Spin waves and the origin of commensurate magnetism inBa2CoGe2O7

2003/02/27 by A. Zheludev, T. Sato, T. Masuda +4 · 63 citations
Chemistry · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Antiferromagnetism #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Diffraction #Dispersion relation #Ferromagnetism #Inelastic neutron scattering #Isostructural #Magnetic properties of thin films #Magnetism #Neutron diffraction #Neutron scattering #Optics #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Scattering #Spin (aerodynamics) #Spin wave #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.68.024428

published in Physical review. B, Condensed matter 68(2) (American Physical Society) · 5 pages 3 figures, submitted to Phys. Rev. B

arxiv created 2003/02/27 · openalex publication_date 2003/07/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The square-lattice antiferromagnet Ba₂CoGe₂O₇ is studied by means of neutron diffraction and inelastic scattering. This material is isostructural to the well-known Dzyaloshinskii-Moriya helimagnet Ba₂CuGe₂O₇ but exhibits commensurate long-range N'eel order at low temperatures. Measurements of the spin wave dispersion relation reveal strong in-plane anisotropy that is the likely reason for the suppression of helimagnetism.

Citations

• Experimental Evidence for Kaplan–Shekhtman–Entin-Wohlman–Aharony Interactions inBa2CuGe2O7
• Intermediate phase in the spiral antiferromagnetBa2CuGe2O7
• Field-Induced Commensurate-Incommensurate Phase Transition in a Dzyaloshinskii-Moriya Spiral Antiferromagnet
• Anisotropic Superexchange Interaction and Weak Ferromagnetism