ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The singlet ground state antiferromagnet RbFeBr3 shows an induced moment behavior at low temperatures and orders antiferromagnetically at TN=5.5 K. A second magnetic phase transition takes place at 2.0 K. The magnetic phase between 2 K 〈T〈5.5 K may be partially ordered while at T〈2.0 K a modified triangular magnetic structure will be adopted. The temperature dependence of the magnetic excitations at the soft mode point Q(1/3,1/3,1) show a switching of intensity at 2 K. Above 4 K the magnetic excitations start to broaden. Above TN the magentic excitations show a renormalization behavior. The temperature dependence of renormalization is well described by the theoretical predictions of the DCEFA model.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.348819