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Perpendicular Magnetic Recording Medium for a Density Beyond 1 Tera Bit/inch2

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Electrochemical Nanotechnologies

Part of the book series: Nanostructure Science and Technology ((NST))

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Abstract

Perpendicular magnetic recording was proposed by Professor S. Iwasaki in 1977 [1] as a scheme superior to that of longitudinal recording in terms of high density recording performances. The new HDD (hard disk drive) system of perpendicular recording was commercialized in 2005. The area recording density started at 133 Gbit/inch2 [2], which far surpassed the achieved density of the conventional HDD of longitudinal recording. In 2006, successful demonstrations of the highest density at around 350–420 Gbit/inch2 were announced, one after another, by HDD manufacturers [3]; no other new information storage technology superior to magnetic recording has been proposed as yet. Thus, perpendicular recording is expected to dominate over the existing information storage technology in the near future.

Perpendicular magnetic recording (PMR) has the great advantages of a single pole high writeability of recording in the gap between the head and the medium soft under layer, a high recording resolution of anti-parallel magnetization transition with no demagnetizing field, and a high thermal stability with a rather thick recording layer, when compared with the longitudinal magnetic recording (LMR) used so far . These advantages in PMR and the lately diagnosed limitation of thermal stability of the LMR media accelerated the commercialization of PMR at around a density of over 100 Gbits/inch2,where the PMR media have a large-enough margin for the limit of thermal stability. Construction of the commercialized PMR system is based on the original principle of PMR, in which the combination of a single pole head and a composite medium with a soft magnetic back layer was essential. Presumably, however, as long as granular type media are used, even the PMR system would face thermal instability of the media or the restriction of writing by single pole heads when a high density over 1 Tera bits/inch2 is designed. The former issue can be answered by employing very high anisotropy energy materials such as Fe–Pt, Sm–Co, Fe–Nd–B, etc. But it means an extremely high switching field of such media; thus, the latter issue of head writeability would, in the final outcome, become very serious.

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References

  1. Iwasaki S, Nakamura Y (1997) An analysis of the magnetization mode for high density magnetic recording. IEEE Trans Magn 13:1272–1277

    Article  Google Scholar 

  2. Press Release (Dec. 14, 2004) Toshba 133G

    Google Scholar 

  3. Press Release (Aug. 2006) Web 300G-420G

    Google Scholar 

  4. Rottmayer RE et al (2006) Heat assisted magnetic recording. IEEE Trans Magn 42:2417–2421

    Article  Google Scholar 

  5. Lambert SE et al (1987) Recording characteristics of submicron discrete magnetic tracks. IEEE Trans Magn MAG-23(5):3690–3692

    Article  Google Scholar 

  6. Press Release (Oct. 03, 2006) TDK

    Google Scholar 

  7. Soeno Y et al (2005) Performance evaluation of discrete track perpendicular media for high recording density. IEEE Trans Magn 41:3220–3222

    Article  Google Scholar 

  8. Greaves S, Kanai Y, Muraoka H (2006) Trailing shield head recording in discrete track media. IEEE Trans Magn 42:2408–2410

    Article  Google Scholar 

  9. Nakatani I et al (1991) Japan patent 1888363, publication JP03-022211A

    Google Scholar 

  10. Chou SY et al (1994) Single-domain magnetic pillar array of 35 nm diameter and 65 Gbits/in.2 density for ultrahigh density quantum magnetic storage. J Appl Phys 76:6673–6675

    Article  CAS  Google Scholar 

  11. Nakamura Y (1994) A challenge to terabit perpendicular spinic storage. J Magn Soc Jpn 18(S1):161–170

    Google Scholar 

  12. White Robert L et al (1997) Patterned media: a viable route to 50 Gbits/in2 and up for magnetic recording? IEEE Trans Magn 33:990–995

    Article  Google Scholar 

  13. Charp SH, Lu P, He Y (1997) Thermal stability of recorded information at high densities. IEEE Trans Magn 33:978–983

    Article  Google Scholar 

  14. Terris BD et al (1999) Ion-beam patterning of magnetic films using stencil masks. Appl Phys Lett 75:403–405

    Article  CAS  Google Scholar 

  15. Ross CA et al (1999) Fabrication of patterned media for high density magnetic storage. J Vac Sci Technol B 17:3168–3176

    Article  CAS  Google Scholar 

  16. Rottner CT, Best ME, Terris BD (2001) Patterniing of granular magnetic media with a focuses ion beam to produce single-domain islands at >140 Gbits/in2. IEEE Trans Magn 37:1649–1651

    Article  Google Scholar 

  17. Aoyama T, Sato I, Ishio S (2003) Fabrication and magnetic properties of patterned magnetic recording media. Oyo Butsuri 72:298–302

    CAS  Google Scholar 

  18. Hughes GF (2000) Patterned media write designs. IEEE Trans Magn 36:521–526

    Article  Google Scholar 

  19. Kondo Y et al (2006) Magnetic properties of magnetic dot arrays with a soft magnetic underlayer. J Magn Soc Jpn 30:112–115

    Article  CAS  Google Scholar 

  20. Sun S et al (2000) Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices. Science 287:1989–1992

    Article  CAS  Google Scholar 

  21. Wang S et al (2003) Magnetic properties of self-organized L10 FePtAg nanoparticle arrays. J Magn Magn Mater 266:49–56

    Article  CAS  Google Scholar 

  22. Gapin AI et al (2006) CoPt patterned media in anodized aluminum oxide templates. J Appl Phys 99:08G902

    Article  Google Scholar 

  23. Arai K, Ohoka Y, Wakui Y (1988) Preparation and magnetic properties of anodic oxide magnetic films. IEICE Trans Electron J71-C:994–1000

    Google Scholar 

  24. Kawaji J et al (2005) Area selective formation of magnetic nanodot arrays on Si wafer by electroless deposition. J Magn Magn Mater 287:245–249

    Article  CAS  Google Scholar 

  25. Huang YH et al (2002) CoPt and FePt nanowires by electrodeposition. J Appl Phys 91:6869–6871

    Article  CAS  Google Scholar 

  26. Nutter PW et al (2005) Effect of island distribution on error rate performance in patterned media. IEEE Trans Magn 41:3214–3216

    Article  Google Scholar 

  27. Honda N et al (2002) Role of M–H loop slope of media for recording properties in perpendicular magnetic recording. IEEE Trans Magn 38:2030–2032

    Article  CAS  Google Scholar 

  28. Honda N, Ouchi K, Iwasaki S (2002) Design consideration of ultrahigh–density perpendicular magnetic recording media. IEEE Trans Magn 38:1615–1621

    Article  CAS  Google Scholar 

  29. Sharrock MP (1990) Time-dependent magnetic phenomena and particle-size effects in recording media. IEEE Trans Magn 26:193–197

    Article  Google Scholar 

  30. Victora RH, Shen X (2005) Composite media for perpendicular magnetic recording. IEEE Trans Magn 41:537–542

    Article  Google Scholar 

  31. Takahashi S et al (2005) Magnetic recording head for patterned medium with 1 Tbit/inch2. Abs int’l symp. creation of magnetic recording materials with nano-interfacial technologies, Waseda University, Tokyo, PS08:27

    Google Scholar 

  32. Suzuki T, Honda N, Ouchi K (1997) Preparation on magnetic properties of sputter-deposited Fe–Pt thin films with perpendicular anisotropy. J Magn Soc Jpn 21-S2:177–180

    Google Scholar 

  33. Shimatsu T et al (2004) High perpendicular magnetic anisotropy of CoPtCr/Ru films for granular-type perpendicular media. IEEE Trans Magn 40:2483–2485

    Article  CAS  Google Scholar 

  34. Honda N (2005) Design of patterned media for 1 Tbit/in2 recording.Tech Rep IEICE MR2005-15:51–56

    Google Scholar 

  35. Stoner EC, Wohlfarth EP (1948) A mechanism of magnetic hysteresis in heterogeneous alloys. Phil Trans Roy Soc 240:599–644

    Article  Google Scholar 

  36. Takahashi S, Yamakawa K, Ouchi K (2003) Design of multisurface single pole head for high-density recording. J App Phy 93:6546–6548

    Article  CAS  Google Scholar 

  37. Suzuki T et al (2003) Design and recording properties of Fe–Pt perpendicular media. IEEE Trans Magn 39:691–696

    Article  CAS  Google Scholar 

  38. Kondo Y et al (2006) Magnetic properties of magnetic dot arrays with a soft magnetic underlayer. J Magn Soc Jpn 30:112–115

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Akita Research Institute of Advanced Technology (AIT), 4-21 Sanuki, Araya, Akita, 010-1623, Japan

    Kazuhiro Ouchi & Naoki Honda

  2. Faculty of Engineering, Tohoku Institute of Technology, 35-1 Yagiyama, Kasumicho, Taihakuku, Sendai, Miyagi, 982-8577, Japan

    Naoki Honda

Authors
  1. Kazuhiro Ouchi
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  2. Naoki Honda
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Correspondence to Kazuhiro Ouchi .

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Editors and Affiliations

  1. Fac. Science & Engineering, Waseda University, Okubo 3-4-1, Tokyo, 169-8555, Japan

    Tetsuya Osaka

  2. Emerson Network Power, Cooligy Precision Cooling, Maude Avenue 800, Mountain View, 94043, USA

    Madhav Datta

  3. Fac. Engineering, Tel Aviv University, Tel Aviv, 69978, Israel

    Yosi Shacham-Diamand

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Ouchi, K., Honda, N. (2010). Perpendicular Magnetic Recording Medium for a Density Beyond 1 Tera Bit/inch2 . In: Osaka, T., Datta, M., Shacham-Diamand, Y. (eds) Electrochemical Nanotechnologies. Nanostructure Science and Technology. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-1424-8_9

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