Temperature dependence of Akhieser loss in indium antimonide

1979 ◽  
Vol 50 (6) ◽  
pp. 4065-4066 ◽  
Author(s):  
Manik Nandanpawar ◽  
S. Rajagopalan
Keyword(s):  
Temperature Dependence ◽  
Indium Antimonide

Some ultrasonic attenuation measurements on indium antimonide and gallium arsenide

1970 ◽  
Vol 315 (1522) ◽  
pp. 369-379 ◽  
Keyword(s):  
Gallium Arsenide ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Indium Antimonide ◽  
Ultrasonic Attenuation ◽  
The Individual

Measurements have been made of the temperature dependence at 1 GHz of the ultrasonic attenuation of various modes in single crystals of n -type indium antimonide and gallium arsenide. The observed attenuation has been compared with predictions based on the work of Simons and Maris which takes into account the finite lifetime of the thermal phonons with which the ultrasonic phonons interact. The agreement obtained is in general acceptable, considering that in the treatment given, there are no adjustable parameters. Further experiments are suggested to identify the individual processes which are responsible for the attenuation. It is suggested that information concerning the lifetime of specific thermal modes may soon be available from such attenuation measurements.

Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

1982 ◽  
Vol 40 ◽  
pp. 78-79
Author(s):  
Kenneth H. Downing ◽  
Robert M. Glaeser
Keyword(s):  
Electron Beam ◽  
Fatty Acid ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Structural Damage ◽  
Direct Result ◽  
Second Step ◽  
Strong Temperature Dependence ◽  
Electron Dose ◽  
Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

Temperature Dependence of Magnetic Domains and Wall Structures

1972 ◽  
Vol 30 ◽  
pp. 496-497
Author(s):  
Sonoko Tsukahara ◽  
Tadami Taoka ◽  
Hisao Nishizawa
Keyword(s):  
Temperature Dependence ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Iron Film ◽  
Objective Lens ◽  
Lorentz Microscopy ◽  
Domain Structures ◽  
Wall Structures ◽  
Crystal Films ◽  
Metallurgical Structure

The high voltage Lorentz microscopy was successfully used to observe changes with temperature; of domain structures and metallurgical structures in an iron film set on the hot stage combined with a goniometer. The microscope used was the JEM-1000 EM which was operated with the objective lens current cut off to eliminate the magnetic field in the specimen position. Single crystal films with an (001) plane were prepared by the epitaxial growth of evaporated iron on a cleaved (001) plane of a rocksalt substrate. They had a uniform thickness from 1000 to 7000 Å.The figure shows the temperature dependence of magnetic domain structure with its corresponding deflection pattern and metallurgical structure observed in a 4500 Å iron film. In general, with increase of temperature, the straight domain walls decrease in their width (at 400°C), curve in an iregular shape (600°C) and then vanish (790°C). The ripple structures with cross-tie walls are observed below the Curie temperature.

Temperature dependence of generation-recombination noise in p-n junctions

2002 ◽  
Vol 12 (3) ◽  
pp. 71-74
Author(s):  
J. A. Jiménez Tejada ◽  
A. Godoy ◽  
A. Palma ◽  
P. Cartujo
Keyword(s):  
Temperature Dependence
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