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INVESTIGATIONS ON THE SPIN HAMILTONIAN PARAMETERS FOR Nd³⁺ IN ThGeO₄

Department of Applied Physics, University of Electronic Science & Technology of China, Chengdu 610054, People's Republic of China

International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China

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HUI-NING DONG

International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China

Institute of Applied Physics, Chongqing University of Posts and Telecommunications, Chongqing 400065, People's Republic of China

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https://doi.org/10.1142/S0217979207036503Cited by:0 (Source: Crossref)

Abstract

The spin Hamiltonian parameters, g factors g_‖ and g_⊥, for Nd³⁺ in ThGeO₄ are theoretically investigated from the perturbation formulas of the g factors for a 4f³ ion in tetragonal symmetry. In these formulas, the contributions to the g factors from the second-order perturbation terms and the admixture of various states are taken into account. It is found that the calculated g factors of this work are smaller than the experimental results, but close to those in the previous theoretical studies by Gutowska et al. Moreover, the calculated hyperfine structure constants A_‖ and A_⊥ as well as the energies of the ⁴I_9/2 Stark levels in this work are also consistent with those in the previous investigations. The discrepancy between theoretical and experimental g factors is discussed.

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