EPR Spectroscopy of Thulium Impurities in ZnS Crystals | Zendy

Müller St. | Zendy; Dziesiaty J. | Zendy

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EPR Spectroscopy of Thulium Impurities in ZnS Crystals

Author(s) -

Müller St.,

Dziesiaty J.

Publication year - 1994

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221840222

Subject(s) - impurity , thulium , electron paramagnetic resonance , photoionization , spectroscopy , ion , materials science , atomic physics , chemistry , nuclear magnetic resonance , doping , physics , ionization , optoelectronics , organic chemistry , quantum mechanics

EPR spectroscopy is applied to Tm impurities in ZnS crystals containing Ag, Li, and La codopants. After optical irradiation, Tm 2+ resonances are observed and make it possible to separate different interstitial sites occupied by Tm 2+ , cubic sites without local charge compensation and axially distorted ones with [111] w and [001] symmetry due to charge compensation by neighboured defects. Additionally a light‐insensitive signal could be ascribed to Tm 3+ ions, occupying substitutional (Zn)sites, compensated by a negatively charged defect in 〈110〉 directions. From the photoionization spectrum the Tm 2+ state is located in the upper half of the band gap.

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