Showing papers on "Antimonide published in 1973"
TL;DR: In this paper, the authors developed an expression for the softening of an elastic constant of dysprosium antimonide, which is due to a Jahn-Teller coupling between magnetic ions whose ground manifolds are split into several levels by a crystalline field.
Abstract: The author develops an expression for the softening of an elastic constant of dysprosium antimonide. This softening is due to a Jahn-Teller coupling between magnetic ions whose ground manifolds are split into several levels by a crystalline field. This expression is evaluated in the molecular-field approximation and further approximated by considering only quadrupolar interactions. A good fit to the thermal variation of the elastic constant of dysprosium antimonide Ctheta =1/2(C11-C12) is obtained by suitably choosing the background elastic constant, the Jahn-Teller strain coupling gtheta and the biquadratic coupling Itheta . Several physical mechanisms are discussed which give rise to the fitted values of the parameters and to the structural and magnetic phase transition at 9.5K. It is concluded that the phase transition is driven by approximately equal amounts of strain coupling gtheta and exchange interactions.
54 citations
TL;DR: In this article, the elastic constants of DySb near its 9.5 K phase transition are calculated using a simple model for the states of the Dy ions and good agreement with experiment is obtained above the transition but there are large discrepancies in the low temperature phase.
Abstract: The elastic constants of DySb near its 9.5 K phase transition are calculated using a simple model for the states of the Dy ions. Good agreement with experiment is obtained above the transition but there are large discrepancies in the low temperature phase. It is argued that his disagreement is not a consequence of the model for the states.
11 citations
TL;DR: In this paper, the first truly in situ electron diffraction results obtained from semitransparent alkali antimonide photocathodes during processing were presented, which were used to determine the texture patterns of films of polycrystalline material.
Abstract: This paper presents what are thought to be the first truly in situ electron diffraction results obtained from semitransparent alkali antimonide photocathodes during processing. A scanning electron diffraction system specially constructed for the purpose (Beck and Robbie 1972) has been used to record the diffraction patterns of caesium antimonide photocathodes directly during growth, and evidence has been found to suggest that high photosensitivity may be related to an ordered crystal structure. Antimony thin films have also been studied and the nature of texture patterns found in films of polycrystalline material has been determined.
8 citations
TL;DR: In this paper, the authors investigated the electrical conductivity, Hall effect, Nernst-Ettingshausen effect, thermoelectric power, and thermal conductivity of a narrow band gap semiconductor, platinum antimonide single crystals, over a wide temperature range.
Abstract: The electrical conductivity, Hall effect, Nernst-Ettingshausen effect, thermoelectric power, and thermal conductivity of a narrow band gap semiconductor, platinum antimonide single crystals, have been investigated over a wide temperature range. On the basis of these measurements it was possible to calculate mobilities and effective masses of electrons and holes and their concentrations in the intrinsic region. It is shown that the mobility ratio μn/μp < 1 and that the effective mass of holes is less than that of electrons.
[Russian Text Ignored]
3 citations
31 Jul 1973
TL;DR: In this article, the results of a twenty-month study of various compounds of boron with the group five elements phosphorus, arsenic, and antimony were summarized, and X-ray studies were performed to determine if and to what degree the compounds produced in this study exhibited the ideal ordered zincblende structure.
Abstract: : The report summarizes the results of a twenty month study of various compounds of boron with the group five elements phosphorus, arsenic, and antimony. Methods of preparation of high purity boron phosphide, boron subphosphide, and boron subarsenide were used to produce these compounds for further study, while boron arsenide was produced only as a mixture with large amounts of boron, assumed to be free or unreacted. X-ray studies of boron phosphide and boron arsenide were performed to determine if and to what degree the compounds produced in this study exhibited the ideal ordered zincblende structure. The results for boron arsenide show closer agreement with theoretical predictions than previous studies. Dense compacts of vapor deposited boron phosphide were formed as samples for window material studies. A feasibility study of the preparation of boron antimonide in 100 gram quantities determined that such a process is apparently not feasible. (Modified author abstract)
1 citations