Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnet CeRhIn5

被引:62
作者
Cornelius, AL [1 ]
Arko, AJ
Sarrao, JL
Hundley, MF
Fisk, Z
机构
[1] Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA
[2] Univ Calif Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA
[3] Florida State Univ, Natl Magnet Field Lab, Tallahassee, FL 32306 USA
[4] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA
来源
PHYSICAL REVIEW B | 2000年 / 62卷 / 21期
关键词
D O I
10.1103/PhysRevB.62.14181
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have used high pulsed magnetic fields to 50 T to observe de Haas-van Alphen oscillations in the tetragonal antiferromagnet CeRhIn5, which has an enhanced value of the electronic specific heat coefficient gamma greater than or similar to 420 mJ/mol K-2. For T<T-N, the specific heat data at zero applied magnetic field are consistent with the existence of an anisotropic spin-density wave opening a gap in the Fermi surface. The low-temperature magnetization reveals a magnetic phase transition that appears to be first order in nature. Quantum oscillations, which are observed for T<T-N when B parallel to [100] and B parallel to [001], reveal an anisotropic Fermi surface. The temperature dependence of the amplitudes of the quantum oscillations shows anomalous behavior for B parallel to [001] as a maximum at T*approximate to1.2 K is observed which we attribute to a gap opening in the anisotropic Fermi surface. The electronic and magnetic properties are anisotropic due to the quasi-two-dimensional crystal structure.
引用
收藏
页码:14181 / 14185
页数:5
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