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首页> 外文期刊>Physica, B. Condensed Matter >Neutron diffraction study of domain structures in poled and unpoled PZN-4.5%PT
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Neutron diffraction study of domain structures in poled and unpoled PZN-4.5%PT

机译：极化和非极化PZN-4.5％PT中畴结构的中子衍射研究

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Neutron diffraction was used to investigate the evolution of the domain structure in PZN-4.5%PT during cooling in zero field and in a (001) poling field. The use of neutron diffraction allows penetration below the thick skin layer that has presented significant problems for earlier X-ray studies. We have confirmed the existence of a tetragonal phase existing between the cubic and rhombohedral phases, and that a poling field of 500 V/cm along (001) is sufficient for a cubic to tetragonal phase transition to occur. In the absence of a poling field we find that a "Phase X" behaviour occurs on cooling from the cubic phase. However, once the cubic to tetragonal phase transition has occurred the poling field can be removed and the phase transition to the rhombohedral phase will occur on further cooling. As expected, the domain structure of the tetragonal phase contains 90 degrees twins and the dominant domain orientation is with the spontaneous polarization along the (001) poling field. (c) 2006 Elsevier B.V. All rights reserved.
机译：中子衍射被用来研究在零场和（001）极化场中冷却期间PZN-4.5％PT中畴结构的演变。中子衍射的使用允许渗透进入较厚的表皮层，这为早期的X射线研究提出了重大问题。我们已经证实在立方相和菱面体相之间存在四方相，并且沿（001）方向500 V / cm的极化场足以发生立方向四方相的转变。在没有极化场的情况下，我们发现从立方相冷却时会发生“ X相”行为。但是，一旦发生了立方到四方的相变，极化场就可以消除，并且在进一步冷却时会发生向菱面体相的相变。如预期的那样，四方相的畴结构包含90度孪晶，并且主要的畴取向是沿着（001）极化场的自发极化。 （c）2006 Elsevier B.V.保留所有权利。

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