Resumo

FERMIN, José. R. Exchange-biased Fe_4.6CO_70.4Si₁₅B₁₀/NiO bilayers. Rev. LatinAm. Metal. Mater. [online]. 2015, vol.35, n.2, pp.254-258. ISSN 0255-6952.

We report on experimental evidence of exchange bias between the amorphous ferromagnetic (FM) Fe_4.6Co_70.4Si₁₅B₁₀ and an antiferromagnetic (AF) NiO film, grown onto single crystalline Si(001) wafers. Surface Magneto-optic Kerr Effect (SMOKE) has been used to measure the hysteresis loop shift, and coercivity, as functions of the azimuthal angle, φ_H, and the FM layer thickness, t. The measurements reveal the presence of induced unidirectional and uniaxial symmetries following a complex cosine dependence, and thickness dependence proportional to 1/t, typical of interfacial effects.

Palavras-chave : Exchange-bias; Unidirectional anisotropy; Surface Magneto-optic Kerr Effect; ferromagneticantiferromagnetic bilayers.

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