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The first successful metallic rectifier was the cuprous oxide type first announced in 1920. In spite of the fact that several other types have been discovered since, there have been no other oxide rectifiers reported, and only a few patents have even referred to possibilities. The reasons for this presumably lie in the stringent requirements for a rectifier. First, the oxide must be formed as a thin,...
The electrical properties of titanium dioxide semiconductors have been under study for several years.1,2,3,4 In general, however, the previous studies were only of the electrical conductivity of ceramics so that little information about the properties of the rutile lattice is available. Recently, however, synthetic rutile crystals have been placed on the market∗, and an investigation of their electrical...
The relative maturity of the field of dielectrics is well illustrated by the fact that in 1949, as in 1948, the most interesting developments were in borderline subjects rather than in the extensive volume of research on dielectrics as such. One such borderline topic is a very active field of contemporary physics, solid state electronics. Investigations in this field are included in several sections...
The new anomalous electrical response recently found1 in simple ionic crystals has been studied in crystals of alkali halides containing foreign ions. The results obtained shed considerable light on the nature of the phenomenon in the pure crystal, and, in addition, indicate that it is possible to study the diffusion of foreign ions in ionic crystals with this method.
Recent measurements of specific heats1, and accurate equation-of-state data for hydrogen cyanide2 have indicated substantial amounts of polymerization in the vapor state. Despite many previous, determinations of its dipole moment3, no note of any effect that polymerization may have on the moment has been found in the literature. An attempt to find such an effect, and to correlate it quantitatively...
With this issue of the “Digest of the Literature on Dielectrics,” a new section on semiconductors is being included. It may seem a little unexpected for conducting materials to be covered by a publication normally dealing with insulators. Modern theories of the solid state, however, have revealed the intimate relations existing between all types of solids; so the section represents an extension of...
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