Microscopic spin-Hamiltonian parameters and crystal field energy levels for the low C₃ symmetry Ni²⁺ centre in LiNbO₃ crystals

Zi Yuan YANG, Czeslaw RUDOWICZ, Yau Yuen YEUNG

Research output: Contribution to journalArticles

72 Citations (Scopus)

Abstract

The microscopic spin-Hamiltonian (MSH) parameters and the crystal field (CF) energy levels for Ni²⁺ ions in LiNbO₃crystals have been investigated using the crystal field analysis/microscopic spin-Hamiltonian package recently developed. The investigations considered for the first time the spin–spin (SS) and spin-other-orbit (SOO) interactions. The low-symmetry effects (LSE) arising from the additional terms (Im(B₄₃)≠0) induced at the C₃symmetry sites by the distortion angle ϕ, which have been omitted in earlier works, have also been dealt with. This study shows that for LiNbO₃: Ni²⁺ the contributions arising from SS and SOO interactions to the zero-field splitting parameter D are appreciable, whereas those to g∥ and g⟂ are quite small. Since the distortion angle ϕ (≅0.68°) for LiNbO₃: Ni²⁺ is rather small, the contributions to the spin-Hamiltonian (SH) parameters arising from LSE are also small. Feasibility of application of the superposition model is also discussed. A good overall agreement between the theoretical and experimental results for the SH parameters and the CF energy levels has been obtained. Copyright © 2003 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)151-159
JournalPhysica B: Condensed Matter
Volume348
Issue number1-4
DOIs
Publication statusPublished - May 2004

Citation

Yang, Z.-Y., Rudowicz, C., & Yeung, Y.-Y. (2004). Microscopic spin-Hamiltonian parameters and crystal field energy levels for the low C₃ symmetry Ni²⁺ centre in LiNbO₃ crystals. Physica B: Condensed Matter. 348(1-4), 151-159.

Keywords

  • Microscopic spin-Hamiltonian (MSH) parameters
  • Spin–spin (SS) interaction
  • Spin-other-orbit (SOO) interaction
  • LiNbO3: Ni2+ crystals
  • Low symmetry effects (LSE)

Fingerprint Dive into the research topics of 'Microscopic spin-Hamiltonian parameters and crystal field energy levels for the low C₃ symmetry Ni²⁺ centre in LiNbO₃ crystals'. Together they form a unique fingerprint.