发明名称 |
METHODS OF DRIVING POLARIZATION INVERSION IN FERROELECTRIC MATERIALS AND DEVICES |
摘要 |
Methods and devices are described for driving ferroelectric perovskite oxide crystals to achieve polarization inversion with reduced coercivity. In some embodiments, the anisotropy in the potential energy surface of a ferroelectric material is employed to drive polarization inversion and switching with a reduced coercive field relative to uniaxial excitation. In some embodiments, polarization inversion with reduced coercivity is produced via the application of an electric field that exhibits a time-dependent orientation, in contrast with conventional uniaxial electrical excitation, thereby causing the central ion (and the crystal structure as a whole) to evolve along a lower-energy path, in which the central ion is driven such that it avoids the potential energy maximum. This may be achieved, for example, by applying at least two non-parallel time-dependent voltages (e.g. bias, potential) such that orientation of the electric field changes with time during the switching cycle. |
申请公布号 |
CA2930206(A1) |
申请公布日期 |
2015.05.28 |
申请号 |
CA20142930206 |
申请日期 |
2014.11.21 |
申请人 |
THUNDER BAY REGIONAL RESEARCH INSTITUTE |
发明人 |
RUBEL, OLEG;PICHARDO, SAMUEL;CURIEL, LAURA;AHMED, SHEIKH JAMIL;COLE, JEREMY |
分类号 |
G10K9/122;A61B8/00;A61N7/00;B08B3/12 |
主分类号 |
G10K9/122 |
代理机构 |
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