Amorphous FeCoSiB for exchange bias coupled and decoupled magnetoelectric multilayer systems: Real-structure and magnetic properties
作者： V. Hrkac , E. Lage , G. Köppel , J. Strobel , J. McCord
DOI: 10.1063/1.4896662
关键词:
摘要: The effect of field annealing for exchanged biased multilayer films is studied with respect to the resultant structural and magnetic film properties. presented stacks comprise repeating sequences Ta/Cu/{1 1 1} textured antiferromagnetic Mn70Ir30/amorphous ferromagnetic Fe70.2Co7.8Si12B10. Within layers crystalline filaments are observed. An additional Ta layer between antiferromagnet ferromagnet used in order investigate separate influence common Mn70Ir30/Fe70.2Co7.8Si12B10 interface on occurring changes. In situ ex transmission electron microscopy a comprehensive structure characterization selected temperature stages. Up 250 °C, multilayers structurally unaltered preserve as-deposited condition. A deliberate increase 350 °C exhibits different crystallization processes films, depending presence crystal nuclei within amorphous layer. volume-to-surface ratio process emphasized by comparison investigations as respective specimen thickness changed. Complementary studies reveal defined exchange bias obtained at first step decrease total anisotropy partial after subsequent 350 °C.
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