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1999 Fiscal Year Final Research Report Summary

Study of Ultra-High Debnsity Information Storage Materials

Research Project

Project/Area Number 09044186
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section一般
Research Field Electronic materials/Electric materials
Research InstitutionToyota Technological Institute

Principal Investigator

SUZUKI Takao  Toyota Technologicla Institute, Professor, 大学院・工学研究科, 教授 (70005495)

Co-Investigator(Kenkyū-buntansha) CHEKANOV Albert  Toyota Technological Institute, Postdoctoral Fellow, 大学院・工学研究科, ポストドクトラル研究員 (80308999)
ROBERT Sinclair  スタンフォード大学, 教授
ROBERT White  スタンフォード大学, 教授
LAUHOFF Georg  Toyota Technologicla Institute, Postdoctoral Fellow, 大学院・工学研究科, ポストドクトラル研究員 (70308998)
SHIBAA Rachid  Toyota Technological Institute, Postdoctoral Fellow, 大学院・工学研究科, ポストドクトラル研究員 (60319374)
SINCLAR robert  Stanford University, Professor
WHITE Robert  Stanford University, Professor
Project Period (FY) 1997 – 1999
KeywordsMagnetic recording / Magneto-optical recording / Adtivation volume / Magnetization instability / CoィイD23ィエD2Pt ordered alloy thin film / FeCo-Pt ordered alloy thin film / High magnetic anisotropy
Research Abstract

The present project is concerned with materials science of high density data storage, especially magnetic and magneto-optical recordings. The work is jointly collaborated with the group of Stanford University in the USA.
For furuter high density recording the controllability of nanoscale structure in a recording medium is essential. Also, further development of novel materials with high magnetic an isotropy must be made. The present work is forcused on the above issues. The followings may be summarized as the results.
1. An ordered CoィイD23ィエD2Pt alloy thin film is found to exhibit very high magnetic anisotropy 3x10ィイD17ィエD1 erg/cc at room temperature. This finding is the first to be reported.
2. An ordered CoィイD23ィエD2Pt alloy thin film is found to exhibit very high magnetic anisotropy 3 ×10ィイD17ィエD1 erg/cc at room temperature. This finding is the first to be reported.
3. The thermal stability of magnetic recording media CoCrPtTa strongly depends on activation volume. The activation volume is dependent on magnetic field. decreasing with filed and then increases at fields beyond coercivity. This result implies that the dispersion of magnetic anisotropy of grains is predominant.
4. The noise of recording performance of the above media increases with activation on volume.
5. The field dependence of amorphous TbFeCo films which are being used for magneto-optical recording is very much different from that for magnetic recording media. This implies that the thermal relaxation mechanism in amorphous films is governed by a single energy potential value, as compared to the case of magnetic recording media.

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] R.Sbiaa and T.Suzuki: "Micromagnetic Study of Readout Process in Magetooptical Multilayers"to be published in J.Appl.Phys..

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Itoh and T.Suzuki: "Magnetic and Magneto-optical Properties in TbFeCo/(Pt,Pd) Multilayers"to be published in J.Appl.Phys..

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] E.Stavrou, R.Sbiaa, T.Suzuki, S.Knappmann and K.Roll: "Magnetic Anisotropy and Spin Reorientation Effects in Gd/Fe and Gd/(FeCo) Multilayers for High Density Magneto-optical Recording"to be published in J.Appl.Phys..

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] E.Stavrou, R.Sbiaa, T.Suzuki and K.Roell: "Different Mechanisms of Spin Reorientation in Exchange Coupled Double RE-TM Layers with In-plane and Perpendicular Magnetic Anisotropy"to be published in J.Appl.Phys..

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] B.R.Acharya and T.Suzuki: "Activation Volume and Correlation to Media Noise in High-density Longitudinal Recording Media"IEEET rans.Magn.. Vol.35 No.5. 2652-2654 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Chakanov, M.Birukawa, Y.Itoh and T.Suzuki: "A High Numerical Aperture Solid Immersion Lens Magneto-Optical Recoring System"IEEE Trans.Magn.. Vol.35 No.5. 3100-3105 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Itoh and T.Suzuki: "Magnetic and Magneto-Optical Properties Through Polarized Pt and Pd in TbFeCo/(Pt,Pd) Multilayers"IEEE Trans.Magn.. Vol.35 No.5. 3121-3123 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Yamada, T.Suzuki, G.Lauhoff and H.Kanazawa: "The Origin of Perpendicular Magnetic Anisotropy Observed in Co3Pt Alloy Thin Films"IEEE Trans.Magn.. Vol.35 No.5. 2988-2990 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Shiaa and T.Suzuki: "Micromagnetic Study of Readout Process in Magetooptical Mutilayers"J.Appl.Phys.. (to be published). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Itoh and T.Suzuki: "Magnetic and Magneto-optical Properties in TbFeCo/(Pt,Pd) Multilayers"J.Appl.Phys.. (to be published). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] E.Stavrou, R.Sbiaa, T.Suzuki S.Knappmann and K.Roll: "Magnetic Anisotropy and Spin Reorientation Effects in Gd/Fe and Gd/(FeCo) Multilayers for High Density Magneto-optical Recording"J.Appl.Phys.. (to be published). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] E.Stavrou, R.Sbiaa, T.Suzuki and K.Roell: "Different Mechanisms of Spin Reorientation in Exchange Couple Double RE-TM Layers with In-plane and Perpendicular Magnetic Anisotropy"J.Appl.Phys.. (to be published). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] B.R.Acharya and T.Suzuki: "Activation Volume and Correlation to Media Noise in High-density Longitudinal Recording Media"IEEE Trans.Magn.. Vol.35,No.5. 2652-2654 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Chakanov, M.Birukawa, Y.Itoh and T.Suzuki: "A High Numerical Aperture Solid Immersion Lens Magneto-Optical Recording System"IEEE Trans.Magn.. Vol.35,No.5. 3100-3105 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] G.Lauhoff, C.A.F.Vaz and J.A.C.Bland, Jaeyoung Lee and T.Suzuki: "Magneto-elastic and Interface Anisotropy of Epitaxial Cu/Ni/Cu(001) sandwiches"IEEE Trans.Magn.. Vol.35,No.5. 2973-2975 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Itoh and T.Suzuki: "Magnetic and Magneto-Optical Properties Through Polarized Pt and Pd in TbFeCo/(Pt,Pd) Multilayers"IEEE Trans. Magn.. Vol.35,No.5. 3121-3123 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Yamada, T.Suzuki, G.L.Lauhoff and H.Kanazawa: "Origin of Perpendicular Magnetic Anisotropy Observed in CoィイD23ィエD2Pt Alloy Thin Films"IEEE Trans. Magn.. Vol. 35,No.5. 2988-2990 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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