EPR of Tb3+, Pr3+, Gd3+, and Eu3+ ions in single crystal La2O2S
EPR of Tb3+, Pr3+, Gd3+, and Eu3+ ions in single crystal La2O2S
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单晶 La2O2S 中 Tb3 、 Pr3 、 Gd3 和 Eu3 离子的 EPR
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
P. Wigen
中科院分区：
文献类型：
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作者：
J. Jewett;P. Wigen
在低温下对单晶La₂O₂S中的一些三价稀土离子进行了电子顺磁共振测量。在约1.5 K时，观察到两组四条[I = (3/2)]的Tb³⁺谱线。当磁场平行于c轴时，位点I具有最小共振位置，并且具有以下参数：g∥ = 4.404 ± 0.008，g⊥≈0，Δ = 0.234 ± 0.004 cm⁻¹，A = 0.05 ± 0.002 cm⁻¹。位点II在ac平面内与c轴成45°方向具有最小共振位置，其参数为g∥ = 17.8，g⊥≈0，Δ = 0.18 cm⁻¹，A = 0.216 cm⁻¹。在Tb³⁺掺杂的样品中，出现了另一组六条谱线，可归因于Pr³⁺[I = (5/2)]的超精细结构。这些谱线的参数为g∥ = 4.1，g⊥≈0，Δ = 0.122 cm⁻¹，A = 0.189 cm⁻¹。还对S态离子Gd³⁺的七条精细结构谱进行了研究，其g∥ = 1.992，g⊥ = 1.994。未观察到来自Eu³⁺的信号。
Electron paramagnetic resonance measurements of some trivalent rare earth ions in single crystal La2O2S have been performed at low temperatures. At approximately 1.5 K, two sets of four [I=(3/2)] Tb+3 lines have been observed. Site I has a minimum resonance position when the magnetic field is parallel to the c axis and has the following parameters: g∥=4.404±0.008, g⊥ ≈ 0, Δ=0.234±0.004 cm−1, A=0.05±0.002 cm−1. Site II has a minimum resonance position in the a‐c plane at an orientation 45° from the c axis and has parameters g∥=17.8, g⊥≈0, Δ=0.18 cm−1, A=0.216 cm−1. In the Tb+3 doped sample, there appears another set of six lines which can be attributed to the hyperfine structure of Pr+3 [I=(5/2)]. The parameters for these lines are g∥=4.1, g⊥ ≈ 0, Δ=0.122 cm−1, A=0.189 cm−1. Studies were also made on the seven‐line fine structure spectrum for Gd+3, an S‐state ion, for which g∥=1.992 and g⊥ = 1.994. No signals from Eu3+ have been observed.