Magnetoresistive head having longitudinal biasing by providing undirectional magnetic anisotropy

   
   

There is provided a magnetoresistive head which can realize high sensitivity and low noise even when the reading track is being reduced. Longitudinal biasing is performed to a ferromagnetic free layer whose magnetization is rotated according to an external magnetic field by providing unidirectional magnetic anisotropy by exchange coupling to an antiferromagnetic layer. A hard magnetic film is arranged at the edge of a magnetoresistive film to reduce an effective reading track width.

Se proporciona una cabeza magnetoresistente que pueda realizar alta sensibilidad y ruido bajo incluso cuando se está reduciendo la pista de la lectura. El predisponer longitudinal se realiza a una capa libre ferromagnética que magnetización sea rotada según un campo magnético externo proporcionando anisotropy magnético unidireccional por el intercambio que se junta a una capa antiferromagnetic. Una película magnética dura se arregla en el borde de una película magnetoresistente para reducir una anchura de pista eficaz de la lectura.

 
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