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Ferroelectric lead zirconium titanate (PZT) has been used in FeRAMs, which are expected to become common large capacity devices. We have extensively studied PZT thin films and their micro-processing. However, there are several problems of degradation by crystal defects at grain boundaries in thin films and surface damage by microfabrication. Self-assembled nanocrystals are useful for solving these...
The successful room temperature continuous wavelength operation of an index guided GaInP/AlGaInP double heterostructure laser diode ( lambda =670 nm) has been achieved for the first time by using the combination of gas source molecular beam epitaxy with metal organic vapour phase epitaxy. The laser diodes show threshold currents of approximately 60 mA at 25 degrees C, and high characteristic temperatures...
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