Optical Properties Related to Electrical Switching of Li Doped NiO Crystals.
Abstract
The optical absorption and electrical conductivity of single crystals of NiO and Li doped NiO crystals were studied. Changes in the electrical conductivity induced by an electrical field were measured. Charge transport mechanisms in NiO were extensively investigated. The optical spectrum of some samples displaying reversible and irreversible changes in resistivity before and after switching are given. The ratio of the resistivities between the 'On' and 'Off' states ranged between X6 and X20 for various samples. Differential dynamic measurements did not show any changes in optical transmission during switching, within the experimental accuracy stated. No transmission changes were detected over the whole spectral range (500 to 1100 nm) although the resistance switched by a factor of 30. The absence of such change in transmission indicates that the relation between the absorption coefficient and the conduction mechanism of the electrical switching is different from the one for increased defect concentration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADA124299
Entities
People
- Judith Bransky
Organizations
- Wright Laboratory