Skip to main content

Symmetry and light stuffing of Ho2Ti2O7 , Er2Ti2O7 , and Yb2Ti2O7 characterized by synchrotron x-ray diffraction

Author(s): Baroudi, Kristen; Gaulin, Bruce D.; Lapidus, Saul H.; Gaudet, Jonathan; Cava, Robert Joseph

To refer to this page use:
Abstract: The Ho2Ti2O7, Er2Ti2O7, and Yb2Ti2O7 pyrochlores were studied by synchrotron x-ray diffraction to determine whether the (002) peak, forbidden in the pyrochlore space group Fd-3m but observed in single crystal neutron scattering measurements, is present due to a deviation of their pyrochlore structure from Fd-3m symmetry. Synchrotron diffraction measurements on precisely synthesized stoichiometric and nonstoichiometric powders and a crushed floating zone crystal of Ho2Ti2O7 revealed that the (002) reflection is absent in all cases to a sensitivity of approximately one part in 30000 of the strongest x-ray diffraction peak. This indicates to high sensitivity that the space group of the crystal structure of these rare earth titanate pyrochlores is Fd-3m, and that, thus, the (002) peak observed in the neutron scattering experiments has a nonstructural origin. The cell parameters and internal strain for lightly stuffed Ho2+xTi2-xO7 are also presented. © 2015 American Physical Society. ©2015 American Physical Society.
Publication Date: Jul-2015
Electronic Publication Date: 30-Jul-2015
Citation: Baroudi, Kristen, Gaulin, Bruce D., Lapidus, Saul H., Gaudet, Jonathan, Cava, R.J. (2015). Symmetry and light stuffing of , and characterized by synchrotron x-ray diffraction. Physical Review B, 92 (2), 10.1103/PhysRevB.92.024110
DOI: doi:10.1103/PhysRevB.92.024110
ISSN: 1098-0121
EISSN: 1550-235X
Pages: 92.2:024110-1 - 024110-7
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review B
Version: Final published version. This is an open access article.
Notes: Physical Review B - Condensed Matter and Materials Physics. Volume 92, Issue 2, 30 July 2015, Article number 024110.

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.