UNUSUAL ELECTRIC-FIELD EFFECTS IN ND0.7SR0.3MNO3

Enhanced electric field (E) induced modulation of the resistance of ep itaxial thin films of Nd0.7Sr0.3MnO3 has been observed. The results sh ow several remarkable features: first, field-direction-independent dec rease of the resistance above the temperature at which the peak in res istivity occurs (T-p); second, proportionality of the modulation to E( 2); third, a reduction in the magnitude and field-direction-independen t reversal of the sign of Delta R/R just below T-p; and fourth, a prom pt time response at high temperatures and a slower response near T-p. These results are consistent with a model of a polarization-induced la ttice distortion coupling with both spin and charge transport.