Abstract
We succeeded in observing de Haas-van Alphen (dHvA) oscillations in an antiferromagnet NpCoGa5 with a tetragonal structure. The dHvA signal was significantly enhanced at higher fields than the metamagnetic transition field Hm (= 43 kOe for H ∥ [001]), where the antiferromagnetic state is changed into the field-induced ferromagnetic (paramagnetic) state. In the paramagnetic state, the Fermi surface was found to consist of two kinds of cylindrical main Fermi surface and small pocket Fermi surfaces. The cyclotron masses of the main Fermi surfaces were considerably large, ranging from 6 to 12 m0. This is the first case where the Fermi surface was determined experimentally in transuranium compounds.
| Original language | English |
|---|---|
| Pages (from-to) | 2608-2611 |
| Number of pages | 4 |
| Journal | journal of the physical society of japan |
| Volume | 73 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2004 Oct 1 |
Keywords
- De Haas-van Alphen effect
- Fermi surface
- NpCoGa
- Transuranium compound
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Aoki, D., Homma, Y., Shiokawa, Y., Yamamoto, E., Nakamura, A., Haga, Y., Settai, R., & Onuki, Y. (2004). Two kinds of cylindrical Fermi surface determined by de Haas-van Alphen experiments in NpCoGa5. journal of the physical society of japan, 73(10), 2608-2611. https://doi.org/10.1143/JPSJ.73.2608