Energy-assisted magnetic-recording head having a magnetic-recording assistance element disposed to lower magnetic-recording field for reversing magnetization in a magnetic-recording disk
View Patent ↗A head-slider configured to fly in proximity to a recording surface of a magnetic-recording disk. The head-slider includes a write element including a main pole configured to generate a magnetic-recording field from a pole tip of the main pole in a first localized portion of the magnetic-recording disk. The head-slider also includes a magnetic-recording assistance element configured to provide energy to a second localized portion of the magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of the magnetic-recording disk. A width of the pole tip of the main pole on a leading-edge side is wider than a width of the pole tip of the main pole on a trailing-edge side.
1. A head-slider configured to fly in proximity to a recording surface of a magnetic-recording disk, said head-slider comprising:
a write element comprising a main pole configured to generate a magnetic-recording field from a pole tip of said main pole in a first localized portion of said magnetic-recording disk; and
a magnetic-recording assistance element configured to provide energy to a second localized portion of said magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of said magnetic-recording disk;
wherein a width of said pole tip of said main pole on a leading-edge side is wider than a width of said pole tip of said main pole on a trailing-edge side; and
wherein an end face of said magnetic-recording assistance element is disposed at said trailing-edge side of said pole tip of said main pole.
2. The head-slider of claim 1 , wherein said width of said pole tip of Said main pole widens from said trailing-edge side to said leading-edge side.
3. The head-slider of claim 1 , wherein a width of said end face of said magnetic-recording assistance element is narrower than said width of said pole tip of said main pole.
4. The head-slider of claim 1 , wherein said magnetic-recording assistance element is configured to emit near-field light from said end face of said magnetic-recording assistance element.
5. The head-slider of claim 4 , wherein said magnetic-recording assistance element comprises a scatterer made of a metal.
6. The head-slider of claim 1 , wherein said magnetic-recording assistance element is configured to emit a high frequency magnetic field from said end face of said magnetic-recording assistance element.
7. The head-slider of claim 1 , further comprising:
a magnetic shield portion disposed at least on both sides of said main pole in a cross track direction.
8. The head-slider of claim 1 , wherein a greatest width of said pole tip of said main pole is greater than a width of a data track written on said magnetic-recording disk.
9. A head-arm assembly, comprising:
a head-slider, said head-slider comprising:
a write element comprising a main pole configured to generate a magnetic-recording field from a pole tip of said main pole in a first localized portion of said magnetic-recording disk; and
a magnetic-recording assistance element configured to provide energy to a second localized portion of said magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of said magnetic-recording disk;
wherein a width of said pole tip of said main pole on a leading-edge side is wider than a width of said pole tip of said main pole on a trailing-edge side; and
wherein an end face of said magnetic-recording assistance element is disposed at said trailing-edge side of said pole tip of said main pole.
10. The head-arm assembly of claim 9 , wherein said width of said pole tip of said main pole widens from said trailing-edge side to said leading-edge side.
11. The head-arm assembly of claim 9 , wherein a width of said end face of said magnetic-recording assistance element is narrower than said width of said pole tip of said main pole.
12. The head-arm assembly of claim 9 , wherein said magnetic-recording assistance element is configured to emit near-field light from said end face of said magnetic-recording assistance element.
13. The head-arm assembly of claim 12 , wherein said magnetic-recording assistance element comprises a scatterer made of a metal.
14. The head-arm assembly of claim 9 , wherein said magnetic-recording assistance element is configured to emit a high frequency magnetic field from said end face of said magnetic-recording assistance element.
15. The head-arm assembly of claim 9 , further comprising:
a magnetic shield portion disposed at least on both sides of said main pole in a cross track direction.
16. A hard-disk drive, comprising:
a head arm assembly, said head-arm assembly, comprising:
a head-slider, said head-slider comprising:
a write element comprising a main pole configured to generate a magnetic-recording field from a pole tip of said main pole in a first localized portion of said magnetic-recording disk; and
a magnetic-recording assistance element configured to provide energy to a second localized portion of said magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of said magnetic-recording disk;
wherein a width of said pole tip of said main pole on a leading-edge side is wider than a width of said pole tip of said main pole on a trailing-edge side; and
wherein an end face of said magnetic-recording assistance element is disposed at said trailing-edge side of said pole tip of said main pole.