Magnetic properties of SmCo/Fe/SmCo trilayer films

Abstract Sm 22 Co 78 /Fe/Sm 22 Co 78 trilayers with 30% volume fraction of Fe layer were deposited on Cr/glass substrates by magnetic sputtering. All the samples have in-plane anisotropy and their hysteresis loops were single-phase types, indicating that the two phases exhibit strong exchange coupling. The reduced remanence of the trilayer system is significantly increased with the increasing thickness of Fe layer ( d ), the coercivity of the trilayer also increased for the layer with d nm , and have a maximum value at 13 nm for 30% volume fraction of Fe layer. The magnetic interaction studies indicated that positive and negative exchange couplings were different for different d values.