The effect of uniaxial stress on the electron paramagnetic resonance of ruby
McDonald, Edward Donian
Donoho, Paul L.
Master of Arts
The effect of uniaxial stress on the EPR lines in 0.05% ruby may be described by the addition of a term to the spin Hamiltonian of the form. The components of the G-tensor may be ascertained from the shift of the resonance field with strain at various directions in the crystal as a function of the angle between the applied magnetic field and the c-axis of the crystal. The strain in the sample is measured using four strain gages; one bonded to each side of the sample. Linear shifts of the lines have been measured for all observable transitions at 9.9 Gc on samples with four different stress-axes. The results were fitted to the theory by a least-squares analysis, yielding the following values for the independent components of G' and G" (in Voigt-reduced notation and units of Gc/unit strain).