EPR studies of the valence states of thulium in thulium monochalcogenides
We have studied the Gd/sup 3 +/ EPR at 9.2 HGz in 0.1 at % GdS in TmS, 1 at % GdTe in TmTe, and 1 at % GdSe in TmSe. From the temperature dependence of the Gd/sup 3 +/ linewidth we have concluded that Tm in TmS is trivalent. The temperature variation of the Gd/sup 3 +/ linewidth in TmTe has been interpreted as the result of the ''delocalization'' of the extra electron ''localized'' around Gd/sup 3 +/. The g-value and linewidth data are consistent with the identification that Tm in TmTe is divalent. The linewidth and the g-value of the Gd/sup 3 +/ resonance in the TmSe have been found to be temperature independent. These striking results have been attributed to the ''motional narrowing'' effect arising from valence fluctuations of Tm in TmSe.
- Research Organization:
- Los Alamos Scientific Laboratory, Los Alamos, New Mexico
- OSTI ID:
- 7078532
- Journal Information:
- J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 28:3; ISSN JLTPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ATOMIC IONS
CHALCOGENIDES
CHARGED PARTICLES
ELECTRON SPIN RESONANCE
ELECTRONIC STRUCTURE
GADOLINIUM COMPOUNDS
GADOLINIUM IONS
GADOLINIUM SELENIDES
GADOLINIUM SULFIDES
GADOLINIUM TELLURIDES
GYROMAGNETIC RATIO
IONS
MAGNETIC RESONANCE
RARE EARTH COMPOUNDS
RESONANCE
SELENIDES
SELENIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TELLURIDES
TELLURIUM COMPOUNDS
THULIUM COMPOUNDS
THULIUM IONS
THULIUM SELENIDES
THULIUM SULFIDES
THULIUM TELLURIDES
TRACE AMOUNTS
VALENCE