6533b823fe1ef96bd127f4a9
RESEARCH PRODUCT
Study of the Spin Wave Linewidth in a 1-D Easy-Plane Ferromagnet Using Neutron Polarization Analysis
M. SteinerK. KakuraiB. Dornersubject
Brillouin zonePhysicsLaser linewidthCondensed matter physicsSpin polarizationSpin waveSpin Hall effectGeneral Physics and AstronomyCondensed Matter::Strongly Correlated ElectronsWave vectorNeutron scatteringPolarization (waves)description
An anomalous wavevector dependence in the spin wave linewidth associated with fluctuations out of the easy plane is observed for the first time in the one-dimensional easy-plane ferromagnet CsNiF3 by means of inelastic polarized neutron scattering. The linewidths of the spin waves, one attributed to spin fluctuations out of the easy plane and another in the easy plane, are studied separately throughout the Brillouin zone. The zone boundary narrowing of the linewidth associated with the spin fluctuations in the easy plane is observed for the first time in agreement with the classical spin wave theory. The deviations from the classical result at large qc and high temperature are interpreted as an expression of the quantum nature of the S = 1 spin chain.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-08-01 | Europhysics Letters (EPL) |