Spin-glass behavior in ternary uranium compound U2CuGa 3

Tomoo Yamamura; Tokushin Ri; Kunio Yubuta; Y. Shiokawa

doi:10.1016/j.jallcom.2003.11.106

Spin-glass behavior in ternary uranium compound U₂CuGa ₃

Tomoo Yamamura, Tokushin Ri, Kunio Yubuta, Y. Shiokawa

Research output: Contribution to journal › Article

5 Citations (Scopus)

Abstract

The results of dc susceptibility, magnetization, magnetic relaxation and specific heat measurements on U₂CuGa₃, a compound reported early in the literature as exhibiting interesting magnetic properties, are presented. The temperature dependence of susceptibility measured in the zero-field cooling (ZFC) mode and in the field cooling (FC) mode displays spin-glass behavior below a characteristic temperature T_f (∼16K) in agreement with the literature. As a new evidence for the formation of spin-glass state in this compound, the specific heat data do not show any visible singularity around T_f indicating the absence of long-range magnetic order at this temperature. Furthermore, the characteristic remanence effect and magnetic relaxation on a macroscopic time scale are also observed below T_f. The experimental results are compared with those of orthorhombic CeCu₂-type spin-glass compound U₂AuGa ₃ and hexagonal AlB₂-type spin-glass compound U ₂PdSi₃.

Original language	English
Pages (from-to)	226-229
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	374
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2003.11.106
Publication status	Published - 2004 Jul 14

Keywords

Magnetic relaxation
Specific heat
Spin-glass
UCuGa

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Spin-glass behavior in ternary uranium compound U2CuGa 3",

abstract = "The results of dc susceptibility, magnetization, magnetic relaxation and specific heat measurements on U2CuGa3, a compound reported early in the literature as exhibiting interesting magnetic properties, are presented. The temperature dependence of susceptibility measured in the zero-field cooling (ZFC) mode and in the field cooling (FC) mode displays spin-glass behavior below a characteristic temperature Tf (∼16K) in agreement with the literature. As a new evidence for the formation of spin-glass state in this compound, the specific heat data do not show any visible singularity around Tf indicating the absence of long-range magnetic order at this temperature. Furthermore, the characteristic remanence effect and magnetic relaxation on a macroscopic time scale are also observed below Tf. The experimental results are compared with those of orthorhombic CeCu2-type spin-glass compound U2AuGa 3 and hexagonal AlB2-type spin-glass compound U 2PdSi3.",

keywords = "Magnetic relaxation, Specific heat, Spin-glass, UCuGa",

author = "Tomoo Yamamura and Tokushin Ri and Kunio Yubuta and Y. Shiokawa",

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T1 - Spin-glass behavior in ternary uranium compound U2CuGa 3

AU - Yamamura, Tomoo

AU - Ri, Tokushin

AU - Yubuta, Kunio

AU - Shiokawa, Y.

PY - 2004/7/14

Y1 - 2004/7/14

N2 - The results of dc susceptibility, magnetization, magnetic relaxation and specific heat measurements on U2CuGa3, a compound reported early in the literature as exhibiting interesting magnetic properties, are presented. The temperature dependence of susceptibility measured in the zero-field cooling (ZFC) mode and in the field cooling (FC) mode displays spin-glass behavior below a characteristic temperature Tf (∼16K) in agreement with the literature. As a new evidence for the formation of spin-glass state in this compound, the specific heat data do not show any visible singularity around Tf indicating the absence of long-range magnetic order at this temperature. Furthermore, the characteristic remanence effect and magnetic relaxation on a macroscopic time scale are also observed below Tf. The experimental results are compared with those of orthorhombic CeCu2-type spin-glass compound U2AuGa 3 and hexagonal AlB2-type spin-glass compound U 2PdSi3.

AB - The results of dc susceptibility, magnetization, magnetic relaxation and specific heat measurements on U2CuGa3, a compound reported early in the literature as exhibiting interesting magnetic properties, are presented. The temperature dependence of susceptibility measured in the zero-field cooling (ZFC) mode and in the field cooling (FC) mode displays spin-glass behavior below a characteristic temperature Tf (∼16K) in agreement with the literature. As a new evidence for the formation of spin-glass state in this compound, the specific heat data do not show any visible singularity around Tf indicating the absence of long-range magnetic order at this temperature. Furthermore, the characteristic remanence effect and magnetic relaxation on a macroscopic time scale are also observed below Tf. The experimental results are compared with those of orthorhombic CeCu2-type spin-glass compound U2AuGa 3 and hexagonal AlB2-type spin-glass compound U 2PdSi3.

KW - Magnetic relaxation

KW - Specific heat

KW - Spin-glass

KW - UCuGa

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