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[資源]
【Nature communication】順電體疇壁中的鐵電性---可做存儲材料
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Ferroelectric materials are heavily used in electro-mechanics and electronics. Inside the ferroelectric, domain walls separate regions in which the spontaneous polarization is differently oriented. Properties of ferroelectric domain walls can differ from those of the domains themselves, leading to new exploitable phenomena. Even more exciting is that a non-ferroelectric material may have domain boundaries that are ferroelectric. Many materials possess translational antiphase boundaries. Such boundaries could be interesting entities to carry information if they were ferroelectric. Here we show first that antiphase boundaries in antiferroelectrics may possess ferroelectricity. We then identify these boundaries in the classical antiferroelectric lead zirconate and evidence their polarity by electron microscopy using negative spherical-aberration imaging technique. Ab initio modelling confirms the polar bi-stable nature of the walls. Ferroelectric antiphase boundaries could make high-density non-volatile memory; in comparison with the magnetic domain wall memory, they do not require current for operation and are an order of magnitude thinner. 鐵電體中,疇壁將具有不同極化方向的疇隔離開來。具有與疇不同的性質(zhì)的疇壁是一個有待研究的區(qū)域。本文用電子顯微鏡和egative spherical-aberration成像技術(shù)發(fā)現(xiàn)并確定了非極性順電體中的antiphase boundaries的鐵電性。 Ferroelectric antiphase boundaries 可以用來開發(fā)做高能存儲器,與磁性疇壁存儲器相比,這類存儲器不需要操作電流,而且更薄 |
先進(jìn)材料 | 鐵電壓電 | 物理材料類 | 物理性能 |
鐵電多鐵+功能聚合物 | 文集 | BFO的一切 |
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