Magnetic and Fermi surface properties of UPtGa

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

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.

Language	:	English
Journal	:	Journal of the Physical Society of Japan
Volume	:	71
Number	:	3
Pages	:	p.845 - 851
Publication Year/Month	:	2002/03
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Paper URL	:	https://doi.org/10.1143/JPSJ.71.845
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Keywords	:	UPtGa; 反強磁性転位; 単結晶; フェルミ面; dHvA効果
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Registration No. : A20010540
JAEA Abstracts No. :
Paper Submission No. : 13559

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