Magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus, and a magnetic reproducing apparatus

A magnetic reproducing apparatus for reproducing magnetic information recorded on a magnetic medium, comprising:

• a magnetic reproducing head having a magnetic gap at a medium-facing surface, comprising:
• a pair of magnetic yokes of ferromagnetic material having the magnetic gap formed between the pair of magnetic yokes, one of the pair of magnetic yokes having a magnetic tip at the medium-facing surface and a rear portion recessed from the medium-facing surface and magnetically coupled to the magnetic tip, the magnetic tip having a first width in a track width direction at the medium-facing surface, the rear portion having a second width in the track width direction, and the second width being wider than the first width,
• a magnetoresistance effect film recessed from the medium-facing surface, disposed between the pair of magnetic yokes and magnetically coupled to the pair of magnetic yokes of ferromagnetic material, the rear portion of the one of the pair of magnetic yokes and the magnetoresistance effect film being aligned in a track length direction,
• a pair of biasing films recessed from the medium-facing surface, one of the pair of biasing films comprising a hard magnetic material layer disposed adjacent to the rear portion or an antiferromagnetic material layer disposed in contact with the rear portion, the rear portion of the one of the pair of magnetic yokes and the pair of biasing films being aligned in the track width direction;
• an insulation layer disposed between each of the pair of magnetic yokes and the magnetoresistance effect film and also between each of the pair of biasing films and the magnetoresistance effect film.

A magnetic reproducing head having a magnetic gap at a medium-facing surface, comprising:

• a pair of magnetic yokes of ferromagnetic material, each of the pair of magnetic yokes having a magnetic tip at the medium-facing surface and a rear portion recessed from the medium-facing surface and magnetically coupled to the magnetic tip, at least one magnetic tip of the pair of magnetic yokes having a first width in a track width direction at the medium-facing surface, at least one rear portion of the pair of magnetic yokes having a second width in the track width direction, and the second width being wider than the first width;
• a magnetoresistance effect film recessed from the medium-facing surface, disposed between the pair of magnetic yokes and magnetically coupled to the pair of magnetic yokes of ferromagnetic material, the rear portion of one of the pair of magnetic yokes and the magnetoresistance effect film being aligned in a track length direction;
• a pair of biasing films recessed from the medium-facing surface, one of the pair of biasing films comprising a hard magnetic material layer disposed adjacent to the rear portion or an antiferromagnetic material layer disposed in contact with the rear portion, the rear portion of the one of the pair of magnetic yokes and the pair of biasing films being aligned in the track width direction;
• an insulation layer disposed between each of the pair of magnetic yokes and the magnetoresistance effect film and also between each of the pair of biasing films and the magnetoresistance effect film.

A magnetic reproducing apparatus for reproducing magnetic information recorded on a magnetic medium, comprising:

• a magnetic reproducing head having a magnetic gap at a medium-facing surface, comprising:
• a pair of magnetic yokes of ferromagnetic material, each of the pair of magnetic yokes having a magnetic tip at the medium-facing surface and a rear portion recessed from the medium-facing surface and magnetically coupled to the magnetic tip, at least one magnetic tip of the pair of magnetic yokes having a first width in a track width direction at the medium-facing surface, at least one rear portion of the pair of magnetic yokes having a second width in the track width direction, and the second width being wider than the first width,
• a magnetoresistance effect film recessed from the medium-facing surface, disposed between the pair of magnetic yokes and magnetically coupled to the pair of magnetic yokes of ferromagnetic material, the rear portion of one of the pair of magnetic yokes and the magnetoresistance effect film being aligned in a track length direction,
• a pair of biasing films recessed from the medium-facing surface, one of the pair of biasing films comprising a hard magnetic material layer disposed adjacent to the rear portion or an antiferromagnetic material layer disposed in contact with the rear portion, the rear portion of the one of the pair of magnetic yokes and the pair of biasing films being aligned in the track width direction;
• an insulation layer disposed between each of the pair of magnetic yokes and the magnetoresistance effect film and also between each of the pair of biasing films and the magnetoresistance effect film.