EPR of radiation defects in LiBaF 3 crystals

Rogulis, U.; Ogorodnik, V.; Tale, I.; Veispals, A.

doi:10.1080/10420150215778

Cited by 4 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. All hyperfine structure lines belonging to F-type centre are well resolved contrary to previous EPR investigations of Fe doped LiBaF 3 crystals [4,5], where broad central line not belonging to an F centre overlapped spectra considerably.…”

Section: Resultscontrasting

confidence: 76%

“…1 is very strong, and the angle variations of 5° can change the spectra considerably. However, there are still close similarities with the EPR spectra of F-type centres in the Fe-doped LiBaF 3 [4,5]. Therefore we used the same model for the F-type centre as previously (Fig.…”

Section: Resultsmentioning

confidence: 70%

“…1 is simplified at the orientation of the magnetic field B || [111] and in this orientation it has nearly binomial distribution of the line intensities, similarly as in the Fe-doped crystals [4,5]. For other orientations of the magnetic field the line intensity decreases and spectrum broadens, the line separation remains nearly constant for all angles.…”

Section: Resultsmentioning

confidence: 98%

“…F-type centres in LiBaF 3 crystals were recently studied by optical [2] and magneto optical (MCD-EPR) [3] methods as well as EPR methods in Fe-doped crystal [4]; however their structure has not been completely clarified. The MCD-EPR measurements performed in [3] did not resolve hyperfine (hf) structure of the F-type centres, but in Fe activated crystal the contribution of the activator could not be excluded and spectrum overlapped with some additional unidentified lines [5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

EPR hyperfine structure of F‐type centres in pure LiBaF₃crystal

Fedotovs

Elsts

Rogulis

et al. 2007

Phys. Status Solidi (c)

Self Cite

View full text Add to dashboard Cite

We studied EPR spectra of pure LiBaF3 sample of high quality. For EPR measurements LiBaF3 sample was X‐irradiated at room temperature, however spectra could be observed at low temperatures ‐ at 77 K. All hyperfine structure lines of F‐type centre could be well resolved contrary to our earlier studies of Fe doped LiBaF3 crystal. Qualitative analysis with g‐tensor parameters derived from magneto‐optical measurements showed that the F‐type centre observed earlier by MCD‐EPR techniques is the same F‐type centre we observe with the EPR. We analyse origin of the hyperfine structure of the EPR spectra and their angular dependencies and discuss the structure of F‐type centres in the LiBaF3 crystal. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Section: Resultscontrasting

confidence: 76%

Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

EPR hyperfine structure of F‐type centres in pure LiBaF₃crystal

Fedotovs

Elsts

Rogulis

et al. 2007

Phys. Status Solidi (c)

Self Cite

View full text Add to dashboard Cite

show abstract

“…Electronic F-type color centers in pure LiBaF 3 have been studied by electron paramagnetic resonance (EPR) technique [37][38][39], optical spectroscopy [40][41][42], trap spectroscopy [43][44][45]. The luminescence bands at 300-370 nm in LiBaF 3 was attributed to charge transfer transitions between F-type and V k centers [35,36].…”

Section: Defect Luminescencementioning

confidence: 99%

Photoluminescence of monoclinic Li3AlF6 crystals under vacuum ultraviolet and soft X-ray excitations

et al. 2015

View full text Add to dashboard Cite

Using Bridgman technique we have grown monoclinic β-LiAF crystals suitable for optical studies, performed XRD-identification and Rietveld refinement of the crystal structure and carried out a photoluminescence study upon vacuum ultraviolet (VUV) and extreme ultraviolet (XUV)-excitations, using the low-temperature (T = 7.2 K) time-resolved VUV-spectroscopy technique. The intrinsic PL emission band at 340-350 nm has been identified as due to radiative recombination of self-trapped excitons. The electronic structure parameters were determined: bandgap E g ≈ 12.5 eV, energy threshold for creation of unrelaxed excitons 11.8 eV < E n < 12.5 eV. The PL emission bands at 320-325 and 450 nm were attributed to luminescence caused by lattice defects. We have discovered an efficient excitation of PL emission bands in the energy range of interband transitions (E ex > 13.5 eV), as well as in the energy range of core transitions at 130 eV. We have revealed UV-VUV PL emission bands at 170 and 208 nm due to defects. A reasonable assumptions about the origin of the UV-VUV bands were discussed.

show abstract