Double-k phase of the Dzyaloshinskii-Moriya helimagnet Ba2CuGe2O7

Abstract

Neutron diffraction is used to re-investigate the magnetic phase diagram of the noncentrosymmetric tetragonal antiferromagnet Ba2CuGe2O7. A novel incommensurate double-k magnetic phase is detected near the commensurate-incommensurate phase transition. This phase is stable only for magnetic field closely aligned with the 4-fold symmetry axis. The results emphasize the inadequacy of existing theoretical models for this unique material, and points to additional terms in the Hamiltonian or lattice effects.

4 pages, 5 figures

References in corpus (2)

• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Skyrmion Lattice in a Doped Semiconductor

Cited by in corpus (10)

• Hindered magnetic order from mixed dimensionalities in CuP${}_2$O${}_6$
• Phase Diagram of the Dzyaloshinskii-Moriya Helimagnet Ba2CuGe2O7 in Canted Magnetic Fields
• Field induced phase transitions in the helimagnet Ba2CuGe2O7
• Metamagnetic transitions and magnetoelectric responses in a chiral polar helimagnet Ni${}_2$InSbO${}_6$
• Multiferroic phases of the frustrated quantum spin-chain compound linarite
• Formation of incommensurate long-range magnetic order in the Dzyaloshinskii-Moriya antiferromagnet Ba${}_2$CuGe${}_2$O${}_7$ studied by neutron diffraction
• Field-induced magnetic phase transitions and memory effect in bilayer ruthenate Ca${}_3$Ru${}_2$O${}_7$ with Fe substitution
• Multi-$Q$ magnetic phases from frustration and chiral interactions
• Vortex propagation and phase transitions in a chiral antiferromagnetic nanostripe
• Field-induced transitions from incommensurate to commensurate phases in helical antiferromagnets