Low magnetic flux density interface layer for spin torque oscillator
AssigneeWestern Digital Technologies, Inc.
InventorsSusumu Okamura, Masashige Sato, Keiichi Nagasaka, Yo Sato
Life of this patent
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Abstract
A magnetic field-assisted magnetic recording (MAMR) head is provided, which includes a recording main pole, a seed layer, and a spin torque oscillator (STO) positioned over the main pole, in this order, in a stacking direction from a leading side to a trailing side of the recording head. The STO comprises a spin polarized layer (SPL), an interlayer with fcc structure, and a field generating layer (FGL), in this order in the stacking direction. The FGL comprises a low magnetic flux density interface (LMFDI) layer with bcc structure that directly contacts the interlayer.
Claims22
A magnetic field-assisted magnetic recording (MAMR) head comprising:
- a recording main pole;
- and
- a seed layer and a spin torque oscillator (STO) positioned over the main pole, in this order in a stacking direction from a leading side to a trailing side of the recording head, wherein
- the STO comprises a spin polarized layer (SPL), an interlayer with fcc structure, and a field generating layer (FGL), in this order in the stacking direction, and
- the FGL comprises at least three different magnetic materials, including a low magnetic flux density interface (LMFDI) layer with bcc structure that directly contacts the interlayer.
A magnetic field-assisted magnetic recording (MAMR) head comprising:
- a recording main pole;
- and
- a seed layer and a STO positioned over the main pole, in this order in a stacking direction from a leading side to a trailing side of the recording head, wherein
- the STO comprises a field generating layer (FGL), an interlayer with fcc structure, and a spin polarized layer (SPL), in this order in the stacking direction, and
- the SPL comprises a LMFDI layer with bcc structure that directly contacts the interlayer.
Dependencies are inferred from the claim text.