Resumo

HURTADO, N. Modelo de multicapas Gd_1-xCo_x/Co y la dependencia de su comportamiento con la variación del espesor de la capa ferromagnética Gd_1-xCo_x. Rev. mex. fis. [online]. 2006, vol.52, suppl.3, pp.158-160. ISSN 0035-001X.

A numerical study of the changes over magnetics properties observed in multilayers Gd_1-xCo_x/Co have been done. It is found that the compensation temperature shows a abrupt decrease when the thickness of the ferrimagnetic layer (Gd_1-xCo_x) has been increased. It has been observed that after some value of the ferrimagnetic layer thickness, the compensation temperature becomes independent of the layer growing, as observed in experimental work. Due to finite size effects, the critical temperature is sensible to small variations of the thickness of the Gd_1-xCo_x layer. The whole magnetization of the multilayers present a value different from zero for a wide range of temperature since the critical temperature of the Gd is very high compared with the one of the Co. The critical temperature is constant in the whole range where compensation temperature exists.

Palavras-chave : Multilayers; Gd/Co; ising; ferrimagnetic; compensation temperature.

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