Volume 84, Number 4, November 2008
Article Number 47007
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 17 November 2008
EPL, 84 (2008) 47007
DOI: 10.1209/0295-5075/84/47007

Negative temperature coefficient of resistance in a crystalline compound

Abhishek Pandey1, 2, Chandan Mazumdar2, R. Ranganathan2, 3, Molly De Raychaudhury1, T. Saha-Dasgupta1, Saurabh Tripathi4, Dhananjai Pandey4 and S. Dattagupta3

1   S. N. Bose National Centre for Basic Sciences - Block-JD, Salt Lake, Kolkata-700098, India
2   ECMP Division, Saha Institute of Nuclear Physics - 1/AF, Bidhannagar, Kolkata-700064, India
3   Indian Institute of Science Education and Research - Block-HC, Kolkata-700106, India
4   Institute of Technology, Banaras Hindu University - Varanasi-221005, India

received 7 June 2008; accepted in final form 9 October 2008; published November 2008
published online 17 November 2008

Resistivity measurements and temperature-dependent X-ray structural analyses are reported for the crystalline compounds GdPd3BxC1-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.

72.15.Eb - Electrical and thermal conduction in crystalline metals and alloys.
71.20.Eh - Electron density of states and band structure of crystalline solids: Rare earth metals and alloys.
61.05.cp - X-ray diffraction.

© EPLA 2008