Abstract
Neutron scattering demonstrates the coexistence of antiferromagnetic order and superconductivity below 1 K in the heavy-electron system URu2Si2. It is found that the upper (17.5 K) transition is to an antiferromagnetic phase with a (100) modulation wave vector and spins along the tetragonal c-axis. The ordered moment is unusually small, 0.03±0.01)
μB. However, spin waves develop from damped, finite-gap excitations above TN, and they are intense, propagating, and longitudinal with a zone centre gap of 1.8 meV.
μB. However, spin waves develop from damped, finite-gap excitations above TN, and they are intense, propagating, and longitudinal with a zone centre gap of 1.8 meV.
Original language | English |
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Pages (from-to) | 1467-1470 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 58 |
Issue number | 14 |
DOIs | |
Publication status | Published - 6 Apr 1987 |
Externally published | Yes |