High pressure structure of Tb2Ti2O7 pyrochlore at cryogenic temperatures

Ravhi S. Kumar; Andrew L. Cornelius; Maddury Somayazulu; Daniel Errandonea; Malcolm F. Nicol; Jason Gardner

doi:10.1002/pssb.200672558

High pressure structure of Tb₂Ti₂O₇ pyrochlore at cryogenic temperatures

Ravhi S. Kumar, Andrew L. Cornelius, Maddury Somayazulu, Daniel Errandonea, Malcolm F. Nicol, Jason Gardner

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11 Scopus citations

Abstract

The structure of Tb₂Ti₂O₇ pyrochlore was investigated at high pressures up to 24 GPa at cryogenic temperatures down to 6.5 K using angular dispersive X-ray diffraction with synchrotron radiation at HPCAT, Advanced Photon Source. The cell parameters were obtained by performing full profile Rietveld refinements of the diffraction data. The equation of state is obtained at low temperatures by fitting the pressure-volume data to a second order Birch Murnaghan eqation and a bulk modulus value of 168(4) GPa is obtained. The results show persistance of the pyrochlore structure up to the maximum pressure studied in the experiment and further indicate that pressure induces solely magnetic ordering which do not involve crystal symmetry changes.

Original language	English
Pages (from-to)	266-269
Number of pages	4
Journal	Physica Status Solidi (B) Basic Research
Volume	244
Issue number	1
DOIs	https://doi.org/10.1002/pssb.200672558
State	Published - Jan 2007
Externally published	Yes

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abstract = "The structure of Tb2Ti2O7 pyrochlore was investigated at high pressures up to 24 GPa at cryogenic temperatures down to 6.5 K using angular dispersive X-ray diffraction with synchrotron radiation at HPCAT, Advanced Photon Source. The cell parameters were obtained by performing full profile Rietveld refinements of the diffraction data. The equation of state is obtained at low temperatures by fitting the pressure-volume data to a second order Birch Murnaghan eqation and a bulk modulus value of 168(4) GPa is obtained. The results show persistance of the pyrochlore structure up to the maximum pressure studied in the experiment and further indicate that pressure induces solely magnetic ordering which do not involve crystal symmetry changes.",

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AU - Kumar, Ravhi S.

AU - Cornelius, Andrew L.

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AU - Errandonea, Daniel

AU - Nicol, Malcolm F.

AU - Gardner, Jason

PY - 2007/1

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AB - The structure of Tb2Ti2O7 pyrochlore was investigated at high pressures up to 24 GPa at cryogenic temperatures down to 6.5 K using angular dispersive X-ray diffraction with synchrotron radiation at HPCAT, Advanced Photon Source. The cell parameters were obtained by performing full profile Rietveld refinements of the diffraction data. The equation of state is obtained at low temperatures by fitting the pressure-volume data to a second order Birch Murnaghan eqation and a bulk modulus value of 168(4) GPa is obtained. The results show persistance of the pyrochlore structure up to the maximum pressure studied in the experiment and further indicate that pressure induces solely magnetic ordering which do not involve crystal symmetry changes.

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High pressure structure of Tb₂Ti₂O₇ pyrochlore at cryogenic temperatures

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