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arXiv · 1703.03662

Unipolar resistive switching in cobalt titanate thin films

Atul Thakre·A. K. Shukla·R. S. Katiyar·Ashok Kumar
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Abstract

We report giant resistive switching of an order of 104, long-time charge retention characteristics up to 104 s, non-overlapping SET and RESET voltages, ohmic in low resistance state (LRS) and space charge limited current (SCLC) mechanism in high resistance state (HRS) properties in polycrystalline perovskite Cobalt Titanate (CoTiO3 ~ CTO) thin films. Impedance spectroscopy study was carried out for both LRS and HRS states which illustrates that only bulk resistance changes after resistance switching, however, there is a small change (<10% which is in pF range) in the bulk capacitance value in both states. These results suggest that in LRS state current filaments break the capacitor in many small capacitors in a parallel configuration which in turn provides the same capacitance in both states even there was 90 degree changes in phase-angle and an order of change in the tangent loss.

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Atul Thakre, A. K. Shukla, R. S. Katiyar, Ashok Kumar. 2017-03-10. Unipolar resistive switching in cobalt titanate thin films. https://doi.org/10.1209/0295-5075%2F117%2F37003

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