Helimagnetism in the Heisenberg Model: New Features and Old Mechanisms
Competition between exchange couplings is the well known mechanism  giving non collinear spin configuration in an Heisenberg model and here we discuss two different situations. First we consider the case of competition between couplings in the basal plane as is the case, for instance,of compounds of the NiBr2 family.
KeywordsSpin Wave Long Range Order Heisenberg Model Logarithmic Divergence Border Line
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