Thin films of Li-doped ZnO of different compositions (Zn1-xLix)O, x=0.1, 0.
17, and 0.3 have been prepared on Si(100) substrates, with no buffer layer,
by the pulsed laser deposition method. Ferroelectric behavior with a memor
y window of 1.2 V has been observed in capacitance-voltage measurements. Th
e peak maximum in the capacitance-temperature curve suggests that the ferro
electric phase transition occurs around 340 K. (C) 1999 American Institute
of Physics. [S0003-6951(99)01617-4].