Method and system for providing a high moment film
View Patent ↗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.
1. 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 Fe X Co Y N Z , 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.
2. The high moment film of claim 1 wherein the hard axis coercivity of the at least one soft magnetic layer is not more than five Oersteds.
3. The high moment film of claim 1 wherein the plurality of high moment layers includes greater than two high moment layers.
4. 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 Fe X Co Y N Z , 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.
5. The magnetic transducer of claim 4 wherein the hard axis coercivity of the at least one soft magnetic layer is not more than five Oersteds.
6. The magnetic transducer of claim 4 wherein the plurality of high moment layers includes not more than sixteen high moment layers.
7. The magnetic transducer of claim 4 wherein the total thickness is at least two thousand Angstroms.
8. The magnetic transducer of claim 7 wherein the total thickness is not more than three thousand Angstroms.
9. The magnetic transducer of claim 4 wherein the at least one soft magnetic layer has a thickness of at least ten and not more than fifty Angstroms and each of the plurality of high moment layers has a thickness of at least one hundred and not more than one thousand Angstroms.
10. The magnetic transducer of claim 9 wherein the at least one soft magnetic layer has a thickness of at least thirteen Angstroms and not more than seventeen Angstroms and each of the plurality of high moment layers has a thickness of at least three hundred fifty Angstroms and not more than four hundred fifty Angstroms.
11. The magnetic transducer of claim 4 wherein the plurality of high moment layers includes greater than two high moment layers.
12. 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 Fe X Co Y N Z , 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.
13. The disk drive of claim 12 wherein the plurality of high moment layers includes greater than two high moment layers.
14. 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 Fe X Co Y N Z , 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.
15. The method of claim 14 wherein the hard axis coercivity of the at least one soft magnetic layer is not more than five Oersteds.
16. The method of claim 14 wherein the step of providing the pole further includes:
providing not more than sixteen high moment layers.
17. The method of claim 14 wherein the total thickness is at least two thousand Angstroms.
18. The method of claim 17 wherein the total thickness is not more than three thousand Angstroms.
19. The method of claim 14 wherein each of the at least one soft magnetic layer has a thickness of at least ten and not more than fifty Angstroms and each of the plurality of high moment layers has a thickness of at least one hundred and not more than one thousand Angstroms.
20. The method of claim 19 wherein the step of providing the pole further includes:
providing each of the at least one soft magnetic layer with a thickness of at least thirteen Angstroms and not more than seventeen Angstroms; and
providing each of the plurality of high moment layers with a thickness of at least three hundred fifty Angstroms and not more than four hundred fifty Angstroms.
21. The method of claim 14 wherein the plurality of high moment layers includes greater than two high moment layers.