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

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 distor...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of physics. Condensed matter 2003-01, Vol.15 (3), p.539-547
Hauptverfasser: Wells, Jon-Paul R, Yamaga, Mitsuo, Han, Thomas P J, Honda, Makoto
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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 2SRD2 + 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 10K 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. Self-frequency-doubling crystals doped with rare-earth or transition-metal ions have attracted considerable interest from the scientific community because of the promise of solid state lasers employing intra-cavity, self frequency doubling. Amongst these materials, double borate crystals of the type RX3(BO3)4 have been extensively studied.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/15/3/318