Effect of hydrostatic pressure on the incommensurate phase of K/sub 2/SeO/sub 4/

Journal Article · Tue Jul 01 00:00:00 EDT 1980 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.22.332· OSTI ID:5310680

Press, W; Majkrzak, C F; Axe, J D; Hardy, J R; Massa, N E; Ullman, F G

A neutron scattering study of the effect of hydrostatic pressure on the incommensurate phase transformation in K/sub 2/SeO/sub 4/ was performed in order to obtain information concerning the nature of the competing forces that give rise to a structural instability at a general wave vector. It was found that an increase in pressure lowers the transition temperature (dT/sub i//dP/sub i/=-6.5 K/kbar) and results in a smaller value of the initial incommensurate wave vector. The pressure dependence of the incommensurate to ferroelectric phase transition was also investigated (dT/sub c//dP/sub c/ approx. = -9 K/kbar). The latter transition displays a distinct pressure hysteresis.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 5310680
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Vol. 22:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
POTASSIUM COMPOUNDS
CRYSTAL-PHASE TRANSFORMATIONS
FERROELECTRIC MATERIALS
NEUTRON DIFFRACTION
PRESSURE DEPENDENCE
SELENATES
TRANSITION TEMPERATURE
ALKALI METAL COMPOUNDS
COHERENT SCATTERING
DIELECTRIC MATERIALS
DIFFRACTION
MATERIALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SCATTERING
SELENIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
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