Enhancement in energy product in Sm-Co/Fe exchange coupled magnetic layers with molybdenum interlayers

Trilayers of Sm-Co/Mo/Fe were deposited by DC and RF magnetron sputtering on Si (100) substrate at 650 °C. Effect of very thin Mo interlayers on energy product of magnetic layers was studied. All the samples showed strong exchange coupling and single phase behavior. With increasing Mo interlayer thickness, we observed oscillating behavior of saturation magnetization and energy product. The rise in energy product was observed as 22% for 0.3 nm Mo interlayer as compared to sample without Mo interlayer.