Dj. Taylor et al., EFFECTS OF DISTURBING PULSES ON THE SWITCHABLE POLARIZATION OF PB(ZRTI)O3 THIN-FILM CAPACITORS, Applied physics letters, 64(11), 1994, pp. 1392-1394
The effect of disturbing pulses on the switchable polarization in ferr
oelectric films of PbZrxTi1-xO3 with x = 0.36 and 0.71 has been invest
igated. The two compositions were selected because of their different
hysteresis shapes. Pulse measurements were carried out with a varying
number of disturbing pulses at different amplitudes, interrupted by si
ngle shot read/write pulses. It was found that the composition with th
e squarer loop (x=0.36) showed less sensitivity to disturbing pulses,
i.e., the switchable polarization did not significantly degrade with 1
09 disturbing pulses of amplitude 1.2 V. In addition, these results de
monstrate that degradation of the stored polarization due to parasitic
disturbing voltages in high density ferroelectric random access memor
ies can be kept at an acceptable level.