Publications by authors named "J L Macmanus-Driscoll"
This prospective and performance summary provides a view on the state of the art of emerging non-volatile memory (eNVM) in the semiconductor industry. The overarching aim is to inform academic researchers of the status of these technologies in industry, so as to help direct the right academic research questions for future materials and device development. eNVM already have a strong foothold in the semiconductor industry with the main target of replacing embedded flash memory, and soon possibly DRAM and SRAM, i.
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- - The study focuses on vertically aligned nanocomposite (VAN) thin films as a promising solution for enhancing solid oxide fuel cell (SOFC) cathodes, integrating conventional materials like LSCF and LSM with highly ionic conducting materials such as YSZ or doped CeO.
- - The research highlights the development of a new type of VAN cathode featuring La-doped BiO (LDBO) columns embedded in an LSM matrix, expected to significantly improve performance due to the high ionic conductivity of BiO-based materials.
- - Results indicate that the new BiO-based VAN cathodes demonstrate substantially lower area specific resistance (ASR) than planar LSM, marking a three orders of magnitude improvement, thus
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- Piezoresponse force microscopy (PFM) is a powerful technique for studying ferroelectric materials at a nanoscale but can produce misleading signals due to electrostatic interactions.
- The study introduces a calibration process and a method to identify the parasitic phase offset, enhancing the accuracy of the phase-amplitude loops.
- The techniques combine switching spectroscopy-PFM (SS-PFM) and Kelvin probe force microscopy (KPFM) to quantify local imprint voltages in various materials, revealing the significance of correct read voltage selection and allowing detailed mapping of imprint voltage variations in BaTiO single crystals.
The discovery of ferroelectricity in nanoscale hafnia-based oxide films has spurred interest in understanding their emergent properties. Investigation focuses on the size-dependent polarization behavior, which is sensitive to content and movement of oxygen vacancies. Though polarization switching and electrochemical reactions is shown to co-occur, their relationship remains unclear.
View Article and Find Full Text PDFA double layer 2-terminal device is employed to show Na-controlled interfacial resistive switching and neuromorphic behavior. The bilayer is based on interfacing biocompatible NaNbO and NbO, which allows the reversible uptake of Na in the NbO layer. We demonstrate voltage-controlled interfacial barrier tuning via Na transfer, enabling conductivity modulation and spike-amplitude- and spike-timing-dependent plasticity.
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