Int. J. Mod. Phys. B. 7 (1992) 419-424

Connection between giant magnetoresistance and roughness in sputtered 
Fe/Cr superlattices

David M. Kelly, Eric E. Fullerton, F. T. Parker, J. Guimpel, Y. 
Bruynseraede, and Ivan K. Schuller

Detailed structural, magnetotransport, magnetization and Mössbauer 
measurements of sputtered Fe/Cr superlattices are presented. The 
interfacial roughness of the superlattice can be controlled systematically 
and reproducibly by sputtering at different Ar pressures. Conversion 
electron Mössbauer spectroscopy results indicate that the amount of 
interdiffusion remains constant in the films as the interfacial roughness 
increases. The results show that roughness enhances the magnetoresistance 
for all Cr thickness in the range of 10 to 40 angstrom.