Noncollinear Magnetic Configurations in Frustrated Magnets

The exploration of materials with nanoscale noncollinear configurations has been continuously attracting attention due to the prospective applications in high-performance magnetic devices. Compared to ferromagnetic materials, noncollinear structures in frustrated magnets hold greater research value due to their smaller sizes and unique properties. However, an effective description of the nanoscale noncollinear domain structures in frustrated magnets is lacking. Here, we propose an approach based on a phase-field model to predict magnetic configurations in frustrated magnets within a square lattice system. The metastable domain structures have been determined under the competition between the nearest-neighbor ferromagnetic interaction and the third-neighbor antiferromagnetic exchange interaction. The conditions required for the stable existence of noncollinear phases have been theoretically derived. Additionally, we investigate the spin response to external fields for different J₁ - J₃ values, and we also examine the spin response to external fields for various values of J₁ - J₃, focusing on the emerging topological soliton states. Our research results not only hold crucial significance in facilitating an understanding of the complex characteristics of frustrated magnets but also offer theoretical guidance for further exploring the application potentials of these systems in diverse aspects such as emerging inductor devices and storage devices.