Journal
SOLID STATE COMMUNICATIONS
Volume 151, Issue 20, Pages 1486-1489Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2011.06.033
Keywords
Relaxor ferroelectric; Local structure; Reverse Monte Carlo modeling; Neutron total scattering
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Funding
- National Research Foundation of Korea
- Korean government (MEST) [2010-00001198, KRF-2008-331-C00087]
- DOE Office of Basic Energy Sciences
- DOE [DE-AC52-06NA25396]
- NSF [DMR 00-76488]
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We performed neutron total scattering measurements on relaxor ferroelectric Ba(Ti0.3Zr0.3)O-3 from T = 350 to 50 K. Using reverse Monte Carlo modeling on the total scattering data in k-space as well as in real space, we show that the off-centering of Ti ion is the source of local polarization at all temperatures. In addition, we estimated that Ti displacement is toward the < 111 > direction with a magnitude of about similar to 0.11 angstrom. We also present an evolution of Ti-O bond length distribution across the maximum permittivity temperature, which suggests a freezing of local polarization with decreasing temperature. (C) 2011 Elsevier Ltd. All rights reserved.
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