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arXiv · 1411.5439

Ising-XY Transition in Three-dimensional Frustrated Antiferromagnets with Collinear Ordering

A. O. Sorokin
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Abstract

Using Monte Carlo simulations, we study the critical behavior of two models of frustrated XY antiferromagnets with a collinear spin ordering and with an additional twofold degeneracy of the ground state. We consider a classic antiferromagnet on a body-centered cubic lattice with an additional antiferromagnetic exchange interaction between next-nearest spins, and a ferromagnet with an extra antiferromagnetic intralayer exchange. In both models, a single first-order transition on the discrete and continuous order parameters is found. Observed critical pseudo-exponents are in agreement with exponents of XY magnets with a planar spin ordering like a stacked-triangular antiferromagnet and helimagnets belonging to the same symmetry class.

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A. O. Sorokin. 2014-11-20. Ising-XY Transition in Three-dimensional Frustrated Antiferromagnets with Collinear Ordering. https://doi.org/10.1134/s0021364019060055

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