Biasing layers for a magnetoresistance effect magnetic head using perpendicular current flow
AssigneeFujitsu Limited
InventorsKenichi Aoshima, Kenji Noma
Life of this patent
Estimating the term…
Abstract
A magnetoresistance effect magnetic head includes a magnetoresistance effect element having a first end and a second end. A biasing portion is provided at the first end and the second end of the magnetoresistance effect element for applying a longitudinal bias magnetic field to the magnetoresistance effect element at the first end or the second end. The biasing portion includes an intermediate layer disposed between an antiferromagnetic first layer and a second layer.
Claims19
A CPP magnetoresistance effect magnetic head comprising:
- an electrically conductive upper shield and an electrically conductive lower shield;
- a magnetoresistance effect element disposed between said upper shield and said lower shield and having a first end and a second end;
- and
- a biasing portion provided at said first end and said second end of said magnetoresistance effect element for applying a longitudinal bias magnetic field to said magnetoresistance effect element at one of said first end and said second end of said magnetoresistance effect element,
- said biasing portion including a magnetic intermediate layer, a first antiferromagnetic layer provided between said intermediate layer and said upper shield layer for insulating said intermediate layer from said upper shield, and a second layer provided between said intermediate layer and said lower shield.
A magnetic recording/reproducing apparatus having at least one magnetic recording medium rotatably mounted therein, comprising:
- an actuator pivotally mounted in said magnetic recording/reproducing apparatus;
- an arm having a proximate end and a distal end, said proximate end being connected to said actuator;
- a suspension having a base end and a mounting portion, said base end being connected to said distal end of said arm;
- a slider attached to said mounting portion;
- and
- a CPP magnetoresistance effect magnetic head attached to said slider, said magnetoresistance effect magnetic head including,
- an electrically conductive upper shield and an electrically conductive lower shield,
- a magnetoresistance effect element disposed between said upper shield and said lower shield and having a first end and a second end, and
- a biasing portion provided at said first end and said second end of said magnetoresistance effect element for applying a longitudinal bias magnetic field to said magnetoresistance effect element at one of said first end and said second end of said magnetoresistance effect element,
- said biasing portion including a magnetic intermediate layer, a first antiferromagnetic layer provided between said intermediate layer and said upper shield layer for insulating said intermediate layer from said upper shield, and a second layer provided between said intermediate layer and said lower shield layer.
Dependencies are inferred from the claim text.