MAGNETIC-PROPERTIES AND INTERLAYER COUPLING OF CO AL SUPERLATTICES/

Interlayer exchange coupling in Co/Al multilayers was investigated wit h ferromagnetic resonance and magnetoresistance measurements. For samp les with d(Al) less than or equal to 19 Angstrom, spin waves were obse rved for perpendicular geometry, which implied that spin waves were su stained by the whole film and propagated through Al sublayers. Two mag netoresistance peaks corresponding to antiferromagnetic coupling betwe en the cobalt layers were observed with increasing Al spacer thickness , but the strongest peak occurred for d(Al) = 23 Angstrom.