Method and system for fabricating magnetic transducers with improved pinning
View Patent ↗A method comprises providing a magnetic element including a free layer, a pinned layer, a nonmagnetic spacer layer between the free and pinned layers, and a pinning layer adjacent the pinned layer. The free layer is biased in a first direction. The pinned layer has a first layer having a first magnetization, a second layer having a second magnetization, and a nonmagnetic layer between the first and second layer. The first magnetization is pinned parallel to a second direction substantially perpendicular to the first direction and substantially perpendicular to the ABS. The second magnetization is antiparallel to the second direction. The pinning layer is oriented along the second direction. The method further comprises providing a hard bias structure having a hard bias magnetization, initializing the hard bias magnetization along the second direction, performing at least one thermal treatment, and resetting the hard bias magnetization substantially along the first direction.
1. A magnetic transducer comprising:
a magnetic element including a free layer, a pinned layer, a nonmagnetic spacer layer between the free layer and the pinned layer, and a pinning layer adjacent to and sharing an interface with the pinned layer, the free layer being configured to be biased in a first direction, the pinned layer having a pinned layer magnetization configured to be pinned by the pinning layer in a second direction, the pinned layer magnetization oriented along the second direction, the pinned layer having a pinned layer rotation peak at an antiparallel applied field of at least five thousand Oe, the pinned layer rotation peak corresponding to a rotation in of the pinned layer magnetization from the second direction at the antiparallel applied field of at least five thousand Oe; and
a hard bias structure adjacent to the magnetic element and having a hard bias magnetization along the first direction.
2. The transducer of claim 1 wherein the second direction is perpendicular to the first direction.
3. A disk drive comprising:
a slider;
at least one transducer residing on the slider, the at least one transducer including a magnetic element and a hard bias structure, the magnetic element including a free layer, a pinned layer, a nonmagnetic spacer layer between the free layer and the pinned layer, and a pinning layer adjacent to and sharing an interface with the pinned layer, the free layer being configured to be biased in a first direction, the pinned layer having a pinned layer magnetization configured to be pinned by the pinning layer in a second direction, the pinned layer magnetization oriented along the second direction, the pinned layer having a pinned layer rotation peak at an antiparallel applied field of at least five thousand Oe, the pinned layer rotation peak corresponding to a rotation in of the pinned layer magnetization from the second direction at the antiparallel applied field of at least five thousand Oe, the hard bias structure being adjacent to the magnetic element and having a hard bias magnetization along first direction.
4. The disk drive of claim 3 wherein the second direction is perpendicular to the first direction.
5. A magnetic recording drive comprising:
a head including at least one transducer, the at least one transducer including a magnetic element and a hard bias structure, the magnetic element including a free layer, a pinned layer, a nonmagnetic spacer layer between the free layer and the pinned layer, and a pinning layer adjacent to and sharing an interface with the pinned layer, the free layer being configured to be biased in a first direction, the pinned layer having a pinned layer magnetization configured to be pinned by the pinning layer in a second direction, the pinned layer magnetization oriented along the second direction, the pinning layer having an exchange coupling with the pinned layer of at least five thousand Oe, the hard bias structure being adjacent to the magnetic element and having a hard bias magnetization along first direction.
6. The transducer of claim 5 wherein the second direction is perpendicular to the first direction.