Simultaneous Measurement of Magnetization and Magnetostriction in CeRu 2Si 2 at Very Low Temperatures: A Test of the One-Parameter Scaling Property
| Autor: | Hiroshi Amitsuka, T. Tayama, Yoshichika Ōnuki, Toshiro Sakakibara, Kenichi Tenya, Kazuyuki Matsuhira, Kunihiko Maezawa, Akiko Nomachi |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Journal of the Physical Society of Japan. 68:3402-3406 |
| ISSN: | 1347-4073 0031-9015 |
| DOI: | 10.1143/jpsj.68.3402 |
| Popis: | Simultaneous measurements of the magnetization M and the magnetostriction λ of a high quality single crystal of CeRu 2 Si 2 were performed at temperatures down to 70 mK in magnetic fields H up to 85 kOe, in order to test the validity of the scaling conjecture M ∼Φ[ H / H s ( P )] around the metamagnetic crossover at very low temperatures. Here H s is a characteristic field and P is the pressure. By use of a thermodynamic equality and the scaling relation, λ( H ) is calculated from the magnetization data M ( H ). For various temperatures below 4.2 K, the calculated results could be fitted to the experimental data of λ( H ) remarkably well with only the single parameter Ω ≡∂ln H s /∂ P ≈200 Mbar -1 , well confirming the scaling relation even at very low temperatures where metamagnetism becomes quite sharp. It is inferred that the metamagnetic behavior of this system is governed by a single energy scale. We have also estimated the constant-volume ( V ) magnetization curve at T =70 mK from the experimentally ... |
| Databáze: | OpenAIRE |
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