Far infrared and microwave conductivity spectrum of semiconducting Tl2Se·As2Te3 glass

Bishop, S. G.; Taylor, P. C.; Mitchell, D. L.; Slack, L. H.

doi:10.1016/0022-3093(71)90073-1

Cited by 18 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In similar glasses phonon modes as low as 5 GHz were observed 32 . These modes might prevent full equilibration of the supercooled liquid.…”

Section: Figmentioning

confidence: 82%

“…This might be a consequence of the time scales at elevated temperature of about 19 ps not being sufficiently longer than the time scales associated with all possible atomic dynamics. In similar glasses, phonon modes as low as 5 GHz were observed . These modes might prevent full equilibration of the supercooled liquid.…”

mentioning

confidence: 95%

“…In similar glasses, phonon modes as low as 5 GHz were observed. 32 These modes might prevent full equilibration of the supercooled liquid. The different behaviors of both glasses are yet another fingerprint of the high fragility of this material.…”

mentioning

confidence: 99%

See 2 more Smart Citations

How Supercooled Liquid Phase-Change Materials Crystallize: Snapshots after Femtosecond Optical Excitation

et al. 2015

View full text Add to dashboard Cite

Glass forming materials are employed in information storage technologies making use of the transition between a disordered (amorphous) and an ordered (crystalline) state. With increasing temperature the crystal growth velocity of these phase-change materials becomes so fast that prior studies have not been able to resolve these crystallization dynamics. However, crystallization is the time limiting factor in the write speed of phase-change memory devices. Here, for the first time, we quantify crystal growth velocities up to the melting point by using the relaxation of photo-excited carriers as an ultrafast heating mechanism.During repetitive femtosecond optical excitation, each pulse enables dynamical evolution for tens of picoseconds before the intermediate atomic structure is frozen-in as the sample rapidly cools. We apply this technique to Ag 4 In 3 Sb 67 Te 26 (AIST) and compare the dynamics of as-deposited and application-relevant melt-quenched glass. Both glasses retain their different kinetics even in the supercooled liquid state, thereby revealing differences in their kinetic fragilities. This approach enables the characterization of application-relevant properties of phase-change materials up to the melting temperature, which has not been possible before.Mankind has utilized glasses during the last five thousand years. They can be prepared by cooling a liquid fast and far enough below the glass transition temperature -to a temperature where its viscosity is sufficiently high that the atomic arrangement is kinetically frozen-in 1 . Until recently, research and technology have focused on good glass formers, i.e. materials which can be vitrified by cooling their liquid state at moderate rates. But in recent decades poor glass formers such as metallic glasses and certain chalcogenide glasses have gained interest due to their remarkable property portfolio 2,3 . These materials need to be cooled at rates in excess of around 3*10 9 K/s to bypass crystallization and to quench the atoms in an amorphous arrangement 4 . This so-called glass transition at temperature is commonly observed at a

show abstract

“…In similar glasses phonon modes as low as 5 GHz were observed 32 . These modes might prevent full equilibration of the supercooled liquid.…”

Section: Figmentioning

confidence: 82%

mentioning

confidence: 95%

See 1 more Smart Citation

How Supercooled Liquid Phase-Change Materials Crystallize: Snapshots after Femtosecond Optical Excitation

et al. 2015

View full text Add to dashboard Cite

show abstract

“…1(a)) is different from the edge of an ideal amorphous semiconductor because of increasing of the absorption coefficient with decreasing energy. This behavior can be explained by the free carrier absorption, which is reported for polycrystalline Cd 3 As 2 thin films [18,19], other narrow-gap semiconductors [20] and other amorphous materials, like halcogenide glasses [21,22]. The free carrier absorption in a-Cd 3 As 2 films is higher for slower evaporated films ( Fig.…”

Section: Optical Absorptionmentioning

confidence: 83%

Distribution of electronic states in amorphous Cd–As thin films on the basis of optical measurements

Jarząbek

Weszka

Cisowski

2004

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…The thermal conductivity and specific heat of As^^Teg^Ge^Q was determined by Thomas and Savage (1977). Bishop, et al (1971) measured the far infrared and microwave con ductivity of TlgSe-ASgTCg and semiconducting glass by the use of the short-11 circuit method (1 to 6 GHz) and interferometric spectroscopy (3 x10to…”

Section: Relative Permittivity Measurementsmentioning

confidence: 99%

The microwave dielectric properties of chalcogenide glasses

Davies

View full text Add to dashboard Cite

The microwave dielectric properties of the chalcogenide glass ASggTeggGe^g (by atomic percent) were determined, utilizing the trans mission method. The relative permittivity was found to be 15.9 + 0.9 for the 8.0 to 12.4 GHz frequency band. The loss tangent was found to be less than or equal to 0.3 throughout the same frequency band. The error in the relative permittivity measurements was determined to be less than 5%. Samples were prepared from 99.99%.pure arsenic, tellurium, and germa nium. Quartz ampules containing the As^gTe^^Ge^Q were heated to 1000 degrees centigrade for 24 hours and then quenched in liquid nitrogensoaked sand. Test samples were produced by placing the quenched ASg^Teg^Ge^Q in chrome-plated molds, reheating to 600 degrees centigrade, and requenching, using dry ice. The transmission method yielded excellent results for low, medium, or high relative permittivity samples, regardless of sample thickness. The method is based on the comparison of the dominant Transverse Electric fields in a rectangular waveguide with and without a sample being present. The resulting transcendental equation with two unknowns was solved by generating tables based on the substitution of various values of complex relative permittivity, and comparing the corresponding phase shift and amplitude change with the measured values. A unique solution was found by comparing results of samples of different thicknesses.

show abstract

Far infrared and microwave conductivity spectrum of semiconducting Tl2Se·As2Te3 glass

Cited by 18 publications

References 6 publications

How Supercooled Liquid Phase-Change Materials Crystallize: Snapshots after Femtosecond Optical Excitation

How Supercooled Liquid Phase-Change Materials Crystallize: Snapshots after Femtosecond Optical Excitation

Distribution of electronic states in amorphous Cd–As thin films on the basis of optical measurements

The microwave dielectric properties of chalcogenide glasses

Contact Info

Product

Resources

About