Magnetic structures and reorientation transitions in noncentrosymmetric uniaxial antiferromagnets

By A. Bogdanov, U. Rößler, M. Wolf, K. Müller. 2002

167 citations recorded by the source corpus.

A phenomenological theory of magnetic states in noncentrosymmetric tetragonal antiferromagnets is developed, which has to include homogeneous and inhomogeneous terms (Lifshitz invariants) derived from Dzyaloshinskii-Moriya couplings. Magnetic properties of this class of antiferromagnets with low crystal symmetry are discussed in relation to the recently detected compounds ${\mathrm{Ba}}_{2}{\mathrm{CuGe}}_{2}{\mathrm{O}}_{7}$ and ${\mathrm{K}}_{2}{\mathrm{V}}_{3}{\mathrm{O}}_{8}.$ Crystallographic symmetry and magnetic ordering in these systems allow the simultaneous occurrence of chiral inhomogeneous magnetic structures and weak ferromagnetism. Incommensurate magnetic structures, chiral helices, with a rotation of the staggered magnetization accompanied by oscillations of the total magnetization, are possible. Field-induced reorientation transitions into modulated states have been studied and corresponding phase diagrams are constructed. Structures of magnetic defects (domain-walls and vortices) are discussed. In particular, vortices, i.e., localized nonsingular line defects, are stabilized by inhomogeneous Dzyaloshinskii-Moriya interactions in uniaxial noncentrosymmetric antiferromagnets.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/adf651cc435e8e2ded2e75eafa181e802e3bb0e3

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In Condensed Matter Physics

1. A. Bogdanov
2. B. Göbel
3. Jiang Xiao
4. H. Schultheiss
5. Haiming Yu
6. O. Tretiakov
7. I. Mertig
8. C. Panagopoulos

In Electronic, Optical and Magnetic Materials

1. B. Göbel
2. Jiang Xiao
3. H. Schultheiss
4. Haiming Yu
5. O. Tretiakov
6. I. Mertig

Citations in the corpus

• Magnetic texture based magnonics (2020, background): “where A and J are the inhomogeneous and homogeneous Heisenberg exchange coupling constants, and D and d are the inhomogeneous and homogeneous DMI constants, respectively [42].”
• Beyond skyrmions: Review and perspectives of alternative magnetic quasiparticles (2020, background): “The full set of Lifshitz invariants and the corresponding stabilized skyrmions and antiskyrmions can be found in Ref [72].”
• Spontaneous skyrmion ground states in magnetic metals (2006, background): “tion with a staggered antiferromagnetic vector order parameter [38].”