Transport properties of Ni/W superlattices

Transport properties of Ni/W superlattices have been studied between 15 K a nd room temperature. With the decrease of temperature, an anomalous jump of resistance has been found which is thought to be due to an increase of the defect density in Ni/W samples. Small positive magnetoresistance effect ha s been observed in samples with thin nickel layer thickness. Lorentz force magnetoresistance is taken into account to explain the resistance variation behavior of Ni/W superlattices in externally applied magnetic field. (C) 1 999 Elsevier Science B.V. All rights reserved.