Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Page Number
237204
Volume
102
Issue
23
Abstract
This paper examines the relation between the spin-wave instabilities of collinear magnetic phases
and the resulting non-collinear phases for a geometrically-frustrated triangular-lattice antiferromag-
net in the high spin limit. Using a combination of phenomenological and Monte-Carlo techniques,
we demonstrate that the instability wave-vector with the strongest intensity in the collinear phase
determines the wave-vector of a cycloid or the dominant elastic peak of a more complex non-collinear
phase. Our results are related to the observed multi-ferroic phase of Al-doped CuFeO2.
