@inproceedings{219d33a4ff3b4f569040ab5de929e919,
title = "Anomalous synchrotron x-ray scattering studies of nanodomains in Pb(Mg1/3Nb2/3)O3",
abstract = "A systematic study of the temperature dependence of superlattice reflections in the reciprocal space of a single crystal Pb(Mg1/3Nb22/3)O3 (PMN) was performed using anomalous x-ray scattering technique. Our studies confirm the existence of the two types of nanoregioris in PMN: a) chemically ordered nanodomains, and h) polar nanodomains formed by short-range correlated ionic displacements. No detailed temperature dependence of these superlattice reflections has been reported in the past. From monitoring the superlatttice reflections corresponding to polar nanodomains (i.e. QJ spots) over the temperature range 15K-800K, we found freezing temperature (Tf) of correlated atomic displacements was near 200 K. In contrast, chemically ordered nanodomains, which give rise to F type superlattice peaks, exhibited spherical shape over the entire temperature interval 15-800 K, This leads us to suspect that chemically ordered regions might be different and independent of polar nanodomains. In this paper we explain the contributions of different atomic displacements to a and F superlattice reflections in PMN. Correlation and competition between Pb displacements and the tilting of oxygen octahedra network are presented to understand the microstructural origin of the relaxor ferroelectric behavior.",
author = "A. Tkachuk and Haydn Chen and P. Zschack and E. Colla",
note = "The research was supported by the US Department of Energy: grant No. DEFG02-96ER45439 through the Frederick Seitz Materials Research Laboratory. We thank the staff of UNICAT at the Advanced Photon Source, Argonne National Laboratory and MATRIX at NSLS, Brookhaven National Laboratory. We also would like to thank Dr. Zhongming Wu for his assistance during the experiments conducted at UNICAT. The UNICAT facility at the Advanced Photon Source (APS) is supported by the University of Illinois at Urbana-Champaign, Materials Research Laboratory (U.S. Department of Energy, the State of Illinois-IBHE-HECA and the National Science Foundation), the Oak Ridge National Laboratory (U.S. Department of Energy under contract with Lockheed Martin Energy Research), the National Institute of Standards and Technology (U.S. Department of Commerce) and UOP LLC. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Basic Energy Sciences, Office of Science, under Contract No. W-31-109-Eng-38.' The research was supported by the US Department of Energy: grant No. DEFG02-96ER45439 through the Frederick Seitz Materials Research Laboratory. We thank the staff of UNICAT at the Advanced Photon Source, Argonne Na- tional Laboratory and MATRIX at NSLS, Brookhaven National Laboratory. We also would like to thank Dr. Zhongming Wu for his assistance during the experi-ments conducted at UNICAT. The UNICAT facility at the Advanced Photon Source (APS) is supported by the University of Illinois at Urbana-Champaign, Materials Research Laboratory (U.S. Department of Energy, the State of Illinois-IBHE-HECA and the National Science Foundation), the Oak Ridge National Laboratory (U.S. Department of Energy under contract with Lockheed Martin Energy Research), the National Institute of Standards and Technology (U.S. Department of Commerce) and UOP LLC. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Basic Energy Sciences, Office of Science, under Contract No. W-31-109-Eng-38.'; Aspen Center for Physics Winter Workshop on Fundamental Physics of Ferroelectrics 2000 ; Conference date: 13-02-2000 Through 20-02-2000",
year = "2000",
month = sep,
day = "12",
doi = "10.1063/1.1324449",
language = "English (US)",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
pages = "136--142",
editor = "Cohen, {Ronald E.} and Mewaldt, {Richard A.}",
booktitle = "Fundamental Physics of Ferroelectrics 2000",
}