Mean-field description of skyrmion lattice in hexagonal frustrated antiferromagnets

Physical Review B: Condensed Matter and Materials Physics. 2022. Vol. 105. Article 054435.

Utesov O.

A simple mean-field description of frustrated antiferromagnets on hexagonal lattices, aimed to describe the
high-temperature part of the temperature-magnetic field phase diagram, is proposed. It is shown that an interplay
between modulation vector symmetry, Zeeman energy, and magnetodipolar interaction leads to stabilization of
the triple-Q skyrmion lattice in a certain region of the phase diagram. The corresponding analytical expressions
for phase boundaries are derived. The possible relevance to the high-temperature part of the Gd2PdSi3 phase
diagram is discussed.

Keywords: phase transitions, фазовые переходы, skyrmions, Скирмионы, mean-field approach, метод среднего поля, skyrmion lattice, Скирмионная решетка