Sang-Min Park, Mark P. Stoykovich, et al.
Advanced Materials
Review
Excess microwave ultrasonic attenuation in vacuum-heated rutile (TiO2)
Abstract
It was observed by Lange that rutile (TiO2) appropriately heated in a vacuum showed an anomalous attenuation peak for 1-GHz ultrasound. He suggested that the cause of the attenuation was some lattice defects, and not conduction electrons. By comparing the attenuations of 3-GHz ultrasound in vacuum-heated TiO2 with that in Nb-doped TiO2 we find strong evidence for Lange's conclusion. © 1974 The American Physical Society.
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