Spin waves and the origin of commensurate magnetism in Ba2CoGe2O7

A. Zheludev; T. Sato; T. Masuda; K. Uchinokura; G. Shirane; B. Roessli

doi:10.1103/PhysRevB.68.024428

Spin waves and the origin of commensurate magnetism in Ba2CoGe2O7

Strongly Correlated Electrons 2009-11-10 v1

Authors: A. Zheludev , T. Sato , T. Masuda , K. Uchinokura , G. Shirane , B. Roessli

View on arXiv ↗ PDF ↗ DOI ↗

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 Neel 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.

Keywords

spin waves commensurate magnetism neel order anisotropy Ba2CoGe2O7

Cite

@article{arxiv.cond-mat/0302592,
  title  = {Spin waves and the origin of commensurate magnetism in Ba2CoGe2O7},
  author = {A. Zheludev and T. Sato and T. Masuda and K. Uchinokura and G. Shirane and B. Roessli},
  journal= {arXiv preprint arXiv:cond-mat/0302592},
  year   = {2009}
}

Comments

5 pages 3 figures, submitted to Phys. Rev. B

Related papers

View all related →

Condensed Matter · Physics

The square-lattice spiral magnet Ba_2CuGe_2O_7 in an in-plane magnetic field