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Interlayer exchange coupling observed by MOKE in GdxCo 1-x/Gdx/Co1-x' amorphous bilayers

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2 Author(s)
Morales, R. ; Dept. de Fisica, Oviedo Univ., Spain ; Alameda, J.M.

The magnetic behavior of single layers and bilayers of ferrimagnetic amorphous GdxCo1-x (0.38>x>0.21), where the thickness of the individual layer was 100 nm, was analyzed by bulk magnetometry (VSM, AGM) and transverse Kerr effect (TMOKE) in the temperature range of 10 K-300 K. The compensation temperatures were: Tcomp>300 K and Tcomp=230 K for x>0.23 and x=0.21, respectively. For Gd0.21Co0.79 /Gd0.38Co0.62 bilayers, the strong Co-Co exchange coupling at the interface gives rise to a macroscopic ferrimagnet behavior for the net magnetizations of the bilayer when T>230 K. Otherwise, reversible coherent rotation of the magnetization was observed when the field is applied perpendicular to the as-grown in-plane uniaxial easy axis of the bilayer

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 4 )