Unusual Electric Field Effects In Nd0.7sr0.3mno3
PHYSICAL REVIEW LETTERS(1996)
摘要
Enhanced electric field (E) induced modulation of the resistance of epitaxial thin films of Nd0.7Sr0.3MnO3 has been observed. The results show several remarkable features: first, field-direction-independent decrease of the resistance above the temperature at which the peak in resistivity occurs (T-p); second, proportionality of the modulation to E(2); third, a reduction in the magnitude and field-direction-independent reversal of the sign of Delta R/R just below T-p; and fourth, a prompt time response at high temperatures and a slower response near T-p. These results are consistent with a model of a polarization-induced lattice distortion coupling with both spin and charge transport.
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