论文标题
铁弹性纳米域的单个Barkhausen脉冲
Individual Barkhausen pulses of ferroelastic nanodomains
论文作者
论文摘要
铁电材料在电场偏置时显示出极化不连续性，即Barkhausen跳跃，这是一种更普遍的现象的子类，称为Crackling噪声。本文中，我们在纳米级遵循透射电子显微镜内部施加的电场诱导的90度针头域的运动。 Barkhausen脉冲的运动性质和周期性的性质可实时可视化彼此区域的独特相互作用机制，但没有接触，这种机制尚未观察到，或/和/和/和/and伴随着域壁似乎相对自由地通过介电介质而移动的晶格，具有较弱的Peierls类似的潜在。控制铁弹性结构域壁运动的动力学可以导致与计算和存储应用有关的新型纳米电子设备。
Ferroelectric materials, upon electric field biasing, display polarization discontinuities known as Barkhausen jumps, a subclass of a more general phenomenon known as crackling noise. Herein, we follow at the nanoscale the motion of 90 degree needle domains induced by an electric field applied in the polarization direction of the prototypical ferroelectric BaTiO3, inside a transmission electron microscope. The nature of motion and periodicity of Barkhausen pulses leads to real-time visualization of distinctive interaction mechanisms of the domains with each other but without coming into contact, a mechanism that has not been observed before, or/and with the lattice where the domain walls appear to be moving through the dielectric medium relatively freely, experiencing weak Peierls-like potentials. Control over the kinetics of ferroelastic domain wall motion can lead to novel nanoelectronic devices pertinent to computing and storage applications.
