Inelastic neutron scattering study on anisotropic exchange and dzyaloshinsky–moriya interactions in the S= 1/2 Triangular Spin Cluster V3

Kazuki Iida, Taku J. Sato, Toshihiro Yamase

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8 Citations (Scopus)

Abstract

Inelastic neutron scattering (INS) experiments have been performed on a V3 triangular spin cluster. At the base temperature (T = 0:7 K), the INS spectrum clearly exhibits a broad peak at h ! = 0:8 meV. The peak was ascribed to the superposition of four magnetic excitations from two Stotal = 1=2 doublets to two Stotal = 3=2 doublets. From the observed peak position, width, and intensity, we confirmed a model Hamiltonian comprising anisotropic exchange and Dzyaloshinsky–Moriya (DM) interactions, and estimated the Hamiltonian parameters as Jx = Jy = 5:73 K, Jz = 6:83 K, Dz1;2 = 0:261 K, and Dz2;3 = Dz3;1 = 0:287 K, where J is the -component of the exchange interactions and Dzi; j represents the z-component of the DM vector between the i-th and j-th V ions. The resulting model Hamiltonian successfully reproduced the half-step magnetization process reported earlier as well as magnetic susceptibility.

Original languageEnglish
Article number114709
Journaljournal of the physical society of japan
Volume78
Issue number11
DOIs
Publication statusPublished - 2009 Nov

Keywords

  • Dzyaloshinsky–Moriya
  • Inelastic neutron scattering
  • Molecular nanomagnet
  • Spin trimer system

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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