Picture of virus under microscope

Research under the microscope...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

Explore SIPBS research

Investigation on the valence of Cr ions in LiAlO2

Yamaga, M. and Wells, J.P.R. and Honda, M. and Han, T.P.J. and Henderson, B. (2004) Investigation on the valence of Cr ions in LiAlO2. Journal of Luminescence, 108. pp. 313-317. ISSN 0022-2313

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The angular dependence of the electron paramagnetic resonance (EPR) spectra of Cr:LiAlO2 does not fit Cr4+ with S=1, but rather Cr3+ with S ¼ 3 2: The energy level (740 cm1) of the first excited state estimated from the temperature dependence of the EPR line width is consistent with the energy separation between two groups of zero-phonon lines in the near-infrared luminescence observed at 10 K. The paramagnetic center observed by the EPR technique is the same as the optically active center. These results suggest the possibility that trivalent chromium ions substitute for trivalent aluminum ions in LiAlO2 with tetrahedral symmetry, without local charge compensators.