What is the physical significance of negative magnetoresistance at room temperature and positive MR at low temperature ?

04 April 2016 1 9K Report

What is the physical significance of negative magnetoresistance at room temperature and positive MR at low temperature in a low band gap semiconductor.

While the semiconductor is doped with transition metal in dilute quantity.

Dinesh Kumar Dixit

Please provide more specific details about the material, dopent and the transition temperature.

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