Metamagnetic Transition in a Heavy Fermion Superconductor URu 2Si 2
| Autor: | Etsuji Yamamoto, Hitoshi Ohkuni, Koichi Kindo, Yoshinori Haga, Kiyohiro Sugiyama, Tetsuo Honma, Yoshichika Onuki, Miho Nakashima |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Journal of the Physical Society of Japan. 68:3394-3401 |
| ISSN: | 1347-4073 0031-9015 |
| Popis: | We have carried out the magnetization measurements in high magnetic fields up to 60 T and in the wide temperature range from 1.3 to 77 K for a heavy femion superconductor URu 2 Si 2 . A sharp metamagnetic transition with three steps is found below 14 K for the field along the tetragonal [001] direction. This transition is changed into a sharp metamagnetic transition with two steps in a narrow temperature range from about 14 to 17 K and furthermore into a broad metamagnetic transition with one step above the Neel temperature T N =17.5 K. The broad transition persists up to a characteristic temperature T χ m a x (=55 K) where the magnetic susceptibility has a maximum in the temperature dependence. These results are discussed on the basis of a change of the electronic state of 5 f -electrons from itinerant to localized and the crystalline electric field model. |
| Databáze: | OpenAIRE |
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