Abstract:
There are disclosed diodes for detection and diodes for emission of near-infrared radiation. Such a diode employs an epitaxial layer of n-type cadmium tin phosphide grown on a p-type InP substrate, which is the light-transmitting window of the device. Also diclosed is a tipping technique of epitaxial growth in which the conditions of the substrate crystal and the tin-rich melt are controlled to obtain high quality heterojunctions. A mixture of tin, phosphorus, and cadmium is prepared in a separate saturation procedure to minimize substrate degradation during epitaxial growth. The indium phosphide substrates are high quality and ptype with predominantly cadmium or zinc doping. In some diodes the CdSnP2 epitaxial layers contain some indium traceable to dissolution of the indium phosphide substrate by the tin solution prior to nucleation and growth of the epitaxial layer. Later diodes grown from solutions containing controlled amounts of indium intentionally added to the presaturated melt, efficiently emitted infrared light near 1.0 Mu .
Abstract:
It has been found that vapor deposition of the ferromagnetic material MnAlGe onto a substrate will give a thin film having the easy direction of magnetization normal to the substrate. This unusual capability does not depend on epitaxial growth and, indeed, the preferred embodiment calls for the use of an amorphous substrate. This inherent property of MnAlGe makes it useful for the class of magnetic devices operating on the principle of the reversal of the direction of magnetization of isolated regions for the purpose of information storage.
Abstract:
Film materials produced by low temperature deposition show a variety of device-significant properties. Film compositions center about the nominal formulae Mo5Ru3 and W3Ru2. Films, conveniently deposited by sputtering, show high values of hardness, corrosion resistance, and reflectivity. Resistivities, as well as temperature coefficient of resistance, may be varied over a broad range dependent upon deposition temperature.
Abstract:
The metallic compound AuIn2 is useful as a thermometer or a refrigerant in the temperature region below 0.1*K. Its utility extends to the submillidegree Kelvin region. The thermometric parameter is its static nuclear magnetic susceptibility, which is relatively large. The refrigerating technique of adiabatic demagnetization is also applicable to the large nuclear magnetic moments of this material. The product of temperature and spinlattice relaxation time of AuIn2 is approximately constant in this temperature range and equal to 0.09 seconds-*K giving approximately 1 second relaxation time at 0.1*K and 1 minute at 1 millidegree K.
Abstract:
There are disclosed diodes for detection and diodes for emission of near-infrared radiation. Such a diode employs an epitaxial layer of n-type cadmium tin phosphide grown on a p-type InP substrate, which is the light-transmitting window of the device. Also disclosed is a tipping technique of epitaxial growth in which the conditions of the substrate crystal and the tin-rich melt are controlled to obtain high quality heterojunctions. A mixture of tin, phosphorus, and cadmium is prepared in a separate saturation procedure to minimize substrate degradation during epitaxial growth. The indium phosphide substrates are high quality and p-type with predominantly cadmium or zinc doping. In some diodes the CdSnP2 epitaxial layers contain some indium traceable to dissolution of the indium phosphide substrate by the tin solution prior to nucleation and growth of the epitaxial layer. Later diodes grown from solutions containing controlled amounts of indium intentionally added to the presaturated melt, efficiently emitted infrared light near 1.0 Mu .
Abstract:
There are disclosed indium phosphide p-n junction diodes providing efficient room temperature electroluminescence at wavelengths between 0.98 and 1.10 micrometers and comprising at least an n-type portion containing substantial quantities of cadmium and tin but forming a minor constituent in the n-type portion. The p-type portion is typically zinc or cadmium doped single crystal indium phosphide used as the substrate in the fabrication process. The n-type portion is epitaxially deposited by liquid phase epitaxial from tin solution. The resulting diode emits efficiently at the 1.05 micrometer wavelength of low loss glass fibers and also provides a better match to the absorption wavelength of infrared-to-visible frequency-converting phosphor than does a gallium arsenide laser or electroluminescence diode. External efficiencies exceeding 1 percent have been obtained.