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4-state anti-ferroelectric random access memory

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Ferroelectric random access memory (FRAM) is a 2-state non-volatile memory, in which information is digitally encoded using switchable remanent polarization states within a ferroelectric thin film capacitor. Here we propose a novel nonvolatile memory based on anti-ferroelectric polycrystalline ceramics, termed anti-ferroelectric random access memory (AFRAM). The AFRAM memory cell architecture is similar to FRAM, but it requires a more complex operation protocol. Our initial experimental demonstration of the memory effect in antiferroelectric ceramic shows, remarkably, that the AFRAM technology encodes data in both ferroelectric sublattices of the anti-ferroelectric medium. This results in a 4-state non-volatile memory capable of storing 2 digital bits simultaneously, unlike the FRAM technology that has 2-memory states and it is capable to store 1 digital bit per cell.
Original languageEnglish
Pages (from-to)1551-1554
Number of pages4
Journal IEEE Electron Device Letters
Volume37
Issue number12
DOIs
Publication statusPublished - 3 Oct 2016

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  • EDL_2016_07_1218_R1

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DOI: https://doi.org/10.1109/LED.2016.2614841

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