Abstract

The perovskite-structured titanates and zirconates have been extensively investigated using infrared and Raman spectroscopy. However, very few papers have been published related to the vibrational spectra of hafnium-containing compounds. McDevitt and Baun reported the infrared absorption spectrum of hafnium dioxide, while Perry investigated PbHfO₃ and SrHfO₃ by the infrared reflection technique. This lack of data is unusual when one considers the potential electronic and high temperature applications of such hafnium-containing compounds. One must have adequate techniques for characterizing and identifying a material before one can prepare the material with optimum desired properties. Therefore, in this investigation we have measured the Raman spectra of several perovskite-structured alkaline earth hafnates (BaHfO₃, CaHfO₃, and SrHfO₃) and analyzed the resulting spectra on the basis of their crystal structures.

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