An electron paramagnetic resonance study on Sm3+ and Yb3+ in KY3F10 crystals

M. Yamaga, M. Honda, J.-P.R. Wells, T.P.J. Han, H.G. Gallagher

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Abstract

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.
LanguageEnglish
Pages8727-8736
Number of pages10
JournalJournal of Physics: Condensed Matter
Volume12
Issue number40
DOIs
Publication statusPublished - 9 Oct 2000

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Paramagnetic resonance
Hamiltonians
electron paramagnetic resonance
fine structure
crystal field theory
Excited states
Crystals
crystals
Optical transitions
Microwave frequencies
Crystal symmetry
Eigenvalues and eigenfunctions
perturbation
microwave frequencies
superhigh frequencies
resonance lines
optical transition
Single crystals
Ions
excitation

Keywords

  • crystal field interactions
  • eigenvalues and eigenfunctions
  • g-factor
  • ground states
  • paramagnetic resonance
  • potassium compounds
  • samarium
  • spin Hamiltonians
  • ytterbium
  • yttrium compounds

Cite this

Yamaga, M. ; Honda, M. ; Wells, J.-P.R. ; Han, T.P.J. ; Gallagher, H.G. / An electron paramagnetic resonance study on Sm3+ and Yb3+ in KY3F10 crystals. In: Journal of Physics: Condensed Matter . 2000 ; Vol. 12, No. 40. pp. 8727-8736.
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abstract = "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.",
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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 journalArticle

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 -