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US 8,427,925 B2Granted
HAMR NFT materials with improved thermal stability
AssigneeSeagate Technology LLC
InventorsTong Zhao, Michael Christopher Kautzky, William Albert Challener, Michael Allen Seigler
Life of this patent
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Abstract
A near field transducer includes gold and at least one dopant. The dopant can include at least one of: Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo. The dopant concentration may be in a range from 0.5% and 30%. The dopant can be a nanoparticle oxide of V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th, or a nitride of Ta, Al, Ti, Si, In, Fe, Zr, Cu, W or B.
Claims10
An apparatus comprising:
- a near field transducer comprising:
- gold;
- and
- at least one dopant selected from:
- Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, and Mo, wherein the dopant has a concentration from 0.5% to 30%.
2 more elements
An apparatus comprising:
- a near field transducer comprising gold;
- and
- a nanoparticle oxide or nitride dopant, wherein the dopant has a particle size from 1 to 5 nm.
An apparatus comprising:
- a near field transducer comprising gold;
- and
- a nanoparticle oxide or nitride dopant wherein the dopant comprises one of:
- V2O5, ZrO2, MgO, CaO, Al2O3, TiO2, SiO2, CeO2, Y2O3, Ta2O5, WO2, or ThO2.
1 more element
An apparatus comprising:
- a storage medium;
- a recording head comprising a near field transducer and a waveguide configured to direct light onto the near field transducer, wherein the near field transducer comprises:
- gold;
- and
- at least one dopant at a concentration of 0.5% to 30%, and selected from:
- Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo;
- and
- an arm for positioning the recording head adjacent to the storage medium.
5 more elements
An apparatus comprising:
- a storage medium;
- a recording head comprising a near field transducer and a waveguide configured to direct light onto the near field transducer, wherein the near field transducer comprises:
- gold;
- and
- a nanoparticle oxide or nitride dopant,
- wherein the dopant has a particle size from 1 to 5 nm.
3 more elements
An apparatus comprising:
- a storage medium;
- a recording head comprising a near field transducer and a waveguide configured to direct light onto the near field transducer, wherein the near field transducer comprises:
- gold;
- and
- a nanoparticle oxide or nitride dopant comprising one of:
- V2O5, ZrO2, MgO, CaO, Al2O3, TiO2, SiO2, CeO2, Y2O3, Ta2O5, WO2, or ThO2.
3 more elements
Dependencies are inferred from the claim text.