr = 5.40 ± 0.15 μB/atom, μCo = 0.50 ± 0.07μB/atom and 5.35 ± 0.15μB/atom, 0.37 ± 0.09μB/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.

AB - 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 4f (Er) and itinerant 3d (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 ∂Tc/∂p ∼ -0.4 K/kbar. The values of the magnetic moments of the Er and the Co ions are found μEr = 5.40 ± 0.15 μB/atom, μCo = 0.50 ± 0.07μB/atom and 5.35 ± 0.15μB/atom, 0.37 ± 0.09μB/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.

KW - 75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)

KW - 75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)

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JO - Zeitschrift für Physik B Condensed Matter

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

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