Observation of Hyperfine Splitting of the Levels of V3+ Ions and Pairs by Phonon Spectroscopy
In principle, frequency crossing spectroscopy1 has a resolution limited only by the linewidths of the levels involved. In the present work measurements have been made on V3+ in Al2O3 with a resolution ⪝ 100 MHz at a crossing frequency of 166 GHz. Measurements of thermal resistivity W have been made for fields along the c-axis near the crossing point at B ∿ 3.1T between the ΔM = 1 and ΔM = 2 transition frequencies of V3+: υ1 = D - g‖βB - AHIZ and υ2 = 2g‖βB + 2AHIZ where D = 249 GHz, g‖ = 1.912, AH = 288 ± 2 MHz3 and I = 7/2. Both frequencies have 8 hyperfine components which are split by AH and 2AH respectively. If these components are well resolved signal ΔW/Wo obtained by crossing them has 21 lines separated by AH.
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- 1.Wybourne M N, Jefferies D J and Challis L J, submitted for publication. This paper includes references to earlier measurements of frequency crossing spectroscopy.Google Scholar
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- 4.We are very grateful to Dr de Goer, Professor J Joffrin and Professor H Kinder for providing the samples.Google Scholar
- 5.These are the data of the present authors shown in Challis L J, Journal de Physique 39 - C6, 1553 (1978).Google Scholar