Time dependent magnetics of exchange biased spin valves

Different sweep field rates result in different pinning field and coercivity in the pinned layer of a spin valve. Annealed samples showed more profound time dependent magnetic properties as compared to the as-made films. The pinning field decreases with the sweep rate if the AFM layer is thinner than a minimum thickness. The coercivity increases with the sweep rate and is also FM layer thickness dependent. The thin FM layer showed less effect than the thicker FM layer.