Author： Kaku Sigeru Miyauchi Satoshi Yamada Kazu Matsumoto Daisuke Watanabe Yukio
Publisher： Taylor & Francis Ltd
ISSN： 0015-0193
Source： Ferroelectrics, Vol.335, Iss.1, 2006-01, pp. : 159-167
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Abstract
We report the finding of two new effects in the current conduction through ferroelectric films: a temperature-induced abrupt conductance change and an effect similar to the positive-temperature-coefficient-of-resistance (PTCR). Here, we use mostly the lattice-mismatched epitaxial heterostructure BaTiO 3 /(La,Sr) 2 CuO 4 . The results should provide an insight into the insulator-metal transition in insulators and the new class of the thin-film PTCR.
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