Microstructure and magnetic property of Co/Cu multilayers

Co/Cu multilayers consisting of 120 bilayers, [Co(3.5 Angstrom)/Cu(t)](120) With t=15.8 Angstrom and 18.3 Angstrom, were fabricated on glass substrates by de magnetron sputtering, and their magnetic properties were investigated. The Co layers in a multilayer are found to be an aggregate of ferromagnetic and superparamagnetic Co clusters dispersed in a Cu matrix. The present Co/Cu multilayers are revealed to be periodically modulated granular alloys with stochastic ferromagnetic structure.X111sciescopu