Breakdown of an intermediate plateau in the magnetization process of anisotropic spin-1 Heisenberg dimer: Theory vs. experiment

J. Strečka, M. Hagiwara, P. Baláž, M. Jaščur, Y. Narumi, S. Kimura, J. Kuchár, K. Kindo

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The magnetization process of the spin-1 Heisenberg dimer model with the uniaxial or biaxial single-ion anisotropy is particularly investigated in connection with recent experimental high-field measurements performed on the single-crystal sample of the homodinuclear nickel(II) compound [Ni2 (Medpt)2 (μ - ox) (H2 O)2] (ClO4)2 · 2 H2 O (Medpt=methyl-bis(3-aminopropyl)amine). The results obtained from the exact numerical diagonalization indicate a striking magnetization process with a marked spatial dependence on the applied magnetic field for arbitrary but finite single-ion anisotropy. It is demonstrated that the field range, which corresponds to an intermediate magnetization plateau emerging at a half of the saturation magnetization, basically depends on a single-ion anisotropy strength as well as a spatial orientation of the applied field. The breakdown of the intermediate magnetization plateau is discussed at length in relation to the single-ion anisotropy strength.

Original languageEnglish
Pages (from-to)3146-3153
Number of pages8
JournalPhysica B: Condensed Matter
Volume403
Issue number18
DOIs
Publication statusPublished - 2008 Sep 1

Keywords

  • Exact diagonalization
  • Heisenberg dimer
  • Magnetization plateau

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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