Magnetic interactions and spin waves in LiCu$_2$O$_2$

ORAL

Abstract

Magnetic excitations in the spiral magnet LiCu$_2$O$_2$ are studied by thermal and cold neutron scattering techniques. The spin models are discussed based on coupled ladder model including four exchange parameters; rung interaction $J_1$, nearest neighbor inchain interaction $J_2$, next-nearest neighbor inchain interaction $J_4$, and inter-ladder coupling $J_ {\perp}$. The magnetic dispersion suggests that antiferromagnetic $J_1$, {\it ferromagnetic $J_2$}, and antiferromagnetic $J_4$ induce frustration in this compound. Weak inter-ladder coupling was also observed. This work was carried out under DOE Contract No. DE-AC05-00OR22725.

–

Authors

  • A. Zheludev

  • T. Masuda

    • Condensed Matter Sciences Division, Oak Ridge National Laboratory

  • B. Roessli

    • Laboratory for Neutron Scattering, ETH Zurigh and Paul Scherrer Institute

  • A. Bush

    • Moscow Institute of Radiotechnics, Electrinics and Automation

  • M. Markina

  • A. Vasiliev

    • Low Temperature Physics Department, Moscos State University