On the Dependence of the Electron Paramagnetic Resonance Line Intensities on the Microwave Field Orientation

Kira Seleznyova (1, 2) , Sergey Yagupov (2) , Mark Strugatsky (2) , Janis Kliava (1)

1 LOMA - Laboratoire Ondes et Matière d'Aquitaine
2 Faculty of Physics and Computer Sciences [Simferopol]

Electron paramagnetic resonance (EPR) spectra of Ni-doped gallium borate show a surprisingly pronounced dependence of certain line intensities on the orientation of the microwave field B 1 with respect to the crystal axes. In order to account for this dependence, we have considered in detail the B 1 caused perturbation matrix and obtained an expression of the angular dependence of transition probabilities between spin levels. Computer-generated EPR spectra taking into account this dependence provide good fits to the experimental spectra characteristics.

Domaines: Autre [cond-mat.other]; Physique mathématique [math-ph]

Kira Seleznyova, Sergey Yagupov, Mark Strugatsky, Janis Kliava. On the Dependence of the Electron Paramagnetic Resonance Line Intensities on the Microwave Field Orientation. Applied Magnetic Resonance, 2015, 46 (11), pp.1323-1330. ⟨10.1007/s00723-015-0723-y⟩. ⟨hal-01229373⟩