标题： Gd3+ 在氧化和还原气氛中热处理后的天然锆石中的晶体场变化通过电子顺磁共振光谱监测 显示英文标题

标题： The Changed Crystal Filed of Gd3+ in Natural Zircon with Heat Treatment in Oxidizing and Reducing Atmosphere Monitor by ESR Spectroscopy

摘要： 本研究的主要目的是致力于天然锆石晶体中杂质离子如Gd3+的电子自旋共振（ESR）研究，因为晶体中杂质离子的存在通常会导致晶体呈现颜色。 由于杂质离子的环境，将计算塞曼相互作用、弱超精细相互作用和晶体场相互作用。 此外，ESR谱中的共振磁场位置与施加磁场方向之间的关系将反映杂质离子位点的对称性。 热处理后不同气氛下锆石的晶体场参数的变化与锆石颜色的变化有关。 显示英文摘要

摘要： The main purpose of this research is dedicated to the ESR study of the impurity ions such as Gd3+ in the natural zircon crystal because the presence of the impurity ions in the crystal usually causes color in crystal. The Zeeman interaction, the weak hyperfine interaction and the crystal field interaction due to the environments of the impurity ions will be calculated. Furthermore, the relation between the resonance magnetic field positions in the ESR spectra and the applied magnetic field directions will reflect the impurity ion site symmetry. The change in the crystal field parameters of heat-treated zircon at different atmospheres were related to the change in the color of zircon.