Influence of fluctuations on spin systems with spatially isotropic competing interactions
- 1 October 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (10) , 6363-6370
- https://doi.org/10.1103/physrevb.42.6363
Abstract
We consider spin systems with competing interactions isotropic with respect to the axes of a cubic lattice. A renormalization-group analysis carried to second order in ε=d-4 demonstrates that the critical behavior for the para-modulated phase transition is 2m-component-like with m=3 for a uniaxially modulated phase and m=4 for a cubically modulated phase, in the same universality class as the m-component spin model with uniaxial competing interactions. Each case may describe different helical magnetic rare-earth alloys. Possible phase diagrams are proposed encompassing such compounds.Keywords
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