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Dependence of exchange coupling in permalloy/Cr82Al18 bilayers on the constituent layer thickness
2000
Journal of Applied Physics
Preserved Fulltext
Due to a weaker exchange coupling, the coercivity in permalloy/Cr 82 Al 18 bilayers of thicknesses t FM and t AF , respectively, has been found to vary as 1/t FM 3/2 at room temperature, a behavior previously only observed at low temperatures. At room temperature, the exchange field decreases when t AF is less than 40 nm and vanishes at 25 nm. Switching in wedged-permalloy/Cr 82 Al 18 bilayers consists of two macroscopic domains with one domain wall moving along the wedge direction.
doi:10.1063/1.372802
fatcat:m5wprmtjmzhzvjnioa4rssba2m