Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-06-11
Phys. Rev. B 65, 214429 (2002).
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, ReVTeX, 6 EPS figures : Will appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.65.214429
The effect of uniaxial pressure (P_u) on the magnetic susceptibility (X), magnetization (M), and magnetoresistance (MR) of the heavy-fermion metamagnet CeRu2Si2 has been investigated. For the magnetic field along the tetragonal c axis, it is found that characteristic physical quantities, i.e., the temperature of the susceptibility maximum (T_max), the pagamagnetic Weiss temperature (Q_p), 1/X at 2 K, and the magnetic field of the metamagnetic anomaly (H_M), scale approximately linearly with P_u, indicating that all the quantities are related to the same energy scale, probably of the Kondo temperature. The increase (decrease) of the quantities for P_u || c axis (P_u || a axis) can be attributed to a decrease (increase) in the nearest Ce-Ru distance. Consistently in MR and X, we observed a sign that the anisotropic nature of the hybridization, which is believed to play an important role in the metamagnetic anomaly, can be controlled by applying the uniaxial pressure. PACS numbers: 75.20.Hr, 71.27.+a, 74.62.Fj
Aoki Yasumichi
Namiki Takahiro
Saha Shanta Ranjan
Sato Haruo
Sugawara Hirotaka
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