Electric-field-induced thermally detected EPR of non-Kramers ions in Al₂O₃

Thermalization of a Phonon Spectrum Observed by Frequency Crossing

“…From the sizes S of the Fe 2+ /Fe 2+ and V 3+ /V 3+ signals E and F relative to those in analyzed samples we estimate the majority and minority concentrations (Fe in V half, V in Fe half) to be, respectively, for V 3+ , 70 and <1 ppm; for Fe 2+ , 2 and 0.3 ppm, which are broadly consistent with specification if we take the Fe 2+ /Fe ratio to be -1/50 as in an as-received sample in which the Fe 2+ concentration was estimated roughly by EPR. 5 These sizes did not vary detectably with the position of the contacts showing that each half of the sample was rather homogeneous. Also, as expected, they did not depend It is clear, however, from Table I that at T" centered 6 mm from the interface the Fe 2 VV 3 + signals C, D, G, and H are considerably larger for H v injection than for H Fe injection.…”