Neutron scattering study of the pressure-induced phase transformation in ReO/sub 3/

Journal Article · Tue Jan 15 00:00:00 EST 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.31.663· OSTI ID:6222401

Axe, J D; Fujii, Y; Batlogg, B; Greenblatt, M; Di Gregorio, S

We have studied the pressure-induced phase transformation in a large single crystal of ReO/sub 3/ at 300 K and (0--6)-kbar hydrostatic pressure. Inelastic measurements at 1 bar show a pronounced minimum in the T/sub 1/ mode near the Brillouin-zone boundary (M point). Above P/sub c/ = 5.2 kbar superlattice reflections with intensities consistent with M/sub 3/-like rotations of ReO/sub 6/ octahedra appear. The transformation seems to be continuous (second order), but an anomaly in the superlattice intensity at P = 5.4 kbar suggests a further transformation. The M/sub 3/ phonon softens dramatically as P..-->..P/sub c/ from below, but no substantial changes occur in the long-wavelength acoustic velocities between 0 and 6 kbar.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 6222401
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 31:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
RHENIUM OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
NEUTRON DIFFRACTION
EXPERIMENTAL DATA
HIGH PRESSURE
INELASTIC SCATTERING
MEDIUM PRESSURE
MEDIUM TEMPERATURE
MONOCRYSTALS
PHONONS
PRESSURE DEPENDENCE
SUPERLATTICES
VERY HIGH PRESSURE
CHALCOGENIDES
COHERENT SCATTERING
CRYSTALS
DATA
DIFFRACTION
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
QUASI PARTICLES
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties