Electron paramagnetic resonance of Fe3+ ions in borate glass: computer simulations
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | YAHIAOUI, E. M. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | BERGER, R. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | SERVANT, Y. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | KLIAVA, J. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | DUGUNOV, L. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | MEDNIS, A. | |
| dc.date.issued | 1994-10-31 | |
| dc.identifier.issn | 0953-8984 | |
| dc.description.abstractEn | Computer simulations of Fe3+ electron paramagnetic resonance spectra at X (9.5 GHz) and Q (34 GHz) bands in the alkali borate glass Li2O-2B2O3 doped with Fe2O3 have been carried out using an approach based on the eigenfield method applied to the 'rhombic' spin Hamiltonian, which contains only the Zeeman and quadrupole fine-structure terms. In order to account for the structural disorder in the glass, two different distribution densities of fine-structure parameters D and E have been tried: a two-dimensional Gaussian function of D and lambda = mod E/D mod , and the 'Czjzek function', analogous to the one used in Mossbauer-effect studies. In simulating the experimental spectra, care has been taken to fit not only to the most prominent features arising at gef approximately=4.3 (at X and Q bands) and gef approximately=2.0 (at Q band), but also to an obvious plateau of the derivative of the absorption, which extends down to the magnetic field corresponding to gef approximately=9.7 (at both bands). As a result, the Czjzek function can be ruled out. The agreement between the experimental and computer-simulated spectra found with the Gaussian distribution density suggests the existence, besides orthorhombic symmetry sites (with lambda approximately=1/3), of a considerable number of Fe3+ sites with axial or feebly rhombic distortions ( lambda <or=0.08). The relatively high mean value of the axial fine-structure parameter D is consistent with a highly distorted environment of Fe3+ ions in the glass. | |
| dc.language.iso | en | |
| dc.publisher | IOP Publishing | |
| dc.title.en | Electron paramagnetic resonance of Fe3+ ions in borate glass: computer simulations | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1088/0953-8984/6/44/020 | |
| dc.subject.hal | Physique [physics] | |
| bordeaux.journal | Journal of Physics: Condensed Matter | |
| bordeaux.page | 9415-9428 | |
| bordeaux.volume | 6 | |
| bordeaux.issue | 44 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01549872 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01549872v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Physics:%20Condensed%20Matter&rft.date=1994-10-31&rft.volume=6&rft.issue=44&rft.spage=9415-9428&rft.epage=9415-9428&rft.eissn=0953-8984&rft.issn=0953-8984&rft.au=YAHIAOUI,%20E.%20M.&BERGER,%20R.&SERVANT,%20Y.&KLIAVA,%20J.&DUGUNOV,%20L.&rft.genre=article |
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