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Journal Articles

Magnetic and Fermi surface properties of UPtGa

Tokiwa, Yoshifumi; Ikeda, Shugo*; Haga, Yoshinori; Okubo, Tomoyuki*; Iizuka, Tomoya*; Sugiyama, Kiyohiro*; Nakamura, Akio; Onuki, Yoshichika

Journal of the Physical Society of Japan, 71(3), p.845 - 851, 2002/03

https://doi.org/10.1143/JPSJ.71.845

Times Cited Count：40 Percentile：81.12(Physics, Multidisciplinary)

We succeeded in growing a high-quality single crystal of an antiferromagnet UPtGa by the self-flux method, and measured the magnetic susceptibility, electrical resistivity, specific heat and de Haas-van Alphen (dHvA) oscillation. We found an antiferromagnetic transition at 26K from the magnetic susceptibility and electrical resistivity measurements. Six dHvA branches were observed, ranging from 1.1410 to 1.1310 Oe. Fermi surfaces consist of two nearly cylindrical and two spherical Fermi surfaces. The cyclotron mass is large, ranging from 10 to 24 $m_{rm 0}$ , which is consistent with the electronic specific heat coefficient = 57 mJ/Kmol.

Journal Articles

Electronic structure and the Fermi surface of UBe $_{13}$

Maehira, Takahiro; Higashitani, Atsushi*; Higuchi, Masahiko*; Yasuhara, Hiroshi*; Hasegawa, Akira*

Physica B; Condensed Matter, 312-313(1-4), p.103 - 105, 2002/03

https://doi.org/10.1016/S0921-4526(01)01073-0

Times Cited Count：12 Percentile：53.16(Physics, Condensed Matter)

UBe $_{13}$ is a typical heavy-fermion superconductor compound. The lowtemperature electronic specific heat coefficient has the anomalous large value, $gamma_{exp}$ =1.1J/Kmol, which is the largest among the heavy fermion uranium compounds. It also becomes the superconductor below T=0.85K. Therefore, UBe $_{13}$ is an important material as a strongly correlated electron system, and it is necessary to study from both sides of the theory and the experiment. The measurement suggests that the Fermi surface of UBe $_{13}$ may consist of small sheets. The energy band structure and the Fermi surface for UBe $_{13}$ are calculated by the relativistic linear APW method.