MAGNETIC SENSOR HAVING CoFeBTa IN PINNED AND FREE LAYER STRUCTURES
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsZheng Gao, Yingfan Xu, Hua Ai Zeng
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Abstract
A magnetic read sensor having improved magnetic performance and robustness. The magnetic sensor includes a magnetic free layer and a magnetic pinned layer structure. The magnetic pinned layer structure includes first and second magnetic layers separated from one another by a non-magnetic coupling layer. The second magnetic layer of the magnetic pinned layer structure includes a layer of CoFeBTa, which prevents the diffusion of atoms and also promotes a desired BCC crystalline grain growth. The magnetic free layer structure can also include such a CoFeBTa layer for further prevention of atomic diffusion and further promotion of a desired BCC grain growth.
Claims22
A magnetic read sensor, comprising:
- a magnetic pinned layer structure including a first magnetic layer structure, a second magnetic layer structure and a non-magnetic coupling layer sandwiched between the first and second magnetic layer structures;
- a magnetic free layer structure;
- and
- a non-magnetic barrier layer sandwiched between the magnetic free layer structure and the magnetic pinned layer structure;
- wherein
- the second magnetic layer of the pinned layer structure includes a layer of CoFeBTa.
The magnetic sensor as in claim I wherein the layer of CoFeBTa has a concentration of (Co40Fe40B20)100-XTax where X is 4-10 atomic percent.
A magnetic read sensor, comprising:
- a magnetic pinned layer structure including first and second magnetic layer structures and a non-magnetic coupling layer sandwiched between the first and second magnetic layer structures;
- a magnetic free layer structure;
- and
- a non-magnetic barrier layer sandwiched between the magnetic free layer structure and the magnetic pinned layer structure;
- wherein
- the magnetic free layer structure includes a layer of CoFeBTa.
A magnetic read sensor, comprising:
- a magnetic pinned layer structure including first and second magnetic layer structures and a non-magnetic coupling layer sandwiched between the first and second magnetic layer structures;
- a magnetic free layer structure;
- and
- a non-magnetic barrier layer sandwiched between the magnetic free layer structure and the magnetic pinned layer structure;
- wherein
- at least one of the magnetic free layer structure and the second magnetic layer structure of the magnetic pinned layer structure includes a layer of CoFeXY, where X is Al or Si and Y is Hf, Zr, Nb or Mo.
A magnetic data recording system, comprising:
- a magnetic media;
- an actuator;
- a slider connected with the actuator for movement adjacent to a surface of the magnetic media;
- and
- a magnetic read sensor formed on the slider, the magnetic read sensor further comprising:
- a magnetic pinned layer structure including first and second magnetic layer structures and a non-magnetic coupling layer sandwiched between the first and second magnetic layer structures;
- a magnetic free layer structure;
- and
- a non-magnetic barrier layer sandwiched between the magnetic free layer structure and the magnetic pinned layer structure;
- wherein
- the second magnetic layer structure of the pinned layer structure includes a layer of CoFeBTa.
Dependencies are inferred from the claim text.