MAGNETORESISTANCE EFFECT ELEMENT, MAGNETIC HEAD, MAGNETIC HEAD ASSEMBLY, MAGNETIC RECORDING AND REPRODUCING DEVICE, AND METHOD FOR MANUFACTURING MAGNETORESISTANCE EFFECT ELEMENT

摘要

According to one embodiment, a magnetoresistance effect element includes first and second shields, first and second side magnetic units, a stacked body, and a hard bias unit. The first side magnetic unit includes a first soft magnetic layer, a first nonmagnetic intermediate layer, and a second soft magnetic layer. The second side magnetic unit includes a third soft magnetic layer, a second nonmagnetic intermediate layer, and a fourth soft magnetic layer. The stacked body includes a fifth ferromagnetic layer, a third nonmagnetic intermediate layer, and a sixth ferromagnetic layer. The hard bias unit is provided between the first and second shields. A first distance between the first and fifth magnetic layers is shorter than a second distance between the second and sixth magnetic layers. A third distance between the third and fifth magnetic layers is shorter than a fourth distance between the fourth and sixth magnetic layers.

主权项

1. A magnetoresistance effect element, comprising:
a first shield; a second shield; a first side magnetic unit including
a first magnetic layer provided between the first shield and the second shield, the first magnetic layer being soft magnetic,a first intermediate layer provided between the first magnetic layer and the second shield, the first intermediate layer being nonmagnetic, anda second magnetic layer provided between the first intermediate layer and the second shield, the second magnetic layer being soft magnetic; a second side magnetic unit including
a third magnetic layer provided between the first shield and the second shield to be separated from the first side magnetic unit in a second direction intersecting a first direction from the first shield toward the second shield, the third magnetic layer being soft magnetic,a second intermediate layer provided between the third magnetic layer and the second shield to be separated from the first side magnetic unit in the second direction, the second intermediate layer being nonmagnetic, anda fourth magnetic layer provided between the second intermediate layer and the second shield to be separated from the first side magnetic unit in the second direction, the fourth magnetic layer being soft magnetic; a stacked body including
a fifth magnetic layer provided between the first shield and the second shield and between the first side magnetic unit and the second side magnetic unit, the fifth magnetic layer being ferromagnetic and having a first surface area,a third intermediate layer provided between the fifth magnetic layer and the second shield, the third intermediate layer being nonmagnetic, anda sixth magnetic layer provided between the third intermediate layer and the second shield, the sixth magnetic layer being ferromagnetic and having a second surface area less than the first surface area; and a hard bias unit provided between the first shield and the second shield to be arranged with the stacked body in a third direction intersecting the first direction and intersecting the second direction, a saturation magnetic flux density of the fifth magnetic layer being less than a saturation magnetic flux density of the sixth magnetic layer.