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High-pressure synchrotron X-ray diffraction study of the pyrochlores: Ho2Ti2O7, Y2Ti2O7 and Tb2Ti2O7

Scott, Paul R and Midgley, A and Musaev, O and Muthu, DVS and Singh, SK and Suryanarayanan, R and Revcolevschi, A and Sood, AK and Kruger, MB (2011) High-pressure synchrotron X-ray diffraction study of the pyrochlores: Ho2Ti2O7, Y2Ti2O7 and Tb2Ti2O7. In: International Journal of High Pressure Research, 31 (1). pp. 219-227.

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Official URL: http://www.informaworld.com/smpp/content~db=all?co...

Abstract

Synchrotron-based X-ray diffraction was used to study the phase diagrams and determine the compressibilities of the pyrochlore rare-earth titanates Ho2Ti2O7, Y2Ti2O7 and Tb2Ti2O7 to 50GPa. The bulk moduli of the cubic phase of these materials were calculated to be 213 +/- 2, 204 +/- 3 and 199 +/- 1GPa, respectively. The onset of a structural phase change from cubic to monoclinic was observed near 37, 42 and 39GPa, respectively. The bulk modulus for the high pressure monoclinic phase of Y2Ti2O7 has been determined to be 185 +/- 3GPa.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Keywords: high pressure;XRD;synchrotron;pyrochlore;spin ice;Tb2Ti2O7; Y2Ti2O7;Ho2Ti2O7
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 19 Apr 2011 07:22
Last Modified: 19 Apr 2011 07:22
URI: http://eprints.iisc.ernet.in/id/eprint/36963

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