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  • 1
    Electronic Resource
    Electronic Resource
    Charge dynamics in silicon nitride/silicon oxide double layers (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 2757-2759 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Transport of positive charge deposited by a corona discharge on the open nitride surface of a silicon nitride (150 nm)/silicon oxide (300 nm) double layer on silicon substrate is studied by determining the location of the charge centroid with a capacitance–voltage method used in conjunction with surface-potential measurements. At temperatures of about 400 °C, the charge is mobile in the nitride and a large part of it is eventually trapped at the nitride/oxide interface while some of the charge reaches the substrate through the oxide. Indications are that at this temperature the mean free path of positive charges in the nitride and oxide layers is comparable to the layer thicknesses, but much shorter in the nitride at lower temperatures. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1369387
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    Coexistence of multiple positive and negative electrocaloric responses in (Pb, La)(Zr, Sn, Ti)O3 single crystal (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-02-25
    Description: The electrocaloric effect has been investigated in antiferroelectric (Pb, La)(Zr, Sn, Ti)O 3 (PLZST) single crystals grown by the flux method. The measurements of polarization versus electric field loops on unpoled crystals revealed that at room temperature, a critical electric field of 1.8 kV/mm is needed to induce a ferroelectric phase from an antiferroelectric phase. The dielectric properties demonstrated that the induced ferroelectric phase recovers to antiferroelectric phase when temperature is above the depolarization temperature (70 °C–100 °C). Coexistence of the negative and positive electrocaloric effect has been achieved in ⟨001⟩-oriented PLZST single crystals. Multiple electrocaloric response values of −0.054 °C at room temperature, 0.17 °C near the depolarization temperature, −0.14 °C at 125 °C, and 0.75 °C around Curie temperature have been observed under an electric field of 3 kV/mm. The coexistence of multiple negative and positive electrocaloric effects in one material provides a possibility to design solid-state refrigerator technologies to enhance the electrocaloric efficiency.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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