Spin-valve thin-film magnetic element with a ferromagnetic underlayer of hard bias

   
   

A spin-valve thin-film magnetic element includes a laminate formed on a substrate, the laminate including an antiferromagnetic layer, a pinned magnetic layer in contact with the antiferromagnetic layer, a nonmagnetic conductive layer in contact with the pinned magnetic layer, and a free magnetic layer in contact with the nonmagnetic conductive layer; bias layers formed on both sides in the track-width direction of the laminate; and electrode layers formed on the bias layers. The bias layers are in contact with both sides of the laminate and extend over the peripheral sections of the laminate with ferromagnetic bias underlying layers therebetween, the bias underlying layers being composed of Fe or an Fe--Co alloy with a thickness of 1.6 to 4.3 nm. A method for fabricating a spin-valve thin-film magnetic element is also disclosed.

Um elemento magnético thin-film da gir-válvula inclui um laminate dado forma em uma carcaça, o laminate including uma camada antiferromagnetic, uma camada magnética fixada no contato com a camada antiferromagnetic, uma camada condutora nonmagnetic no contato com a camada magnética fixada, e uma camada magnética livre no contato com a camada condutora nonmagnetic; as camadas diagonais deram forma em ambos os lados no sentido da trilha-largura do laminate; e as camadas do elétrodo deram forma nas camadas diagonais. As camadas diagonais estão no contato com ambos os lados do laminate e estendem sobre as seções periféricas do laminate com camadas subjacentes diagonais ferromagnetic therebetween, as camadas subjacentes diagonais que estão sendo compostos do Fe ou um Fe -- liga do Co com uma espessura de 1.6 a 4.3 nm. Um método para fabricar um elemento magnético thin-film da gir-válvula é divulgado também.

 
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