Now showing items 11-20 of 543
Investigation And Application Of The Frustrated-Total-Internal-Reflection Phenomenon in Optical Fibers
(Optical Society of America, 1997-12-01)
A detailed investigation of the frustrated-total-internal-reflection (FTIR) phenomenon in silica-glass-based optical fibers and its application to simple intensity-modulated strain and pressure sensors is presented. Such ...
Fabry-Perot Fiber-Optic Sensors in Full-Scale Fatigue Testing on an F-15 Aircraft
(Optical Society of America, 1992-02-01)
We report results from fiber-optic-sensor field tests on an F-15 aircraft mounted within a full-scale test frame for the purpose of fatigue testing. Strain sensitivities of the order of 0.01 _m/m have been obtained.
Novel Method For Determining The Curie-Temperature Of Ferroelectric-Films
(AIP Publishing, 1993-09-01)
A novel technique to measure the Curie temperature of ferroelectric thin films has been developed. The method is based on identifying changes in slope of film stress versus temperature plot. At the Curie temperature, ...
Properties of Ba(Mg1/3Ta2/3)O-3 thin films prepared by metalorganic solution deposition technique for microwave applications
(AIP Publishing, 1998-08-01)
We report on the properties of Ba(Mg1/3Ta2/3)O-3 thin films prepared by the metalorganic solution deposition technique. Bulk Ba(Mg1/3Ta2/3)O-3 ceramics have shown excellent dielectric properties at microwave frequencies; ...
Structural and electrical properties of crystalline (1-x)Ta2O5-xAl(2)O(3) thin films fabricated by metalorganic solution deposition technique
(AIP Publishing, 1997-09-01)
Polycrystalline (1-x)Ta2O5-xAl(2)O(3) thin films were fabricated by metalorganic solution deposition technique on Pt-coated Si substrate at a temperature of 750 degrees C. Thin films with 0.9Ta(2)O(5)-0.1Al(2)O(3) composition ...
Highly c-axis oriented Pb(Zr,Ti)O-3 thin films grown on Ir electrode barrier and their electrical properties
(AIP Publishing, 1999-03-01)
We have investigated the structural and electrical properties of sol-gel derived Pb(Zr, Ti)O-3 (PZT) thin films deposited on Ir electrode barrier (Ir/poly-Si/SiO2/Si). Owing to the interface-controlled growth, highly c-axis ...
Measuring Microwave Shielding Effectiveness in Liquid-Nitrogen
(AIP Publishing, 1994-04-01)
A technique to distinguish between materials that can and cannot shield microwaves in liquid nitrogen was developed. The samples are placed in a modified X-band waveguide, which operates by the same ''insertion loss'' ...
Poly(tetrafluoro-p-xylylene), a low dielectric constant chemical vapor polymerized polymer
(AIP Publishing, 1998-01-01)
A low dielectric constant polymer, poly(tetrafluoro-p-xylylene) (VT-4) was synthesized by a chemical vapor polymerization process using 4,5,7,8,12,13,15,16-octafluoro-[2.2]-paracyclophane as a precursor. The VT-4 polymer ...
Characterization and elimination of dry etching damaged layer in Pt/Pb(Zr0.53Ti0.47)O-3/Pt ferroelectric capacitor
(AIP Publishing, 1999-07-01)
The damage of Pb(Zr0.53Ti0.47)O-3 thin film due to dry etching process was characterized in terms of the microstructure and electrical properties. The damaged layer seems to be amorphous and the thickness of the damaged ...
Study of mechanical alloying of Sm and Fe
(American Institute of Physics, 1997-04-15)
Mechanical alloying of Sm and Fe with the composition of SmFe3 was studied using x-ray-diffraction (XRD), Mossbauer, and magnetization measurements. Data taken as a function of milling time for up to 20 h show significant ...