Nanometer scale magnetization
View Patent ↗Magnetic heads for perpendicular magnetic recording on magnetic recording media are provided.
1. A magnetic head for perpendicular magnetic recording on a magnetic recording medium, the magnetic head comprising:
a first nanometer scale transformer comprising:
a first circuit component that forms at least part of a first substantially ring-shaped structure having a first radius and a first width;
a second circuit component that forms at least part of a second substantially ring-shaped structure having a second radius different than the first radius and a second width different than the first width; and
a coupling area configured for magnetic induction coupling between the first circuit component and the second circuit component.
2. The magnetic head of claim 1 , wherein the first substantially ring-shaped structure of the first circuit component has approximately a 300 nm radius and approximately a 100 nm width, or has approximately a 700 nm radius and approximately a 200 nm width.
3. The magnetic head of claim 1 , wherein the second substantially ring-shaped structure for the second circuit component has approximately a 700 nm radius and approximately a 200 nm width, or has approximately a 1400 nm radius and approximately a 500 nm width.
4. The magnetic head of claim 1 , wherein the substantially ring-shaped structures for the first and the second circuit components are substantially concentric.
5. The magnetic head of claim 1 , wherein the coupling area is inside one of the substantially ring-shaped structures of the first or the second circuit components.
6. The magnetic head of claim 1 , wherein the substantially ring-shaped structures of the first and the second circuit components are comprised of metal and a terminal pair configured to receive a DC current is connected to an outer substantially ring-shaped structure of the first and second substantially ring-shaped structures.
7. The magnetic head of claim 1 , further comprising a first terminal pair connected to the first circuit component and/or a second terminal pair connected to the second circuit component.
8. The magnetic head of claim 7 , further comprising an amplifier connected to one of the first and second terminal pairs.
9. The magnetic head of claim 1 , further comprising a first and second terminal pair fabricated on a substrate with wires and terminated with a contact pad.
10. A magnetic head for perpendicular magnetic recording on a magnetic recording medium, the magnetic head comprising:
a first nanometer scale transformer comprising:
a first circuit;
a second circuit;
a coupling area configured for magnetic induction coupling between the first circuit and the second circuit; and
an insulative substrate, wherein the first and the second circuits and the coupling area are fabricated on the substrate.
11. The magnetic head of claim 10 , wherein the first and the second circuits are made of metals comprising Ti, Au, or combination thereof.
12. The magnetic head of claim 10 , wherein each of the first and the second circuits are substantially ring-shaped structures, and each of the substantially ring-shaped structures has a different radius and width.
13. The magnetic head of claim 12 , wherein the substantially ring-shaped structures for the first and the second circuits are substantially concentric.
14. The magnetic head of claim 12 , wherein the coupling area is inside one of the substantially ring-shaped structures of the first and the second circuits.
15. The magnetic head of claim 10 , wherein each of the first and the second circuits is substantially in the shape of one of: an oval, a triangle, a rectangle, a polygon or a square.
16. The magnetic head of claim 10 , further comprising a first terminal pair connected to the first circuit and/or a second terminal pair connected to the second circuit.
17. The magnetic head of claim 10 , further comprising a first and second terminal pair fabricated on the substrate with wires and terminated with a contact pad.
18. The magnetic head of claim 10 , wherein the insulative substrate comprises SiO 2 .
19. A magnetic head for perpendicular magnetic recording on a magnetic recording medium, the magnetic head comprising:
a first nanometer scale transformer comprising:
a first circuit component that forms at least part of a first substantially ring-shaped structure having a first radius and a first width;
a second circuit component that forms at least part of a second substantially ring-shaped structure having a second radius different than the first radius and a second width different than the first width;
a coupling area configured for magnetic induction coupling between the first circuit component and the second circuit component; and
a SiO 2 containing substrate, wherein the first and the second circuits and the coupling area are fabricated on the substrate.
20. The magnetic head of claim 19 , wherein the first substantially ring-shaped structure of the first circuit component has approximately a 300 nm radius and approximately a 100 nm width, or has approximately a 700 nm radius and approximately a 200 nm width and wherein the second substantially ring-shaped structure for the second circuit component has approximately a 700 nm radius and approximately a 200 nm width, or has approximately a 1400 nm radius and approximately a 500 nm width.