Figure 2: Spring-magnet behaviour and enhanced coercivity.
From: Long-range magnetic interactions and proximity effects in an amorphous exchange-spring magnet
(a) The magnetization along the easy axis for three different temperatures, showing the exchange coupling between the top and bottom layers. The middle layer thicknesses dB is 10 nm. (b) The lower coercive field 
as a function of temperature (absolute and normalized by 
), for three different middle layer thicknesses dB. The dashed vertical line indicates the intrinsic transition temperature of Co60AlZr40. A coupling between the top and bottom layers is seen in a region well above the intrinsic transition temperature of the middle layer when dB=10 nm (highlighted by the blue shaded area).
