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US 8,133,332 B2Granted
Method for preparing FePt media at low ordering temperature and fabrication of exchange coupled composite media and gradient anisotropy media for magnetic recording
AssigneeSeagate Technology LLC
InventorsJiaoming Qiu, Yonghua Chen, Ganping Ju
Life of this patent
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Abstract
A method includes: constructing a multilayer structure including a first layer of Pt, a first layer of A1 phase FePt on the first layer of Pt, and a second layer of Pt on the layer of FePt, and annealing the multilayer structure to convert the A1 phase FePt to L1o phase FePt.
Claims19
A method comprising:
- constructing a multilayer structure including a first layer of Pt, a first layer of A1 phase FePt on the first layer of Pt, and a second layer of Pt on the layer of FePt;
- annealing the multilayer structure to convert the A1 phase FePt to L1o phase FePt;
- removing the second layer of Pt;
- and
- depositing a layer of magnetically soft material on the L1o phase FePt.
2 more elements
A method comprising:
- constructing a multilayer structure including a first layer of Pt, a first layer of A1 phase FePt on the first layer of Pt, and a second layer of Pt on the layer of FePt;
- annealing the multilayer structure to convert the A1 phase FePt to L1o phase FePt;
- removing the second layer of Pt;
- depositing an exchange control layer on the L1o phase FePt;
- and
- depositing a layer of magnetically soft material on the exchange control layer.
3 more elements
Dependencies are inferred from the claim text.