Magnetic recording media having self organized magnetic arrays
A magnetic recording disc is provided according to the present invention for magnetic recording. The magnetic recording disc includes a disc substrate having a locking pattern etched therein. Chemically synthesized iron-platinum particles are provided in the locking pattern and completely fill the locking pattern. The chemically synthesized iron-platinum nanoparticles exhibit short-range order characteristics forming self organized magnetic arrays.
1. A magnetic recording disc for magnetic recording comprising:
a disc substrate having a locking pattern formed therein, the locking pattern comprising a plurality of pits formed in the disc substrate; and
a plurality of nanoparticles completely filling the plurality of pits and exhibiting short-range order characteristics, wherein each individual pit includes a plurality of nanoparticles therein,
said plurality of nanoparticles consisting of a single magnetic species.
2. The magnetic recording disc of claim 1 , wherein the nanoparticles comprise chemically synthesized nanoparticles having a grain size of 3–10 nm.
3. The magnetic recording disc of claim 2 , wherein the chemically synthesized nanoparticles comprise FePt, CoPt, FePd or MnAl nanoparticles.
4. The magnetic recording disc of claim 1 , wherein the disc substrate comprises glass, quartz, Si, SiO 2 , ceramic or AlMg.
5. The magnetic recording disc of claim 1 , wherein the plurality of pits formed in the disc substrate include a pit depth of 5–20 nm.
6. The magnetic recording disc of claim 1 , wherein the nanoparticles include a self-assembly-coherence length scale of 100–1000 nm.
7. The magnetic recording disc of claim 1 , further comprising a protective coating layer covering the disc substrate and the nanoparticles.
8. The magnetic recording disc of claim 1 , wherein the locking pattern is formed in accordance with a self-assembly-coherence length scale of the plurality of nanoparticles.
9. A data storage medium for magnetic recording comprising:
a substrate having a locking pattern formed therein, the locking pattern comprising a plurality of pits formed in the substrate; and
a plurality of nanoparticles completely filling the plurality of pits and exhibiting short-range order characteristics, wherein each individual pit includes a plurality of nanoparticles therein,
said plurality of nanoparticles consisting of a single magnetic species.
10. The data storage medium of claim 9 , wherein the nanoparticles comprise chemically synthesized nanoparticles having a grain size of 3–10 nm.
11. The data storage medium of claim 10 , wherein the chemically synthesized nanoparticles comprise FePt, CoPt, FePd or MnAl nanoparticles.
12. The data storage medium of claim 9 , wherein the substrate comprises glass, quartz, Si, SiO 2 , ceramic or AlMg.
13. The data storage medium of claim 9 , wherein the plurality of pits formed in the substrate include a pit depth of 5–20 nm.
14. The data storage medium of claim 9 , wherein the nanoparticles include a self-assembly-coherence length scale of 100–1000 nm.
15. The data storage medium of claim 9 , wherein the locking pattern is formed in accordance with a self-assembly-coherence length scale of the plurality of nanoparticles.