Device having two perovskite crystalline layers that shows hysteresis and piezoelectric behavior
AssigneeAgency of Industrial Science and Technology
InventorsChaonan Xu, Tadahiko Watanabe, Yun Liu, Morito Akiyama
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Abstract
Disclosed is an electronic device having a multilayered structure consisting of (a) a substrate, (b) an electroconductive layer of lanthanum nickel oxide LaNiO3 having a perovskite structure formed on the substrate surface and (c) a dielectric layer of PZT having an oriented perovskite structure formed on the electroconductive layer. The device exhibits excellent piezoelectric effect under mechanical stress and stable hysteresis phenomenon of electric polarization under application of electric fields so that the device is useful as a stress sensor and as a memory device. A method for the preparation of the multilayered device is disclosed.
Claims8
A multilayered electronic device which comprises:
- (a) a substrate which is formed from a ceramic material or a glassy material;
- (b) a layer of an electroconductive polycrystalline material having a perovskite structure formed on the surface of the substrate;
- and
- (c) a layer of a dielectric crystalline material having an oriented perovskite structure formed on the electrocoductive layer (b).
Dependencies are inferred from the claim text.