Quasi-two-dimensional antiferromagnet on a triangular latticeRbFe(MoO4)2

Quasi-two-dimensional antiferromagnet on a triangular lattice RbFe„MoO4...2

RbFe(MoO4)2 is a rare example of a nearly two-dimensional Heisenberg antiferromagnet on a triangular lattice. Magnetic resonance spectra and magnetization curves reveal that the system has a layered spin structure with six magnetic sublattices. The sublattices within a layer are arranged in a triangular manner with the magnetization vectors 120° apart. The H-T phase diagram, containing at least...

Heisenberg Antiferromagnet on a Triangular Lattice

Magnon breakdown in a two dimensional triangular lattice Heisenberg antiferromagnet of multiferroic LuMnO3.

The breakdown of magnons, the quasiparticles of magnetic systems, has rarely been seen. By using an inelastic neutron scattering technique, we report the observation of spontaneous magnon decay in multiferroic LuMnO3, a simple two dimensional Heisenberg triangular lattice antiferromagnet, with large spin S=2. The origin of this rare phenomenon lies in the nonvanishing cubic interaction between ...

Holes in a Two–dimensional Quantum Antiferromagnet

A brief review is presented on the studies of the hole motion in a two–dimensional quantum antiferromagnet. An extended introduction is given to cover the background of the problem. The quantum Bogoliubov–de Gennes formalism which treats the local distortion of the spin configuration and the quantum renormalization process on an equal footing, is outlined. The latest development on the central ...

BaNi2V2O8 : A two-dimensional honeycomb antiferromagnet

N. Rogado, Q. Huang, J. W. Lynn, A. P. Ramirez, D. Huse, and R. J. Cava Department of Chemistry and Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544 NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 Department of Thermal Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Department of...