Abstract
The magnetic excitations in were studied across the metamagnetic transition and as a function of temperature using inelastic neutron scattering. At low temperature and low magnetic field the magnetic response is dominated by a complex superposition of incommensurate antiferromagnetic fluctuations. Upon increasing the magnetic field across the metamagnetic transition, paramagnon and finally well-defined magnon scattering is induced, partially suppressing the incommensurate signals. The high-field phase in , therefore, has to be considered as an intrinsically ferromagnetic state stabilized by the magnetic field.
- Received 30 March 2007
- Corrected 21 November 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.217402
©2007 American Physical Society
Corrections
21 November 2007