6533b870fe1ef96bd12cfada
RESEARCH PRODUCT
High pressure structure of Tb2Ti2O7 pyrochlore at cryogenic temperatures
Andrew CorneliusRavhi S. KumarMaddury SomayazuluJason S. GardnerJason S. GardnerDaniel ErrandoneaMalcolm Nicolsubject
DiffractionEquation of stateBulk modulusChemistryPyrochloreSynchrotron radiationThermodynamicsAdvanced Photon SourceCrystal structureengineering.materialCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsCrystallographyHigh pressureengineeringdescription
The structure of Th 2 Ti 2 O 7 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-01 | physica status solidi (b) |