Electronic properties of UCoAl0.75Sn0.25 single crystal

A. V. Andreev; F. Honda; V. Sechovský; S. El-Khatib; A. M. Alsmadi; H. Nakotte; A. H. Lacerda

doi:10.1016/j.jallcom.2003.11.130

Electronic properties of UCoAl_0.75Sn_0.25 single crystal

A. V. Andreev, F. Honda, V. Sechovský, S. El-Khatib, A. M. Alsmadi, H. Nakotte, A. H. Lacerda

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A single crystal of the UCoAl_0.75Sn_0.25 quasiternary compound has been grown and studied by measuring the magnetization, specific heat and electrical resistivity at various temperatures and magnetic fields. Similar to the parent compounds UCoAl and UCoSn, the magnetization of their solid solution exhibits uniaxial anisotropy with a strong magnetic response along the c-axis and a weak and nearly temperature independent paramagnetic signal in the basal plane. The evolution of the c-axis magnetization isotherms, as well as the anomalies in the temperature dependence of the specific heat and resistivity point to ferromagnetism in UCoAl_0.75Sn_0.25 below T_C≈5.5K. The low value of the spontaneous magnetic moment, poor saturation of the magnetization, the pronounced negative magnetoresistance with increasing magnetic field and the temperature and magnetic field dependence of specific heat provide indications of strong fluctuations of the U magnetic moment also in the ferromagnetic state.

Original language	English (US)
Pages (from-to)	67-71
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	375
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2003.11.130
State	Published - Jul 28 2004
Externally published	Yes

Bibliographical note

Funding Information:
The work is a part of the research program MSM113200002, which is financed by the Ministry of Education of the Czech Republic. We acknowledge also the support of the Czech Grant Agency under the grant number 202/02/0739. It was also partly supported by a grant from NSF (grant number: DMR-0094241). Work at the National High Magnetic Field Laboratory was performed under the auspices of the NSF, the US Department of Energy and the State of Florida.

Keywords

Ferromagnetism
Magnetic anisotropy
Magnetoresistivity
Specific heat
UTX compounds
Uranium intermetallics

Publisher link

10.1016/j.jallcom.2003.11.130

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title = "Electronic properties of UCoAl0.75Sn0.25 single crystal",

abstract = "A single crystal of the UCoAl0.75Sn0.25 quasiternary compound has been grown and studied by measuring the magnetization, specific heat and electrical resistivity at various temperatures and magnetic fields. Similar to the parent compounds UCoAl and UCoSn, the magnetization of their solid solution exhibits uniaxial anisotropy with a strong magnetic response along the c-axis and a weak and nearly temperature independent paramagnetic signal in the basal plane. The evolution of the c-axis magnetization isotherms, as well as the anomalies in the temperature dependence of the specific heat and resistivity point to ferromagnetism in UCoAl0.75Sn0.25 below TC≈5.5K. The low value of the spontaneous magnetic moment, poor saturation of the magnetization, the pronounced negative magnetoresistance with increasing magnetic field and the temperature and magnetic field dependence of specific heat provide indications of strong fluctuations of the U magnetic moment also in the ferromagnetic state.",

keywords = "Ferromagnetism, Magnetic anisotropy, Magnetoresistivity, Specific heat, UTX compounds, Uranium intermetallics",

author = "Andreev, {A. V.} and F. Honda and V. Sechovsk{\'y} and S. El-Khatib and Alsmadi, {A. M.} and H. Nakotte and Lacerda, {A. H.}",

note = "Funding Information: The work is a part of the research program MSM113200002, which is financed by the Ministry of Education of the Czech Republic. We acknowledge also the support of the Czech Grant Agency under the grant number 202/02/0739. It was also partly supported by a grant from NSF (grant number: DMR-0094241). Work at the National High Magnetic Field Laboratory was performed under the auspices of the NSF, the US Department of Energy and the State of Florida.",

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doi = "10.1016/j.jallcom.2003.11.130",

language = "English (US)",

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AU - Andreev, A. V.

AU - Honda, F.

AU - Sechovský, V.

AU - El-Khatib, S.

AU - Alsmadi, A. M.

AU - Nakotte, H.

AU - Lacerda, A. H.

N1 - Funding Information: The work is a part of the research program MSM113200002, which is financed by the Ministry of Education of the Czech Republic. We acknowledge also the support of the Czech Grant Agency under the grant number 202/02/0739. It was also partly supported by a grant from NSF (grant number: DMR-0094241). Work at the National High Magnetic Field Laboratory was performed under the auspices of the NSF, the US Department of Energy and the State of Florida.

PY - 2004/7/28

Y1 - 2004/7/28

N2 - A single crystal of the UCoAl0.75Sn0.25 quasiternary compound has been grown and studied by measuring the magnetization, specific heat and electrical resistivity at various temperatures and magnetic fields. Similar to the parent compounds UCoAl and UCoSn, the magnetization of their solid solution exhibits uniaxial anisotropy with a strong magnetic response along the c-axis and a weak and nearly temperature independent paramagnetic signal in the basal plane. The evolution of the c-axis magnetization isotherms, as well as the anomalies in the temperature dependence of the specific heat and resistivity point to ferromagnetism in UCoAl0.75Sn0.25 below TC≈5.5K. The low value of the spontaneous magnetic moment, poor saturation of the magnetization, the pronounced negative magnetoresistance with increasing magnetic field and the temperature and magnetic field dependence of specific heat provide indications of strong fluctuations of the U magnetic moment also in the ferromagnetic state.

AB - A single crystal of the UCoAl0.75Sn0.25 quasiternary compound has been grown and studied by measuring the magnetization, specific heat and electrical resistivity at various temperatures and magnetic fields. Similar to the parent compounds UCoAl and UCoSn, the magnetization of their solid solution exhibits uniaxial anisotropy with a strong magnetic response along the c-axis and a weak and nearly temperature independent paramagnetic signal in the basal plane. The evolution of the c-axis magnetization isotherms, as well as the anomalies in the temperature dependence of the specific heat and resistivity point to ferromagnetism in UCoAl0.75Sn0.25 below TC≈5.5K. The low value of the spontaneous magnetic moment, poor saturation of the magnetization, the pronounced negative magnetoresistance with increasing magnetic field and the temperature and magnetic field dependence of specific heat provide indications of strong fluctuations of the U magnetic moment also in the ferromagnetic state.

KW - Ferromagnetism

KW - Magnetic anisotropy

KW - Magnetoresistivity

KW - Specific heat

KW - UTX compounds

KW - Uranium intermetallics

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