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Growth and impurity characterisation ofblue crystals of cuals2

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Abstract

Blue crystals of CuAlS2 were grown for the first time by the closed tube vapour transport method. Colourless crystals were also grown. A Small difference in the fundamental energy gap of the blue and colourless crystals was detected by optical absorption spectrometry. Absorption peaks characteristic of Fe+++ impurity were detected in the spectra of only blue crystals. Fe+++ concentration in the blue crystals was estimated from the room temperature magnetic susceptibility measurement. Prom the survey of the magnetic susceptibility data of the composition CuFexAl(1-x)S2 it is suggested that with 450ppm Fe+++ concentration CuAls2 may exhibitzero magnetic susceptibility at room temperature.

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Authors and Affiliations

  1. Deparmento de Fisica, Universidad de Los Andes, Merida, Venezuela

    E. Guerrero & V. Sagredo

  2. H.H.Wills Physics Laboratory, University of Bristol, BS8 1TL, Bristol

    J. S. Shah

Authors
  1. E. Guerrero
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  2. V. Sagredo
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  3. J. S. Shah
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Guerrero, E., Sagredo, V. & Shah, J.S. Growth and impurity characterisation ofblue crystals of cuals2 . J. Electron. Mater. 10, 987–998 (1981). https://doi.org/10.1007/BF02661188

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  • DOI: https://doi.org/10.1007/BF02661188

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