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    Ferroelectrics everywhere? New family of ferroelectric materials Raises Possibilities for Improved Information and Energy Storage

    September 1, 2021, Categories  Physics, Technology/Electronics

    Three images showing production of ferroelectric magnesium-substituted zinc oxide thin films
    Part of the process of creating ferroelectric magnesium-substituted zinc oxide thin films include: (left) Image showing thin film being sputter-deposited from metal sources; (center) ferroelectric hysteresis loops of thin-film capacitors showing two remanent polarization states at zero field; (right) atomic force microscope image showing a smooth surface at the nanometer scale and a very fine-grained and fiber-textured microstructure.
     IMAGE: PENN STATE MATERIALS RESEARCH INSTITUTE

    A new family of materials that could result in improved digital information storage and uses less energy may be possible thanks to a team of Penn State researchers who demonstrated ferroelectricity in magnesium-substituted zinc oxide.

    Ferroelectric materials are spontaneous electricly polarized bcause nega...

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    For UW physicists, the 2D form of Tungsten Ditelluride is full of surprises

    August 12, 2018, Categories  Chemistry/Nanotechnology, Physics, Technology/Electronics

    When two monolayers of WTe2 are stacked into a bilayer, a spontaneous electrical polarization appears, one layer becoming positively charged and the other negatively charged. This polarization can be flipped by applying an electric field. Credit: Joshua Kahn

    When two monolayers of WTe2 are stacked into a bilayer, a spontaneous electrical polarization appears, one layer becoming positively charged and the other negatively charged. This polarization can be flipped by applying an electric field.
    Credit: Joshua Kahn

    Researchers report that the 2D form of tungsten ditelluride can undergo ‘ferroelectric switching.’ Materials with ferroelectric properties can have applications in memory storage, capacitors, RFID card technologies and even medical sensors – and tungsten ditelluride is the first exfoliated 2D material known to undergo ferroelectric switching.

    2D materials can be prepared in crystalline sheets as thin as a single monolayer, only one or a few atoms thick...

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