MICROWAVE ABSORPTION IN CUBIC STRONTIUM TITANATE

Journal Article · Thu Mar 15 04:00:00 EST 1962 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.125.1921· OSTI ID:4783252

Silverman, B D

An analysis of the temperature dependence of the microwave loss in SrTiO/ sub 3/ is presented using the linear chain model of a ferroelectric, It is shown that a plausible explanation of the temperature dependence of the microwave loss tangent above liquid air temperature is possible if the loss due to the damping of a virtual excitation in the wing of a fundamental lattice absorption is considered. The fundamental lattice absorption is associated with a lowfrequency ferroelectric'' transverse optical mode of the material. The microwave loss tangent can be expressed by tan delta = (T - T/aub c/)- (A + BT + DT/sub 2/). The parameter A is a measure of the damping due to the presence of imperfections in the lattice. The parameters B and D arise from damping due to three- and four- phonon processes whose origin is attributed to the anharmonic interactions of the lattice. (auth)

• Research Organization: Raytheon Co., Waltham, Mass.
• NSA Number: NSA-16-015325
• OSTI ID: 4783252
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 125; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
CRYSTALS
CURIE POINT
DEFECTS
EXCITATION
FERROELECTRIC MATERIALS
FERROMAGNETIC MATERIALS
FREQUENCY
INTERACTIONS
LATTICES
MICROWAVES
MOCKUP
PHONONS
PHYSICS
SOUND
STRONTIUM COMPOUNDS
TEMPERATURE
TITANIUM OXIDES