Magnetic behavior of Ge-rich UCuGe

Dexin Li; Yoshinobu Shiokawa

doi:10.1080/00223131.2002.10875434

Magnetic behavior of Ge-rich UCuGe

Dexin Li, Yoshinobu Shiokawa

IMR - Materials Processing and Characterization Division

Tohoku University

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

2 Citations (Scopus)

Abstract

We present here the magnetic properties of ternary intermetallic compound UCuGe_1.025, a Ge-rich UCuGe system with hexagonal CeCd₂-type crystal structure (space group P3m1). Dc magnetization and ac susceptibility measurements reveal that UCuGe_1.025 is dominated by long-range ferromagnetic interactions with Curie temperature T_c=70 K. Irreversible magnetism observed in this system is mainly resulted from the domain-wall pinning effects due to strong magnetic anisotropy. A very small frequency shift of ac susceptibility peak position is observed suggesting that some spins are randomly frozen in this system in spite of the rather weak spin-glass effect. Our data are also compared with other reported experimental results of the Ge-deficient and stoichiometric UCuGe systems. It is concluded that in U-Cu-Ge systems antiferromagnetic exchange interaction is weakened and ferromagnetic interaction is strengthened with increasing Ge-concentration in the vicinity of the composition 1:1:1.

Original language	English
Pages (from-to)	164-167
Number of pages	4
Journal	Journal of Nuclear Science and Technology
Volume	39
DOIs	https://doi.org/10.1080/00223131.2002.10875434
Publication status	Published - 2002 Nov

Keywords

Domain-wall pinning effect
Magnetization
Spin glass
Susceptibility
UCuGe

Access to Document

10.1080/00223131.2002.10875434

Cite this

@article{c272a504f1e541ed85cbe2d1fb3162ec,

title = "Magnetic behavior of Ge-rich UCuGe",

abstract = "We present here the magnetic properties of ternary intermetallic compound UCuGe1.025, a Ge-rich UCuGe system with hexagonal CeCd2-type crystal structure (space group P3m1). Dc magnetization and ac susceptibility measurements reveal that UCuGe1.025 is dominated by long-range ferromagnetic interactions with Curie temperature Tc=70 K. Irreversible magnetism observed in this system is mainly resulted from the domain-wall pinning effects due to strong magnetic anisotropy. A very small frequency shift of ac susceptibility peak position is observed suggesting that some spins are randomly frozen in this system in spite of the rather weak spin-glass effect. Our data are also compared with other reported experimental results of the Ge-deficient and stoichiometric UCuGe systems. It is concluded that in U-Cu-Ge systems antiferromagnetic exchange interaction is weakened and ferromagnetic interaction is strengthened with increasing Ge-concentration in the vicinity of the composition 1:1:1.",

keywords = "Domain-wall pinning effect, Magnetization, Spin glass, Susceptibility, UCuGe",

author = "Dexin Li and Yoshinobu Shiokawa",

year = "2002",

month = nov,

doi = "10.1080/00223131.2002.10875434",

language = "English",

volume = "39",

pages = "164--167",

journal = "Journal of Nuclear Science and Technology",

issn = "0022-3131",

publisher = "Taylor and Francis Ltd.",

}

TY - JOUR

T1 - Magnetic behavior of Ge-rich UCuGe

AU - Li, Dexin

AU - Shiokawa, Yoshinobu

PY - 2002/11

Y1 - 2002/11

N2 - We present here the magnetic properties of ternary intermetallic compound UCuGe1.025, a Ge-rich UCuGe system with hexagonal CeCd2-type crystal structure (space group P3m1). Dc magnetization and ac susceptibility measurements reveal that UCuGe1.025 is dominated by long-range ferromagnetic interactions with Curie temperature Tc=70 K. Irreversible magnetism observed in this system is mainly resulted from the domain-wall pinning effects due to strong magnetic anisotropy. A very small frequency shift of ac susceptibility peak position is observed suggesting that some spins are randomly frozen in this system in spite of the rather weak spin-glass effect. Our data are also compared with other reported experimental results of the Ge-deficient and stoichiometric UCuGe systems. It is concluded that in U-Cu-Ge systems antiferromagnetic exchange interaction is weakened and ferromagnetic interaction is strengthened with increasing Ge-concentration in the vicinity of the composition 1:1:1.

AB - We present here the magnetic properties of ternary intermetallic compound UCuGe1.025, a Ge-rich UCuGe system with hexagonal CeCd2-type crystal structure (space group P3m1). Dc magnetization and ac susceptibility measurements reveal that UCuGe1.025 is dominated by long-range ferromagnetic interactions with Curie temperature Tc=70 K. Irreversible magnetism observed in this system is mainly resulted from the domain-wall pinning effects due to strong magnetic anisotropy. A very small frequency shift of ac susceptibility peak position is observed suggesting that some spins are randomly frozen in this system in spite of the rather weak spin-glass effect. Our data are also compared with other reported experimental results of the Ge-deficient and stoichiometric UCuGe systems. It is concluded that in U-Cu-Ge systems antiferromagnetic exchange interaction is weakened and ferromagnetic interaction is strengthened with increasing Ge-concentration in the vicinity of the composition 1:1:1.

KW - Domain-wall pinning effect

KW - Magnetization

KW - Spin glass

KW - Susceptibility

KW - UCuGe

UR - http://www.scopus.com/inward/record.url?scp=85010549532&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85010549532&partnerID=8YFLogxK

U2 - 10.1080/00223131.2002.10875434

DO - 10.1080/00223131.2002.10875434

M3 - Article

AN - SCOPUS:85010549532

SN - 0022-3131

VL - 39

SP - 164

EP - 167

JO - Journal of Nuclear Science and Technology

JF - Journal of Nuclear Science and Technology

ER -

Magnetic behavior of Ge-rich UCuGe

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this