MICROWAVE LOSSES IN STRONTIUM TITANATE ABOVE THE PHASE TRANSITION

Journal Article · Thu Mar 15 04:00:00 EST 1962 · Physical Review (U.S.) Superseded in part by Phys.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.125.1915· OSTI ID:4783253

Rupprecht, G; Bell, R O

The microwave losses in both pure and doped SrTiO/sub 3/ were investigated as a function of frequency and temperature. The loss tangent is proportional to frequency in the range 3 to 36 kMc/sec. Above the phase transition at 112 deg Kthe temperature dependence of the loss tangent is well represented by tan delta = (T - T/sub c/ beta T + gamma T/), where the Curie temperature, Tc = 37 deg K. The parameter alpha is shown to be determined by lattice imperfections and vanishes for pure single-crystalline material. The parameters beta and gamma , which are related to third- and fourth-order anharmonic terms in the interionic potential, are shown to be intrinsic properties of the perfect lattice and are unaffected by imperfections. (auth)

• Research Organization: Raytheon Co., Waltham, Mass.
• NSA Number: NSA-16-015324
• OSTI ID: 4783253
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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
ELECTRIC POTENTIAL
FERROELECTRIC MATERIALS
FERROMAGNETIC MATERIALS
FREQUENCY
IMPURITIES
IONS
LATTICES
MICROWAVES
MONOCRYSTALS
PHASE DIAGRAMS
PHYSICS
STRONTIUM COMPOUNDS
TEMPERATURE
TITANIUM OXIDES