Magnetic write head with high moment magnetic thin film formed over seed layer
AssigneeWestern Digital (Fremont), LLC
InventorsHai Jiang, Kyusik Sin, Yingjian Chen
Life of this patent
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Abstract
A magnetic write head includes a seed layer and a magnetic layer on the seed layer. The seed layer includes seed-layer grains having either a face-centered cubic (fcc) crystalline structure with a surface plane substantially oriented in a [111] direction or a hexagonal-close-packed (hcp) crystalline structure with a surface plane substantially oriented in a [0001] direction. The magnetic layer includes magnetic-layer grains having a body-centered-cubic (bcc) crystalline structure with a surface plane substantially oriented in a [110] direction.
Claims18
A magnetic write head comprising:
- a seed layer comprising seed-layer grains having either a face-centered cubic (fcc) crystalline structure with a surface plane substantially oriented in a [111] direction or a hexagonal-close-packed (hcp) crystalline structure with a surface plane substantially oriented in a [0001] direction;
- and
- a magnetic layer on the seed layer, the magnetic layer comprising magnetic-layer grains having a body-centered-cubic (bcc) crystalline structure with a surface plane substantially oriented in a [110] direction, wherein the seed-layer grains have an average in-plane seed-layer grain width and the magnetic-layer grains have an average in-plane magnetic-layer grain width smaller than the average in-plane seed-layer grain width.
A magnetic write head comprising:
- a seed layer comprising seed-layer grains having either a face-centered cubic (fcc) crystalline structure with a surface plane substantially oriented in a [111] direction or a hexagonal-close-packed (hcp) crystalline structure with a surface plane substantially oriented in a [0001] direction;
- and
- a magnetic layer on the seed layer, the magnetic layer comprising magnetic-layer grains having a body-centered-cubic (bcc) crystalline structure with a surface plane substantially oriented in a [110] direction, wherein the magnetic-layer grains have an in-plane grain orientation distribution which comprises approximately equal proportions of three crystallographic directions oriented approximately 120 degrees from one another.
Dependencies are inferred from the claim text.