Co-existing chiral and collinear phases in a distorted triangular antiferromagnet

Details Co-existing chiral and collinear phases in a distorted triangular antiferromagnet Co-existing chiral and collinear phases in a distorted triangular antiferromagnet

2008-07-17

arxiv.org/abs/0807.2804v1

Phys. Rev. Lett. 102, 037202 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.102.037202

The entire magnetic phase diagram of the quasi two dimensional (2D) magnet on a distorted triangular lattice KFe(MoO4)2 is outlined by means of magnetization, specific heat, and neutron diffraction measurements. It is found that the spin network breaks down into two almost independent magnetic subsystems. One subsystem is a collinear antiferromagnet that shows a simple spin-flop behavior in applied fields. The other is a helimagnet that instead goes through a series of exotic commensurate-incommensurate phase transformations. In the various phases one observes either true 3D order or quasi-2D order. The experimental findings are compared to theoretical predictions found in literature

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