Vanadium States in Doped Bi12SiO20

• Main Authors: Petya Petkova, Petko VASILEV, Mustafa MUSTAFA, Ivaylo PARUSHEV
• Format: Article
• Language: English
• Published: Kaunas University of Technology 2015-06-01
• Series: Medžiagotyra
• Subjects: vanadium doped sillenites; oxygen tetrahedra; Racah parameters; Jahn-Teller effect; spin-orbit interaction
• Online Access: http://matsc.ktu.lt/index.php/MatSc/article/view/6140

<p>We have investigated the absorption of the V doped Bi₁₂SiO₂₀ in the spectral region 1.45-2 eV (11 696 – 16 129 cm^-1). The observed absorption bands are due to the V²⁺, V³⁺ and V⁴⁺ ions in the same spectral region. These absorption bands do not contain information about the exact energy position of the vanadium levels. Therefore, we have calculated the second derivative of absorption. It is established that all vanadium ions are surrounded by distorted tetrahedral coordination in Bi₁₂SiO₂₀ (BSO). The energy level structures of the vanadium ions in BSO are also presented. We have calculated the field parameters Dqand the Racah parameters B and C for V²⁺ ion. We have determined the field parameters Dq, Ds and Dt for V³⁺ ion.</p><p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.21.2.6140">http://dx.doi.org/10.5755/j01.ms.21.2.6140</a></p>