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Diffusion vs migration in solid state

  1. Jun 22, 2008 #1
    I do not understand the difference between diffusion and migration is case of anion/cations.
    Thank you!
  2. jcsd
  3. Jun 23, 2008 #2
    Migration is a special case of diffusion, that is ,migration have polarity (from side to another) just as in case of PN junction , electrons diffuse in one direction and holes in the other.

    In case of anions and cations , Polarity exists , so the accompanied motion is migration from +ve to -ve and vice versa
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