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Alignment of defect dipoles in polycrystalline ferroelectrics
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13.Even though Ref. 1 discussed alignment of defect dipoles by cooling a reduced crystal through without an applied bias, and EPR results were mentioned, their EPR data have never been published.
14.In this letter we focus on the defect dipole complexes; however, it should be noted that other isolated centers are also observed: centers. A full account of all the defects will be published separately.
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17.This assumes that the transition probabilities are independent of orientation.
18.Electronic mail: firstname.lastname@example.orgEPR traces of the ceramic: (a) initial, (b) after a −450 V/110 °C combination for 1 h, and (c) subsequently UV illuminating at 20 K.Angular variation of the three branches of the for the complex in single crystal . Theta is the angle in degrees from the applied electric field direction. The lines are drawn as a guide to the eye. Indicated are the hypothesized weightings of the branches following alignment of the defect dipoles along the electric field direction as well as the relative intensities of the signals when the magnetic field is parallel or perpendicular to the alignment direction.Angular variation of the intensity of the =3.955 complex and the complex in polycrystalline . Theta is the angle in degrees from the applied electric field direction (alignment direction). The lines are drawn as a guide to the eye.Normalized EPR densities for the dark and UV illuminated =3.955 complex and the complex in polycrystalline as a function of bias/heat time.
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