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Amorphous KNbO3 thin films with ferroelectric like properties
Amorphous KNbO3 films are prepared by a low-cost sol–gel method. These films show a smooth surface morphology and have good waveguiding properties. Ferroelecticlike hysteresis loops are observed in these amorphous KNbO3 ...
Temperature dependence of excitonic energy in isolated Se chains formed in the channels of AlPO4-5 crystals
Optical absorption spectra of Se chains formed in channels of AlPO4-5 (AFI) crystals are measured in the temperature range from 80 to 298 K. The excitonic energy of the isolated Se chains is observed to shift to lower ...