Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnet CeRhIn{sub 5}
We have used high pulsed magnetic fields to 50 T to observe de Haas--van Alphen oscillations in the tetragonal antiferromagnet CeRhIn{sub 5}, which has an enhanced value of the electronic specific heat coefficient {gamma}{approx}>420 mJ/molK{sup 2}. For T<T{sub 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{sub N} when B{parallel}[100] and B{parallel}[001], reveal an anisotropic Fermi surface. The temperature dependence of the amplitudes of the quantum oscillations shows anomalous behavior for B{parallel}[001] as a maximum at T{sup *}{approx}1.2 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.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205653
- Journal Information:
- Physical Review B, Vol. 62, Issue 21; Other Information: Othernumber: PRBMDO000062000021014181000001; 114045PRB; PBD: 1 Dec 2000; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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