En este trabajo se estudia las modificaciones sufridas por el Antimoneto de Indio (InSb), crecido en la dirección [100], cuando es sometido a testes de micro-indentación mecánica, altas presiones hidrostáticas y presión por impacto. Los estudios topográficos y tomográficos de las muestras fueron hechos por medio de espectroscopia micro-Raman con diferentes longitudes de onda de la luz de excitación. El corrimiento de la posición de los fonones y el surgimiento de nuevos picos Raman permite el análisis tanto químico como estructural del sistema en estudio.

This paper studies the modifications suffered by the Indium Antimonnide (InSb), grown in the [100], when subjected to mechanical tests of micro-indentations, high hydrostatic pressure and pressure impact. Tomographic surveying and samples were made by micro-Raman spectroscopy with different wavelengths of excitation light. The shift of the position of the phonons and the emergence of new Raman peaks allow both chemical and structural analysis of the system.

The ferroelectric compound LiNbO3 was prepared by the polymeric precursors method in the polycrystalline form containing different concentrations of Eu3+. The compounds were characterized by X-ray diffraction, vibrational and electronic spectroscopy. Electronic spectroscopy was shown to be sensitive to small concentrations of contaminating phases allowing a good control of the compound purity. The presence of Eu3+ ions leads to the formation of the LiNb3O8 phase in the range of 500 to 800 °C. Above this temperature range LiNbO3 and tetragonal (T') EuNbO4 were obtained.