Fe1+ and charge transfer in ZnS. analysis of source experiments results

Gérard, André; Lerho, M.

doi:10.1007/bf02399489

Cited by 16 publications

(2 citation statements)

References 10 publications

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“…discussion in Ref. [20]). The β − decay of 57 Mn on the other hand does not alter the electronic structure significantly and the creation of unusual charge states is unlikely.…”

Section: Discussionmentioning

confidence: 94%

Mössbauer spectroscopy of 57Fe in α-Al2O3 following implantation of 57Mn*

et al. 2010

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The valence state and annealing reactions of Mn/Fe in single crystalline α-Al 2 O 3 have been determined following low fluence (<10 12 cm −2 ) 60 keV implantations of 57 Mn + (T 1/2 = 1.5 min) and emission Mössbauer spectroscopy on the 57m Fe daughter nuclei in the temperature range from 110-700 K. At 110 K, most probe atoms are found in the Fe 2+ state in amorphous surroundings due to the implantation damage. A fraction of the Fe is found in cubic environment, possibly nano-precipitates of η-Al 2 O 3 . This site is found to disappear from the

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“…discussion in Ref. [20]). The β − decay of 57 Mn on the other hand does not alter the electronic structure significantly and the creation of unusual charge states is unlikely.…”

Section: Discussionmentioning

confidence: 94%

Mössbauer spectroscopy of 57Fe in α-Al2O3 following implantation of 57Mn*

et al. 2010

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“…The effective Debye temperature is thus found to be the same for both Fel + and Fe2+ in ZnS, and therefore the Fe1+ ions seem to belong to ZnS bulk. The abrupt disappearance of the Fe1+ single line at 255 K is attributed to the transient character of this ion in this semi-conducting matrix, with the Fel + life time becoming much smaller than the nuclear life time T. for T > 255 K. Both MES [4,19] and optical excitation measurements [20] in ZnS show that the Fe1+ ions transform into Fe2 + ions by giving an electron to the conduction band, through a 0.2 eV energy activation process.…”

Section: (B) Contribution Emitted By Non Cubic Site Fe2 + Ionsmentioning

confidence: 93%

Mössbauer absorption and emission experiments in CaF2(57Fe): relaxation and after-effect study

Garcin¹,

Imbert²,

Jéhanno³

et al. 1986

J. Phys. France

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La totalité du spectre d'absorption Mössbauer d'impuretés de 57Fe dans CaF2 et la plus grande partie du spectre Mössbauer émis par une source de 57Co dans CaF2 (échantillon en poudre) proviennent d'ions Fe2+ substitués en site cubique. Une faible contribution provenant de l'état de charge Fe1+ (3d7) est également détectée dans les spectres d'émission, mais on n'y observe pas de contribution de type Fe3+. Le spectre émis par les ions Fe2 + en site cubique comporte à basse température deux contributions issues de niveaux électroniques excités, à long temps de vie, et peuplés hors équilibre thermique. La première de celles-ci émane du triplet de spin-orbit 5E-03934 de faible énergie (E ~ 16 cm-1), dont les propriétés de relaxation ont été analysées d'autre part en spectrométrie d'absorption. La seconde émane probablement du niveau excité 5T2 -03935g de grande énergie (E ~ 5 000 cm-1).Abstract. -The entire Mössbauer absorption spectrum of 57Fe impurities in CaF2 and the main part of the emission spectrum of a CaF2 (57Co) powder sample originate from substitutional Fe2+ ions in cubic sites. A weak Fe1+ (3d7) charge state contribution is also detected in the emission spectra, but no Fe3+ contribution is observed. Two long-lived excited electronic level contributions are evidenced out of the thermal equilibrium in the low temperature emission spectra of the cubic site Fe2+ ions. The first originates from the low energy spin-orbit triplet 5E -03934 (E ~ 16 cm-1), whose relaxation properties are also analysed by absorption spectroscopy, and the second probably originates from the highly excited level 5T2 -03935g (E ~ 5 000 cm-1).

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Zinc sulfide (ZnS) ionization energies of deep impurities

Landolt-Börnstein - Group III Condensed Matter

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Fe1+ and charge transfer in ZnS. analysis of source experiments results

Cited by 16 publications

References 10 publications

Mössbauer spectroscopy of 57Fe in α-Al2O3 following implantation of 57Mn*

Mössbauer spectroscopy of 57Fe in α-Al2O3 following implantation of 57Mn*

Mössbauer absorption and emission experiments in CaF2(57Fe): relaxation and after-effect study

Zinc sulfide (ZnS) ionization energies of deep impurities

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