Magnetization and specific heat of UCo0.95T0.05Al (T = Fe, Ni) single crystals

A. V. Andreev; B. Janoušová; V. Sechovský; Y. Homma; Y. Shiokawa

doi:10.1023/A:1014448519010

Magnetization and specific heat of UCo_0.95T_0.05Al (T = Fe, Ni) single crystals

A. V. Andreev, B. Janoušová, V. Sechovský, Y. Homma, Y. Shiokawa

IMR - Materials Processing and Characterization Division

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

Abstract

We present the first single-crystal study of Fe and Ni doped U(Co₁-_xT_x)Al compounds in comparison to the parent compound, the itinerant 5f-electron metamagnet UCoAl. Magnetization and specific-heat data measured in the temperature range of (1.8-300) K and in fields up to 10 T are analyzed and discussed. Both compounds exhibit a strong uniaxial anisotropy with the dominating magnetic response along the c-axis of the hexagonal ZrNiAl-type structure. Ni substitution yields an increase of the critical field for metamagnetism; UCo_0.95Fe_0.05Al is ferromagnetic below 30K. Temperature evolution of the entropy change between 0 and 10 T points to involvement of magnetic correlations or spin fluctuations in the paramagnetic compounds UCoAl and UCo_0.95Ni_0.05Al.

Original language	English
Pages (from-to)	275-278
Number of pages	4
Journal	Czechoslovak Journal of Physics
Volume	52
Issue number	2
DOIs	https://doi.org/10.1023/A:1014448519010
Publication status	Published - 2002 Feb

Keywords

Metamagnetism
Spin fluctuations
UCoAl

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title = "Magnetization and specific heat of UCo0.95T0.05Al (T = Fe, Ni) single crystals",

abstract = "We present the first single-crystal study of Fe and Ni doped U(Co1-xTx)Al compounds in comparison to the parent compound, the itinerant 5f-electron metamagnet UCoAl. Magnetization and specific-heat data measured in the temperature range of (1.8-300) K and in fields up to 10 T are analyzed and discussed. Both compounds exhibit a strong uniaxial anisotropy with the dominating magnetic response along the c-axis of the hexagonal ZrNiAl-type structure. Ni substitution yields an increase of the critical field for metamagnetism; UCo0.95Fe0.05Al is ferromagnetic below 30K. Temperature evolution of the entropy change between 0 and 10 T points to involvement of magnetic correlations or spin fluctuations in the paramagnetic compounds UCoAl and UCo0.95Ni0.05Al.",

keywords = "Metamagnetism, Spin fluctuations, UCoAl",

author = "Andreev, {A. V.} and B. Janou{\v s}ov{\'a} and V. Sechovsk{\'y} and Y. Homma and Y. Shiokawa",

note = "Funding Information: This research has been supported by the Ministry of Education of the Czech Republic ( project # MSM113200002) and the Grant Agency of the Czech Republic ( Grant # 202/99/0184).",

year = "2002",

month = feb,

doi = "10.1023/A:1014448519010",

language = "English",

volume = "52",

pages = "275--278",

journal = "Czechoslovak Journal of Physics",

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publisher = "Springer Netherlands",

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TY - JOUR

T1 - Magnetization and specific heat of UCo0.95T0.05Al (T = Fe, Ni) single crystals

AU - Andreev, A. V.

AU - Janoušová, B.

AU - Sechovský, V.

AU - Homma, Y.

AU - Shiokawa, Y.

N1 - Funding Information: This research has been supported by the Ministry of Education of the Czech Republic ( project # MSM113200002) and the Grant Agency of the Czech Republic ( Grant # 202/99/0184).

PY - 2002/2

Y1 - 2002/2

N2 - We present the first single-crystal study of Fe and Ni doped U(Co1-xTx)Al compounds in comparison to the parent compound, the itinerant 5f-electron metamagnet UCoAl. Magnetization and specific-heat data measured in the temperature range of (1.8-300) K and in fields up to 10 T are analyzed and discussed. Both compounds exhibit a strong uniaxial anisotropy with the dominating magnetic response along the c-axis of the hexagonal ZrNiAl-type structure. Ni substitution yields an increase of the critical field for metamagnetism; UCo0.95Fe0.05Al is ferromagnetic below 30K. Temperature evolution of the entropy change between 0 and 10 T points to involvement of magnetic correlations or spin fluctuations in the paramagnetic compounds UCoAl and UCo0.95Ni0.05Al.

AB - We present the first single-crystal study of Fe and Ni doped U(Co1-xTx)Al compounds in comparison to the parent compound, the itinerant 5f-electron metamagnet UCoAl. Magnetization and specific-heat data measured in the temperature range of (1.8-300) K and in fields up to 10 T are analyzed and discussed. Both compounds exhibit a strong uniaxial anisotropy with the dominating magnetic response along the c-axis of the hexagonal ZrNiAl-type structure. Ni substitution yields an increase of the critical field for metamagnetism; UCo0.95Fe0.05Al is ferromagnetic below 30K. Temperature evolution of the entropy change between 0 and 10 T points to involvement of magnetic correlations or spin fluctuations in the paramagnetic compounds UCoAl and UCo0.95Ni0.05Al.

KW - Metamagnetism

KW - Spin fluctuations

KW - UCoAl

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U2 - 10.1023/A:1014448519010

DO - 10.1023/A:1014448519010

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SN - 0011-4626

VL - 52

SP - 275

EP - 278

JO - Czechoslovak Journal of Physics

JF - Czechoslovak Journal of Physics

IS - 2

ER -

Magnetization and specific heat of UCo_0.95T_0.05Al (T = Fe, Ni) single crystals

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Keywords

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