Random anisotropy in UGe2 amorphous alloy

Y. Homma; Y. Takakuwa; Y. Shiokawa; D. X. Li; K. Sumiyama; K. Suzuki

doi:10.1016/S0925-8388(98)00415-0

Random anisotropy in UGe₂ amorphous alloy

Y. Homma, Y. Takakuwa, Y. Shiokawa, D. X. Li, K. Sumiyama, K. Suzuki

Materials Processing and Characterization Division

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

3 Citations (Scopus)

Abstract

Magnetic properties have been observed for the UGe₂ amorphous alloy produced by r.f. sputtering. No magnetization saturation at 50 kOe and large coercive force indicate that this alloy has marked random anisotropy. The isothermal remanence decays slowly in a manner of Arrhenius type thermal activation process. The thermomagnetic curves exhibit strong dependence on the history of cooling processes. The zero-field-cooled susceptibility χ₀=M/H (H = 10 Oe), indicates that the UGe₂ amorphous alloy undergoes a higher-order phase transition to a spin-glass like phase with no spontaneous magnetization but an infinite susceptibility, as proposed by Aharony and Pytte.

Original language	English
Pages (from-to)	665-668
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	275-277
DOIs	https://doi.org/10.1016/S0925-8388(98)00415-0
Publication status	Published - 1998 Jul 24

Keywords

Amorphous alloy
Magnetism
Random anisotropy
UGe

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Random anisotropy in UGe2 amorphous alloy",

abstract = "Magnetic properties have been observed for the UGe2 amorphous alloy produced by r.f. sputtering. No magnetization saturation at 50 kOe and large coercive force indicate that this alloy has marked random anisotropy. The isothermal remanence decays slowly in a manner of Arrhenius type thermal activation process. The thermomagnetic curves exhibit strong dependence on the history of cooling processes. The zero-field-cooled susceptibility χ0=M/H (H = 10 Oe), indicates that the UGe2 amorphous alloy undergoes a higher-order phase transition to a spin-glass like phase with no spontaneous magnetization but an infinite susceptibility, as proposed by Aharony and Pytte.",

keywords = "Amorphous alloy, Magnetism, Random anisotropy, UGe",

author = "Y. Homma and Y. Takakuwa and Y. Shiokawa and Li, {D. X.} and K. Sumiyama and K. Suzuki",

note = "Funding Information: The authors wish to thank Dr. I. Sato, Mr. M. Takahashi and Mr. S. Miura for their management of the radioactive materials. This work was supported by a Grant-in-Aid for Scientific Research on Priority Areas (Grant No. 06244102) and for Exploratory Research (Grant No. 08875115) from the Ministry of Education, Science, Sports and Culture of Japan.",

year = "1998",

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doi = "10.1016/S0925-8388(98)00415-0",

language = "English",

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T1 - Random anisotropy in UGe2 amorphous alloy

AU - Homma, Y.

AU - Takakuwa, Y.

AU - Shiokawa, Y.

AU - Li, D. X.

AU - Sumiyama, K.

AU - Suzuki, K.

N1 - Funding Information: The authors wish to thank Dr. I. Sato, Mr. M. Takahashi and Mr. S. Miura for their management of the radioactive materials. This work was supported by a Grant-in-Aid for Scientific Research on Priority Areas (Grant No. 06244102) and for Exploratory Research (Grant No. 08875115) from the Ministry of Education, Science, Sports and Culture of Japan.

PY - 1998/7/24

Y1 - 1998/7/24

N2 - Magnetic properties have been observed for the UGe2 amorphous alloy produced by r.f. sputtering. No magnetization saturation at 50 kOe and large coercive force indicate that this alloy has marked random anisotropy. The isothermal remanence decays slowly in a manner of Arrhenius type thermal activation process. The thermomagnetic curves exhibit strong dependence on the history of cooling processes. The zero-field-cooled susceptibility χ0=M/H (H = 10 Oe), indicates that the UGe2 amorphous alloy undergoes a higher-order phase transition to a spin-glass like phase with no spontaneous magnetization but an infinite susceptibility, as proposed by Aharony and Pytte.

AB - Magnetic properties have been observed for the UGe2 amorphous alloy produced by r.f. sputtering. No magnetization saturation at 50 kOe and large coercive force indicate that this alloy has marked random anisotropy. The isothermal remanence decays slowly in a manner of Arrhenius type thermal activation process. The thermomagnetic curves exhibit strong dependence on the history of cooling processes. The zero-field-cooled susceptibility χ0=M/H (H = 10 Oe), indicates that the UGe2 amorphous alloy undergoes a higher-order phase transition to a spin-glass like phase with no spontaneous magnetization but an infinite susceptibility, as proposed by Aharony and Pytte.

KW - Amorphous alloy

KW - Magnetism

KW - Random anisotropy

KW - UGe

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JO - Journal of Alloys and Compounds

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