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Dependence of exchange coupling in permalloy/Cr82Al18 bilayers on the constituent layer thickness
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https://doi.org/10.1063/1.372802Abstract
Due to a weaker exchange coupling, the coercivity in permalloy/Cr82Al18 bilayers of thicknesses tFM and tAF, respectively, has been found to vary as 1/tFM3/2 at room temperature, a behavior previously only observed at low temperatures. At room temperature, the exchange field decreases when tAF is less than 40 nm and vanishes at 25 nm. Switching in wedged-permalloy/Cr82Al18 bilayers consists of two macroscopic domains with one domain wall moving along the wedge direction.
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