Picture of athlete cycling

Open Access research with a real impact on health...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

Explore open research content by Physical Activity for Health...

Electron paramagnetic resonance and optical properties of Cr3+ doped YAl3(BO3)4

Wells, Jon-Paul R and Yamaga, Mitsuo and Han, Thomas P J and Honda, Makoto (2003) Electron paramagnetic resonance and optical properties of Cr3+ doped YAl3(BO3)4. Journal of Physics: Condensed Matter, 15 (3). pp. 539-547. ISSN 0953-8984

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


We report on the electron paramagnetic resonance (EPR) and optical absorption and fluorescence spectroscopy of YAl3(BO3)4 single crystals doped with 0.2 mol% of trivalent chromium. From EPR we determine that the Cr3+ ions reside in sites of essentially octahedral symmetry with an orthorhombic distortion. The ground state 4A2 splitting is determined to be 2(D2 + 3E2) 1.05 0.04 cm-1, where D and E are fine-structure parameters, and we can attribute this splitting to the combined effect of a low-symmetry distortion and spin-orbit coupling. The g-values and fine-structure parameters D and E of the ground state 4A2 are measured to be gx gy gz = 1.978 0.005, |D| = 0.52 0.02 cm-1 and |E| = 0.010 0.005 cm-1 respectively. From 10 K optical absorption we have measured the position and crystal-field splittings of the 2E, 2T1, 4T2, 2T2 and 4T1 states with the 4T2 and 4T1 levels appearing as vibronically broadened bands.