Journal of Applied Sciences ›› 1984, Vol. 2 ›› Issue (3): 195-202.

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HEAT TREATMENT OF Hg0.8Cd0.2Te AT 600℃ IN A CLOSED SYSTEM

XIA YIBEN1, CAO ZECHUN1, TANG DINGYUAN2   

  1. 1. Shanghai University of Science and Technology;
    2. Shanghai Institute of Technical Physics, Academia Sinica
  • Received:1982-09-11 Online:1984-09-30 Published:1984-09-30

Abstract: The P-type conversions of Hg0.8Cd0.2Te after short-time (10'-15') heat treatment at high-temperature (600℃) are explained by mercury-vacancy diffusion, model, the heat treatmented samples are thinned step by step, and the Hall coefficients and resistivities are measured at 77 K for each step. The distributions of mercury vacancy in the samples are thus found from these measurements It is found that the experimental results are in good agreement with the mercury-vacancy diffusion model. The diffusion cofficient of meroury vacancy in Hg0.5Cd0.2Te at 600℃ is estimated to be about 2×105μm2/h. Its activation energy Q is about 0.6eV. The final concentration of mercury vacancy in the samples, Lf varies inversely as Hg-presure in the closed system. Its proportionality factor, Kf/Ki is 5×1019cm-3atm.