Optically and thermally driven bistability of FH(OH−) centres in KBr: Structure of the bistable configurations

H Söthe,J.-M Spaeth,F Luty

doi:10.1080/10420159108224887

Optically and thermally driven bistability of FH(OH−) centres in KBr: Structure of the bistable configurations

H Söthe, J.-M Spaeth + Show 1 more

https://doi.org/10.1080/10420159108224887

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Journal: Radiation Effects and Defects in Solids	Publication Date: Nov 1, 1991
Citations: 7

Affiliation: Paderborn University

#Thermal Bistability #Centres In KBr + Show 8 more

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Abstract

Abstract Pairs of F centres and OH− molecules (FH(OH−) centres) exhibit a very interesting optical and thermal bistability in KBr. The analysis of our Electron Nuclear Double Resonance (ENDOR) investigation yields structure models. In both bistable configurations the OH− molecules reside on a next nearest anion site (4th shell) relative to the F centre. The difference lies in the orientation of the OH− dipole with respect to the defect pair axis. The thermal bistability will be explained tentatively as being entropy-driven.

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