Method and system for providing a high moment film
AssigneeWestern Digital (Fremont), LLC
InventorsYunjun Tang, Yun-Fei Li, Yingjian Chen
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Abstract
A method and system for providing a high moment film are disclosed. The high moment film might be used in structures, such as a pole, of a magnetic transducer. The method and system includes providing a plurality of high moment layers and at least one soft magnetic layer interleaved with and ferromagnetically coupled with the plurality of high moment layers. Each of the plurality of high moment layers has a magnetic moment of greater than 2.4 Tesla. The at least one soft magnetic layer has a hard axis coercivity of not more than twenty Oersted. The high moment film has a total thickness of at least one thousand Angstroms.
Claims21
A high moment film comprising:
- a plurality of high moment layers, each of the plurality of high moment layers having a magnetic moment of greater than 2.4 Tesla and including FeXCoYNZ, where X+Y+Z=100 and X is greater than or equal to twenty, Y is less than or equal to eighty, and Z is greater than zero;
- and
- at least one soft magnetic layer interleaved with and ferromagnetically coupled with the plurality of high moment layers, the at least one soft magnetic layer having a hard axis coercivity of not more than twenty Oersteds, each of the at least one soft magnetic layer including at least one of FeCoB, FeCoZr and FeCoNb;
- wherein the high moment film has a total thickness of at least one thousand Angstroms.
A magnetic transducer comprising:
- a pole having a high moment film including a plurality of high moment layers and at least one soft magnetic layer interleaved with and ferromagnetically coupled with the plurality of high moment layers, each of the plurality of the high moment layers having a magnetic moment of greater than 2.4 Tesla and including FeXCoYNZ, where X+Y+Z=100 and X is greater than or equal to twenty, Y is less than or equal to eighty, and Z is greater than zero, the at least one soft magnetic layer having a hard axis coercivity of not more than twenty Oersted, the high moment film having a total thickness of at least one thousand Angstroms, each of the at least one soft magnetic layer including at least one of FeCoB, FeCoZr and FeCoNb;
- and
- a coil for energizing the pole.
A disk drive comprising:
- a slider;
- a magnetic transducer coupled with the slider, the magnetic transducer including a pole and a coil for energizing the pole, the pole having a high moment film including a plurality of high moment layers and at least one soft magnetic layer interleaved with and ferromagnetically coupled with the plurality of high moment layers, each of the plurality of high moment layers having a magnetic moment of at least 2.4 Tesla and including FeXCoYNZ, where X+Y+Z=100 and X is greater than or equal to twenty, Y is less than or equal to eighty, and Z is greater than zero, each of the at least one soft magnetic layer having a hard axis coercivity of not more than twenty Oersted, the high moment film having a total thickness of greater than one thousand Angstroms, each of the at least one soft magnetic layer including at least one of FeCoB, FeCoZr and FeCoNb.
A method for fabricating a magnetic transducer having an air-bearing surface (ABS) comprising:
- providing a pole having a high moment film including a plurality of high moment layer and at least one soft magnetic layer interleaved with and ferromagnetically coupled with the plurality of high moment layers, each of the plurality of high moment layers having a magnetic moment of greater than 2.4 Tesla and including FeXCoYNZ, where X+Y+Z=100 and X is greater than or equal to twenty, Y is less than or equal to eighty, and Z is greater than zero, each of the at least one soft magnetic layer having a hard axis coercivity of not more than twenty Oersted, the high moment film having a total thickness of at least one thousand Angstroms, each of the at least one soft magnetic layer including at least one of FeCoB, FeCoZr and FeCoNb;
- and
- providing a coil for energizing the pole.
Dependencies are inferred from the claim text.