Abstract
We have studied the magnetic and Fermi surface properties in a ferromagnet UGa2. The electrical resistivity, elastic constant, thermal expansion coefficient, thermoelectric power, magnetic susceptibility and Hall coefficient indicate highly anisotropic properties, reflecting the hexagonal structure. The 5f2- and 5f3-CEF schemes, based on the localized 5f-electron nature, are discussed to understand the magnetic susceptibility and magnetization data. We have also done the magnetoresistance and de Haas-van Alphen (dHvA) experiments to investigate the Fermi surface properties. Both data are very complicated, implying that the Fermi surface is a multiply-connected one. They are explained neither by the localized 5f2- and 5f3-core models nor by the spin-polarized 5f-itinerant model. The cyclotron mass is, however, rather light, ranging from 0.17 to 6.2m0, which is consistent with the electronic specific heat coefficient of 11 mJ/K2-mol.
| Original language | English |
|---|---|
| Pages (from-to) | 2647-2659 |
| Number of pages | 13 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 69 |
| Issue number | 8 |
| Publication status | Published - Aug 2000 |
| Externally published | Yes |
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Keywords
- De Haas-van Alphen effect
- Ferromagnet
- Magnetoresistance
- UGa
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Magnetic and Fermi surface properties of the ferromagnetic compound UGa2 . / Honma, Tetsuo; Inada, Yoshihiko; Settai, Rikio; Araki, Shingo; Tokiwa, Yoshihumi; Takeuchi, Tetsuya; Sugawara, Hitoshi; Sato, Hideyuki; Kuwahara, Keitaro; Yokoyama, Makoto; Amitsuka, Hiroshi; Sakakibara, Toshiro; Yamamoto, Etsuji; Haga, Yoshinori; Nakamura, Akio; Harima, Hisatomo; Yamagami, Hiroshi; Onuki, Yoshichika.
In: Journal of the Physical Society of Japan, Vol. 69, No. 8, 08.2000, p. 2647-2659.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Magnetic and Fermi surface properties of the ferromagnetic compound UGa2
AU - Honma, Tetsuo
AU - Inada, Yoshihiko
AU - Settai, Rikio
AU - Araki, Shingo
AU - Tokiwa, Yoshihumi
AU - Takeuchi, Tetsuya
AU - Sugawara, Hitoshi
AU - Sato, Hideyuki
AU - Kuwahara, Keitaro
AU - Yokoyama, Makoto
AU - Amitsuka, Hiroshi
AU - Sakakibara, Toshiro
AU - Yamamoto, Etsuji
AU - Haga, Yoshinori
AU - Nakamura, Akio
AU - Harima, Hisatomo
AU - Yamagami, Hiroshi
AU - Onuki, Yoshichika
PY - 2000/8
Y1 - 2000/8
N2 - We have studied the magnetic and Fermi surface properties in a ferromagnet UGa2. The electrical resistivity, elastic constant, thermal expansion coefficient, thermoelectric power, magnetic susceptibility and Hall coefficient indicate highly anisotropic properties, reflecting the hexagonal structure. The 5f2- and 5f3-CEF schemes, based on the localized 5f-electron nature, are discussed to understand the magnetic susceptibility and magnetization data. We have also done the magnetoresistance and de Haas-van Alphen (dHvA) experiments to investigate the Fermi surface properties. Both data are very complicated, implying that the Fermi surface is a multiply-connected one. They are explained neither by the localized 5f2- and 5f3-core models nor by the spin-polarized 5f-itinerant model. The cyclotron mass is, however, rather light, ranging from 0.17 to 6.2m0, which is consistent with the electronic specific heat coefficient of 11 mJ/K2-mol.
AB - We have studied the magnetic and Fermi surface properties in a ferromagnet UGa2. The electrical resistivity, elastic constant, thermal expansion coefficient, thermoelectric power, magnetic susceptibility and Hall coefficient indicate highly anisotropic properties, reflecting the hexagonal structure. The 5f2- and 5f3-CEF schemes, based on the localized 5f-electron nature, are discussed to understand the magnetic susceptibility and magnetization data. We have also done the magnetoresistance and de Haas-van Alphen (dHvA) experiments to investigate the Fermi surface properties. Both data are very complicated, implying that the Fermi surface is a multiply-connected one. They are explained neither by the localized 5f2- and 5f3-core models nor by the spin-polarized 5f-itinerant model. The cyclotron mass is, however, rather light, ranging from 0.17 to 6.2m0, which is consistent with the electronic specific heat coefficient of 11 mJ/K2-mol.
KW - De Haas-van Alphen effect
KW - Ferromagnet
KW - Magnetoresistance
KW - UGa
UR - http://www.scopus.com/inward/record.url?scp=0034422743&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034422743&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0034422743
VL - 69
SP - 2647
EP - 2659
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 8
ER -