Study of the 1-K phase transition in the heavy-electron compound UCu5 by muon spin resonance and neutron scattering
Abstract
The 1-K phase transition in UCu5, showing up in specific-heat data within the antiferromagnetic state below TN~=15 K, was investigated. Neither the average internal fields seen by the μ+ nor the magnetic and nuclear Bragg reflections in the neutron-diffraction data reflect the phase transition while the muon relaxation rates increase drastically below 1.2 K. These results are interpreted in terms of some additional small-moment magnetic order or spin-density-wave phenomenon, implying the coexistence of two rather independent electronic subsystems, one involving ``heavy'' electrons, associated with the weak magnetism, and the other associated with the ``conventional'' antiferromagnetic order.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 1990
- DOI:
- 10.1103/PhysRevLett.65.2454
- Bibcode:
- 1990PhRvL..65.2454S
- Keywords:
-
- 75.30.Mb;
- 75.25.+z;
- 76.75.+i;
- Valence fluctuation Kondo lattice and heavy-fermion phenomena;
- Spin arrangements in magnetically ordered materials;
- Muon spin rotation and relaxation