Magnetic anisotropy and low-energy spin waves in the dzyaloshinskii-Moriya spiral magnet Ba2CuGe2O7

A. Zheludev, S. Maslov, G. Shirane, I. Tsukada, T. Masuda, K. Uchinokura, I. Zaliznyak, R. Erwin

Research output: Contribution to journalArticlepeer-review

Abstract

Neutron-diffraction and inelastic-scattering experiments are used to investigate in detail the field dependence of the magnetic structure and low-energy spin-wave spectrum of the Dzyaloshinskii-Moriya helimagnet Ba2CuGe2O7. The results suggest that the previously proposed model for the magnetism of this compound (an ideal sinusoidal spin spiral, stabilized by isotropic exchange and Dzyaloshinskii-Moriya interactions) needs to be refined. Both recent and previously published data can be quantitatively explained by taking into account the Kaplan-Shekhtman-Entin-Wohlman-Aharony term, a special magnetic anisotropy term that was predicted to always accompany Dzyaloshinskii-Moriya interactions in insulators.

Original languageEnglish (US)
Pages (from-to)11432-11444
Number of pages13
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume59
Issue number17
DOIs
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Magnetic anisotropy and low-energy spin waves in the dzyaloshinskii-Moriya spiral magnet Ba<sub>2</sub>CuGe<sub>2</sub>O<sub>7</sub>'. Together they form a unique fingerprint.

Cite this