Extremely high density magnetic recording media, with production methodology controlled longitudinal/perpendicular orientation, grain size and coercivity

A system comprising a plurality of sequentially alternating,

• FePt and/or Fe/Pt;
• and Oxide;
• layers on a surface of a substrate, said system being characterized by an X-ray diffraction pattern wherein a (111) peak has a magnitude between substantially absent and less than half the magnitude of the larger of present (001) and (002) peaks;
• said system being a magnetic media suitable for use in extremely high density recording systems and the result of the fabrication procedure comprising, in any functional order, the steps of:
• a. providing a substrate;
• b. providing a vacuum deposition system comprising sources of FePt and/or Fe & Pt and an oxide;
• c. placing said substrate into said vacuum deposition system;
• d. depositing a plurality of sequentially alternating layers, in an order selected from the group consisting of:
• FePt and/or Fe/Pt-oxide;
• and
• Oxide-FePt and/or Fe/Pt;
• onto said substrate;
• and
• e. annealing said substrate onto which has been vacuum deposited a plurality of sequentially alternating layers of:
• FePt and/or Fe/Pt;
• and oxide;
• at a temperature and time combination sufficient to result in a system characterized by an X-ray diffraction pattern wherein a (111) peak has a magnitude between substantially absent and less than half the magnitude of the larger of present (001) and (002) peaks.

A system comprising a plurality of sequentially alternating,

• FePt and/or Fe/Pt;
• and Oxide;
• layers on a surface of a substrate, said system being characterized by an X-ray diffraction pattern including significant (110) and (220) peaks and essentially negligible (111), (001) and (002) peaks, the magnitudes of which are less than half the larger of the magnitude of the (110) and (220) peaks;
• said system being a magnetic media suitable for use in extremely high density recording systems.

A system comprising a plurality of sequentially alternating,

• FePt and/or Fe/Pt;
• and Oxide;
• layers on a surface of a substrate, said system being characterized by an X-ray diffraction pattern including significant (110) and (220) peaks and essentially negligible (111), (001) and (002) peaks, the magnitudes of which are less than half the magnitude of the larger of the (110) and (220) peaks;
• said system being a magnetic media suitable for use in extremely high density recording systems and the result of the fabrication procedure comprising, in any functional order, the steps of:
• a. providing a substrate;
• b. providing a vacuum deposition system comprising sources of FePt and/or Fe & Pt and an oxide;
• c. placing said substrate into said vacuum deposition system;
• d. depositing a plurality of sequentially alternating layers, in an order selected from the group consisting of:
• FePt and/or Fe/Pt-Oxide;
• and Oxide-FePt and/or Fe/Pt;
• onto said substrate;
• and
• e. annealing said substrate onto which has been vacuum deposited a plurality of sequentially alternating layers of:
• FePt and/or Fe/Pt;
• and Oxide;
• at a temperature and time combination sufficient to result in a system characterized by an X-ray diffraction pattern including (110) and (220) peaks and essentially negligible (111), (001) and (002) peaks, the magnitudes of which are less than half the magnitude of the larger of the (110) and (220) peaks, after the anneal procedure.

A system comprising a plurality of sequentially alternating,

• FePt and/or Fe/Pt;
• and B2O3;
• layers on a surface of a substrate, said system being characterized by an X-ray diffraction pattern including significant (110) and (220) peaks and essentially negligible (111), (001) and (002) peaks, the magnitudes of which are less than half the larger of the magnitude of the (110) and (220) peaks;
• said system being a magnetic media suitable for use in extremely high density recording systems.

A system comprising a plurality of sequentially alternating,

• FePt and/or Fe/Pt;
• and B2O3;
• layers on a surface of a substrate, said system being characterized by an X-ray diffraction pattern including significant (110) and (220) peaks and essentially negligible (111), (001) and (002) peaks, the magnitudes of which are less than half the magnitude of the larger of the (110) and (220) peaks;
• said system being a magnetic media suitable for use in extremely high density recording systems and the result of the fabrication procedure comprising, in any functional order, the steps of:
• a. providing a substrate;
• b. providing a vacuum deposition system comprising sources of FePt and/or Fe & Pt and B2O3;
• c. placing said substrate into said vacuum deposition system;
• d. depositing a plurality of sequentially alternating layers, in an order selected from the group consisting of:
• FePt and/or Fe/Pt-B2O3;
• and
• B2O3-FePt and/or Fe/Pt;
• onto said substrate;
• and
• e. annealing said substrate onto which has been vacuum deposited a plurality of sequentially alternating layers of:
• FePt and/or Fe/Pt;
• and B2O3;
• at a temperature and time combination sufficient to result in a system characterized by an x-ray diffraction pattern including (110) and (220) peaks and essentially negligible (111), (001) and (002) peaks, the magnitudes of which are less than half the magnitude of the larger of the (110) and (220) peaks, after the anneal procedure.

A system presenting with coercivity of between six thousand (6,000) and twelve thousand (12,000) Oersteds, comprising a plurality of sequentially alternating,

• FePt and/or Fe/Pt;
• and B2O3;
• layers on a surface of a substrate, said system being characterized by an X-ray diffraction pattern wherein a (111) peak has a magnitude between substantially absent and less than half the magnitude of the larger of present (001) and (002) peaks;
• said system being a magnetic media suitable for use in extremely high density recording systems.

A system presenting with coercivity of between six thousand (6,000) and twelve thousand (12,000) Oersteds comprising a plurality of sequentially alternating,

• FePt and/or Fe/Pt;
• and B2O3;
• layers on a surface of a substrate, said system being characterized by an X-ray diffraction pattern wherein a (111) peak has a magnitude between substantially absent and less than half the magnitude of the larger of present (001) and (002) peaks;
• said system being a magnetic media suitable for use in extremely high density recording systems and the result of the fabrication procedure comprising, in any functional order, the steps of:
• a. providing a substrate;
• b. providing a vacuum deposition system comprising sources of FePt and/or Fe & Pt and an B2O3;
• c. placing said substrate into said vacuum deposition system;
• d. depositing a plurality of sequentially alternating layers, in an order selected from the group consisting of:
• FePt and/or Fe/Pt-B2O3;
• and
• B2O3-FePt and/or Fe/Pt;
• onto said substrate;
• and
• e. annealing said substrate onto which has been vacuum deposited a plurality of sequentially alternating layers of:
• FePt and/or Fe/Pt;
• and B2O3;
• at a temperature and time combination sufficient to result in a system characterized by an X-ray diffraction pattern wherein a (111) peak has a magnitude between substantially absent and less than half the magnitude of the larger of present (001) and (002) peaks.