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Journal Articles

Electrical and magnetic properties of a single crystal UCu$$_2$$Si$$_2$$

Matsuda, Tatsuma; Haga, Yoshinori; Ikeda, Shugo; Galatanu, A.; Yamamoto, Etsuji; Shishido, Hiroaki*; Yamada, Mineko*; Yamaura, Junichi*; Hedo, Masato*; Uwatoko, Yoshiya*; et al.

Journal of the Physical Society of Japan, 74(5), p.1552 - 1556, 2005/05

 Times Cited Count:21 Percentile:70.75(Physics, Multidisciplinary)

We have succeeded in growing a high-quality single crystal of UCu$$_2$$Si$$_2$$ with the tetragonal structure by the Sn-flux method and measured the electrical resistivity, magnetic susceptibility, magnetization and specific heat. UCu$$_2$$Si$$_2$$ is found to order antiferromagnetically below $$T_{rm N}$$ = 106 K, and follows a successive ferromagnetic ordering at $$T_{rm C}$$ = 100 K. The magnetic properties are highly anisotropic, reflecting the crystal structure. An easy-axis of magnetization is found to be the [001] direction ($$c$$-axis) both in the antiferromagnetic and ferromagnetic phases, while the [100] direction ($$a$$-axis) corresponds to the hard-axis in magnetization. The magnetization curve in the antiferromagnetic phase indicates a clear metamagnetic transition at a low field of about 1 kOe and changes smoothly into a ferromagnetic magnetization curve below $$T_{rm C}$$ = 100 K. The saturation moment is determined as 1.75$$mu_{rm B}$$/U at 2 K. The electronic specific heat coefficient is also determined as 20 mJ/K$$^2$$$$cdot$$mol.

Journal Articles

Magnetic and Fermi surface properties of UTGa$$_{5}$$(T:Fe, Co and Pt)

Ikeda, Shugo; Tokiwa, Yoshifumi*; Okubo, Tomoyuki*; Yamada, Mineko*; Matsuda, Tatsuma; Inada, Yoshihiko*; Settai, Rikio*; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika

Physica B; Condensed Matter, 329-333(2), p.610 - 611, 2003/05

 Times Cited Count:13 Percentile:57.27(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Quasi-two dimensional electronic state of the antiferromagnet UPtGa$$_5$$

Ikeda, Shugo; Tokiwa, Yoshifumi*; Haga, Yoshinori; Yamamoto, Etsuji; Okubo, Tomoyuki*; Yamada, Mineko*; Nakamura, Noriko*; Sugiyama, Kiyohiro*; Kindo, Koichi*; Inada, Yoshihiko*; et al.

Journal of the Physical Society of Japan, 72(3), p.576 - 581, 2003/03

 Times Cited Count:41 Percentile:83.42(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Single crystal growth and magnetic and electrical properties of an antiferromagnet UCr$$_2$$Si$$_2$$

Matsuda, Tatsuma; Haga, Yoshinori; Tokiwa, Yoshifumi; Yamamoto, Etsuji; Ikeda, Shugo; Okubo, Tomoyuki*; Yamada, Mineko*; Nakamura, Akio; Onuki, Yoshichika

Journal of Nuclear Science and Technology, 39(Suppl.3), p.225 - 228, 2002/11

no abstracts in English

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