Abstract
| Language | English |
|---|---|
| Pages | 8727-8736 |
| Number of pages | 10 |
| Journal | Journal of Physics: Condensed Matter |
| Volume | 12 |
| Issue number | 40 |
| DOIs | |
| Publication status | Published - 9 Oct 2000 |
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Keywords
- crystal field interactions
- eigenvalues and eigenfunctions
- g-factor
- ground states
- paramagnetic resonance
- potassium compounds
- samarium
- spin Hamiltonians
- ytterbium
- yttrium compounds
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An electron paramagnetic resonance study on Sm3+ and Yb3+ in KY3F10 crystals. / Yamaga, M.; Honda, M.; Wells, J.-P.R.; Han, T.P.J.; Gallagher, H.G.
In: Journal of Physics: Condensed Matter , Vol. 12, No. 40, 09.10.2000, p. 8727-8736.Research output: Contribution to journal › Article
TY - JOUR
T1 - An electron paramagnetic resonance study on Sm3+ and Yb3+ in KY3F10 crystals
AU - Yamaga, M.
AU - Honda, M.
AU - Wells, J.-P.R.
AU - Han, T.P.J.
AU - Gallagher, H.G.
PY - 2000/10/9
Y1 - 2000/10/9
N2 - Electron paramagnetic resonance (EPR) spectra of Sm3+ and Yb3+ ions in KY3F10 single crystals have been measured at X-band microwave frequencies and low temperatures. The EPR lines have been fitted to a tetragonal spin Hamiltonian to determine effective g-values (g, g). The observed g-values, (g=0.714(2), g=0.11(1)), for Sm3+ are in agreement with those calculated via crystal-field J-mixing of the first excited-state multiplet 6H7/2 into the groundstate multiplet 6H5/2 of Sm3+ as the second-order perturbation. On the other hand, the observed g-values, (g=5.363(5), g=1.306(2)) for Yb3+ are coincident with those calculated via mixing in only the groundstate multiplet 2F7/2 as the first-order perturbation because the first excited-state multiplet 2F5/2 lies above ~10 000 cm-1 from the groundstate. The groundstate eigenfunctions of Sm3+ and Yb3+ obtained from the EPR results are close to those calculated from a C4v symmetry crystal-field analysis applied to their optical transitions. The distortions of the Sm3+ and Yb3+ complexes in KY3F10 are discussed in the term of the crystal-field Hamiltonian in comparison with LiYF4.
AB - Electron paramagnetic resonance (EPR) spectra of Sm3+ and Yb3+ ions in KY3F10 single crystals have been measured at X-band microwave frequencies and low temperatures. The EPR lines have been fitted to a tetragonal spin Hamiltonian to determine effective g-values (g, g). The observed g-values, (g=0.714(2), g=0.11(1)), for Sm3+ are in agreement with those calculated via crystal-field J-mixing of the first excited-state multiplet 6H7/2 into the groundstate multiplet 6H5/2 of Sm3+ as the second-order perturbation. On the other hand, the observed g-values, (g=5.363(5), g=1.306(2)) for Yb3+ are coincident with those calculated via mixing in only the groundstate multiplet 2F7/2 as the first-order perturbation because the first excited-state multiplet 2F5/2 lies above ~10 000 cm-1 from the groundstate. The groundstate eigenfunctions of Sm3+ and Yb3+ obtained from the EPR results are close to those calculated from a C4v symmetry crystal-field analysis applied to their optical transitions. The distortions of the Sm3+ and Yb3+ complexes in KY3F10 are discussed in the term of the crystal-field Hamiltonian in comparison with LiYF4.
KW - crystal field interactions
KW - eigenvalues and eigenfunctions
KW - g-factor
KW - ground states
KW - paramagnetic resonance
KW - potassium compounds
KW - samarium
KW - spin Hamiltonians
KW - ytterbium
KW - yttrium compounds
U2 - 10.1088/0953-8984/12/40/314
DO - 10.1088/0953-8984/12/40/314
M3 - Article
VL - 12
SP - 8727
EP - 8736
JO - Journal of Physics: Condensed Matter
T2 - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 40
ER -