Onset of ferromagnetism in the 5f-band metamagnet UCoAl upon partial dilution of the U sublattice

A. V. Andreev; V. Sechovský; D. Rafaja; L. Dobiášová; Y. Homma; Y. Shiokawa

doi:10.1016/S0925-8388(00)00875-6

Onset of ferromagnetism in the 5f-band metamagnet UCoAl upon partial dilution of the U sublattice

A. V. Andreev, V. Sechovský, D. Rafaja, L. Dobiášová, Y. Homma, Y. Shiokawa

Materials Processing and Characterization Division

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

14 Citations (Scopus)

Abstract

UCoAl is a 5f-band metamagnet. The U_1-xR_xCoAl solid solutions with R=Lu and Y exhibit ferromagnetism for low R content. The spontaneous magnetic moment reaches a maximum value of 0.09 μ_B and 0.21 μ_B at x=0.06 for R=Lu and Y, respectively, and vanishes at x≥0.15. The evolution of crystal structure parameters together with magnetism are compared for U_1-xLu_xCoAl, U_1-xY_xCoAl and also for UCoAl_1-xX_x (X=Ga, In, Sn). It is concluded that the linear changes of lattice dimensions rather that the unit cell volume play a principal role in determining the ground state properties of UCoAl related compounds. The decrease of the c/a ratio in these materials correlates with the transformation from the metamagnetic to a ferromagnetic state.

Original language	English
Pages (from-to)	77-81
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	307
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(00)00875-6
Publication status	Published - 2000 Jul 14

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0925-8388(00)00875-6

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title = "Onset of ferromagnetism in the 5f-band metamagnet UCoAl upon partial dilution of the U sublattice",

abstract = "UCoAl is a 5f-band metamagnet. The U1-xRxCoAl solid solutions with R=Lu and Y exhibit ferromagnetism for low R content. The spontaneous magnetic moment reaches a maximum value of 0.09 μB and 0.21 μB at x=0.06 for R=Lu and Y, respectively, and vanishes at x≥0.15. The evolution of crystal structure parameters together with magnetism are compared for U1-xLuxCoAl, U1-xYxCoAl and also for UCoAl1-xXx (X=Ga, In, Sn). It is concluded that the linear changes of lattice dimensions rather that the unit cell volume play a principal role in determining the ground state properties of UCoAl related compounds. The decrease of the c/a ratio in these materials correlates with the transformation from the metamagnetic to a ferromagnetic state.",

author = "Andreev, {A. V.} and V. Sechovsk{\'y} and D. Rafaja and L. Dobi{\'a}{\v s}ov{\'a} and Y. Homma and Y. Shiokawa",

note = "Funding Information: The work is supported by grant #202/99/0184 of Grant Agency of the Czech Republic and grant #A1010018 of Grant Agency of Academy of Sciences of the Czech Republic.",

year = "2000",

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doi = "10.1016/S0925-8388(00)00875-6",

language = "English",

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T1 - Onset of ferromagnetism in the 5f-band metamagnet UCoAl upon partial dilution of the U sublattice

AU - Andreev, A. V.

AU - Sechovský, V.

AU - Rafaja, D.

AU - Dobiášová, L.

AU - Homma, Y.

AU - Shiokawa, Y.

N1 - Funding Information: The work is supported by grant #202/99/0184 of Grant Agency of the Czech Republic and grant #A1010018 of Grant Agency of Academy of Sciences of the Czech Republic.

PY - 2000/7/14

Y1 - 2000/7/14

N2 - UCoAl is a 5f-band metamagnet. The U1-xRxCoAl solid solutions with R=Lu and Y exhibit ferromagnetism for low R content. The spontaneous magnetic moment reaches a maximum value of 0.09 μB and 0.21 μB at x=0.06 for R=Lu and Y, respectively, and vanishes at x≥0.15. The evolution of crystal structure parameters together with magnetism are compared for U1-xLuxCoAl, U1-xYxCoAl and also for UCoAl1-xXx (X=Ga, In, Sn). It is concluded that the linear changes of lattice dimensions rather that the unit cell volume play a principal role in determining the ground state properties of UCoAl related compounds. The decrease of the c/a ratio in these materials correlates with the transformation from the metamagnetic to a ferromagnetic state.

AB - UCoAl is a 5f-band metamagnet. The U1-xRxCoAl solid solutions with R=Lu and Y exhibit ferromagnetism for low R content. The spontaneous magnetic moment reaches a maximum value of 0.09 μB and 0.21 μB at x=0.06 for R=Lu and Y, respectively, and vanishes at x≥0.15. The evolution of crystal structure parameters together with magnetism are compared for U1-xLuxCoAl, U1-xYxCoAl and also for UCoAl1-xXx (X=Ga, In, Sn). It is concluded that the linear changes of lattice dimensions rather that the unit cell volume play a principal role in determining the ground state properties of UCoAl related compounds. The decrease of the c/a ratio in these materials correlates with the transformation from the metamagnetic to a ferromagnetic state.

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JO - Journal of Alloys and Compounds

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ER -

Onset of ferromagnetism in the 5f-band metamagnet UCoAl upon partial dilution of the U sublattice

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