Direct observation of the near-surface layer in Pb(Mg1/3Nb2/3)O-3 using neutron diffraction

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Date
2004-11-19
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract

Spatially resolved neutron diffraction as a function of crystal depth in Pb(Mg1/3Nb2/3)O-3 reveals the presence of a distinct near-surface region where a strong distortion in the lattice exists. A dramatic change in both the lattice constant and the Bragg peak intensity as a function of crystal depth is observed to occur in this region over a length scale similar to100 mum. This confirms a previous assertion, based on a comparison between high-energy x rays and neutrons, that such a near surface region exists in the relaxors. Consequences to both single crystal and powder diffraction measurements and previous bulk neutron diffraction measurements on large single crystals are discussed.

Description
Keywords
2nd length scale, Single crystals, Scattering, Phase, Terbium, Physics
Citation
Conlon, KH ; Luo, H ; Viehland, D ; et al., Nov 2004. "Direct observation of the near-surface layer in Pb(Mg1/3Nb2/3)O-3 using neutron diffraction," PHYSICAL REVIEW B 70(17): 172204 DOI: 10.1103/PhysRevB.70.172204