Spin Resonance of SnO2:V and the Vanadium 3d Electron Orbital

Abstract

The ESR spectrum of SnO₂ containing about 0.5% vanadium observed in K band at liquid‐nitrogen temperature shows two sets of shfs. Relative intensity measurements show that the large shfs (168 G) is due to the two tins located along the c axis and the small shfs (28 G) due to the four tins lying in a diagonal plane of the unit cell containing four oxygens. The large shfs is largely isotropic, with an axial maximum along the c axis. This suggests that the ground electron level is 3d(x²−y²). The next level is 3d(xz). This is deduced from the g values ${\mathrm{(g}}_{\mathrm{xx}}{\text{=1.939,g}}_{\mathrm{yy}}\text{=1.903,}\mathrm{and}{\mathrm{\hspace{0.17em}g}}_{\mathrm{zz}}\text{=1.943)}$ .