Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
61 (1987), S. 3409-3411
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We report neutron scattering measurements of the spin-wave dispersion relations in the hexagonal triangular antiferromagnet CsMnBr3. The data in the easy plane are described satisfactorily in terms of a model with Heisenberg exchange parameter J2=−0.0019 ±0.0002 meV between a magnetic atom and its six nearest neighbors and a single-ion anisotropy parameter D=0.014±0.002 meV. In a magnetic field of 3.7 T along a 〈100〉 direction the variation of the staggered magnetization, measured at (1/3 1/3 1), as a function of temperature shows two critical phase transitions separated by about 1.7 K. The triangular antiferromagnetic phase that occurs below 8.6 K in zero field is split by the field into two phases with transitions at 8.9 and 7.2 K. The intermediate phase below 8.9 K is of an unknown nature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.338762
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