Negative temperature coefficient of resistance in a crystalline compound

Resistivity measurements and temperature-dependent X-ray structural analyses are reported for the crystalline compounds GdPd 3 B x C 1- x . We show that a controlled tuning of the temperature coefficient of resistance (TCR) can be done by modifying the structural parameters and chemical environment of the compounds. We have achieved the result of negative TCR in an ordered, non-Kondo crystalline compound. Electronic-structure calculations have been carried out to elucidate some of our observations.