PERPENDICULAR ELECTRICAL-CONDUCTION IN CU CR MULTILAYER FILMS AT LOW-TEMPERATURES/

The electrical resistivity and the temperature coefficient of resistan ce (TCR) of Cu/Cr multilayer films have been studied in the temperatur e range 30-300 K. Two sets of film are investigated, one with a consta nt number of double layers and increasing bilayer wavelength A in the range 4-12 nm, and the other with constant A and a varying number of d ouble layers n in the range 5-30. The bilayer wavelength dependence of room temperature resistivity rho(RT) and TCR exhibits oscillatory beh aviour. The TCR is found to be proportional to the inverse of the bila yer wavelength. The experimental results are analyzed in the light of the Mayadas and Shatzkes model.