Premium
Theory of the intrinsically strain broadened line shape for magnetic resonance absorption within the non‐kramers doublet of Al 2 O 3 :Fe 2+
Author(s) -
Bowden C. M.,
Meyer H. C.,
Donoho P. L.
Publication year - 2009
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560050743
Subject(s) - dielectric , condensed matter physics , lattice (music) , impurity , electron paramagnetic resonance , absorption (acoustics) , coupling (piping) , crystal (programming language) , materials science , ion , chemistry , nuclear magnetic resonance , physics , optoelectronics , organic chemistry , computer science , acoustics , metallurgy , composite material , programming language
A theoretical model is presented for the intrinsically strain broadened line shape for magnetic resonance absorption in Al 2 O 3 :Fe 2+ . The model predicts an asymmetric broadening as a result of local crystal field perturbations due to crystal imperfections. A very good fit was obtained in comparing the theoretical model with the results of acoustical paramagnetic resonance studies reported recently by Lewiner, Meijer, and Wigmore [1]. The homogeneous and inhomogeneous broadening parameters in the model were evaluated from the comparison and the results for paraelectric absorption are predicted. Further, uniaxial stress boundary conditions were introduced into the model, and the results for paraelectric absorption with applied uniaxial stress is predicted, using the strength of the spin‐lattice coupling based on the results from Bibliography [1]. The spin‐lattice coupling coefficients were treated in the model as adjustable parameters, and thus the comparison of the model with the results of uniaxial stress experiments for paraelectric absorption offers a means for evaluating the strength of the spin‐lattice coupling independent of the concentration of the impurity ion.