High-field metamagnetism in the antiferromagnetCeRh2Si2

2010/02/09 by W. Knafo, D. Aoki, D. Vignolles +9 · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Algorithm #Antiferromagnetism #Computer science #Condensed matter physics #Field (mathematics) #Iron-based superconductors research #Magnetic Properties of Alloys #Magnetic field #Magnetization #Mathematics #Metamagnetism #Physics #Pure mathematics #Quantum mechanics #Rare-earth and actinide compounds #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.81.094403

published as Phys. Rev. B 81, 094403 (2010). · 10 pages, 11 figures

arxiv created 2010/02/09 · openalex publication_date 2010/03/03 · arxiv updated 2010/03/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A study of the antiferromagnet CeRh₂Si₂ by torque, magnetostriction, and transport in pulsed magnetic fields up to 50 T and by thermal expansion in static fields up to 13 T is presented. The magnetic field temperature phase diagram of CeRh₂Si₂, where the magnetic field is applied along the easy axis c, is deduced from these measurements. The second-order phase transition temperature T_N and the first-order phase transition temperature T_1,2 (=36 K and 26 K at zero field, respectively) decrease with increasing field. The field-induced antiferromagnetic-to-paramagnetic borderline H_c, which equals 26 T at 1.5 K, goes from first order at low temperature to second order at high temperature. The magnetic field temperature phase diagram is found to be composed of (at least) three different antiferromagnetic phases. These are separated by the first-order lines H_1,2, corresponding to T_1,2 at H=0, and H_2,3, which equals 25.5 T at 1.5 K. A maximum of the T²-coefficient A of the resistivity is observed at the onset of the high-field polarized regime, which is interpreted as the signature of an enhanced effective mass at the field-induced quantum instability. The magnetic field dependence of the A coefficient in CeRh₂Si₂ is compared with its pressure dependence, and also with the field dependence of A in the prototypal heavy-fermion system CeRu₂Si₂.

Citations

• Universal relationship of the resistivity and specific heat in heavy-Fermion compounds
• Quantum critical phenomena
• On the destruction of the hidden order in URu 2 Si 2 by a strong magnetic field

Cited by

• Fermi Surfaces in the Antiferromagnetic, Paramagnetic and Polarized Paramagnetic States of CeRh2Si2 Compared with Quantum Oscillation Experiments