α-Al2O3单晶中Fe3+离子的电子顺磁共振

本文对α-Al₂O₃单晶体中Fe³⁺离子在室温下,X波段进行了电子顺磁共振研究,发现Fe³⁺离子实际上占据四种磁性不等价晶位。在同一氧离子层间的两种晶位上的Fe³⁺离子具有相同的自旋哈密顿参量,而不同氧离子层间的晶位上的Fe³⁺离子具有不同的自旋哈密顿参量,两种自旋哈密顿参量为:(1)g_‖=2.001,g_⊥=2.003,D=1679 关键词：

THE ELECTRON PARAMAGNETIC RESONANCE STUDY OF Fe ION IN α-Al2O3 SINGLE CRYSTAL

The electron paramagnetic resonance of Fe³⁺ ion in α-Al₂O₃ single crystal has been studies at room temperature in x-band. It is found that Fe³⁺ ions occupy actually four magnetically unequivalent sites. The Fe³⁺ ions in two kinds of sites between adjacent planes of oxygens have same Spin Hamiltonian Parameters (SHP), but have different SHP in the sites between next adjacent planes of oxygens. Two groups of SHP are: (1) g_‖=2.001, g_⊥= 2.003, D= 1679×10^-4 cm^-1, |a| =237×l0^-4cm^-1, a-F = 317×10^-4cm^-1. (2) g_‖ = 2.001, g_⊥= 2.006, D=l660×10^-4cm^-1, |a| = 243×10^-4cm^-1, a-F=338×10^-4cm^-1.