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1997 Fiscal Year Final Research Report Summary

Preparation and Caracterization of Electrodeposited Magnetic Multilayrs

Research Project

Project/Area Number 08455323
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

HAYASHI Yasunori  Kyushu University, Faculty of Engineering, Professor, 工学部, 教授 (80010940)

Co-Investigator(Kenkyū-buntansha) JYOKO Yukimi  Kyushu University, Faculty of Engineering, Research Associate, 工学部, 助手 (40211974)
MASUDA Masataka  Kyushu University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40165725)
Project Period (FY) 1996 – 1997
KeywordsMetallic Artificial Superlattice / Electrodeposition / Magnetic Mutilayr / Giant Magnetoresistance / Perpendicular Magnetic Anisotropy
Research Abstract

Since the discovery of not only perpendicular magnetic anisotropy and magneto-optical Kerr effect but also giant magnetoresistance in metallic multilayrs, interest in magnetic multilayred nanostructures has been greatly stimulated. Most magnetic nanostructured films have been fabricated by sputtering or molecular beam epitaxy, which have proved to be the most suitable for the controlled preparation of high-quality structures on an atomic scale. In this work we reveal that electrodeposition will prove to be a promising candidate for the preparation of magnetic nanosructures, which depend on the deposition overpotential and hence the growth mechanism. Cross-sectional transmission electron microscopy, X-ray diffraction, energy dispersive X-ray analysis, and Auger electron spectoscopy have provided evidence for composition modulation across successive layrs in Co/Pt and Co/Cu nanometer-multilayred structures prepared by electrodeposition under potential control. Multilayred Co/Pt nanostructures grown on a Cu (111) substrate exhibit a remanent perpendicular magnetization and a large coercivity. Giant magnetoresistance and oscillatory antiferromagnetic interlayr coupling have been observed in a (111) fcc textured Co/Cu multilayred nanostructure. Moreover, a large saturation magnetoresistance of more than 20% has been achieved at room temperature for a heterogeneous Co-Cu alloy, which consists of ultrathin fcc Co-rich clusters in a nonmagnetic Cu matrix. This value is comparable to those previously reported in vapor-deposited superlattices as well as heterogeneous alloys. Further studies on the crystallization kinetics of nucleation and growth under precise overpotential control are necessary to achieve improved structural and magnetic qualities in the electrodeposited nanostructures.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] Yukimi Jyoko: "Characterization of Electrodeposited Co/Cu Ultrathin Films and Multilayers" J.Magn.Magn.Water.165・1. 280-283 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukimi Jyoko: "Preparation of Giant Magnetoresistance Co/Cu Multilayers by Electrodeposition" J.Electrochem Soc.144・1. L5-L8 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukimi Jyoko: "Preparation of Giant Magnetoresistance Co/Cu Heterogeneous Alloys by Electrodeposition" J.Electrochem.Soc.144・7. L193-L197 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yasunori Hayashi: "Preparation and Characterization of Electrodeposited Met allic Multilayers" Physica B, Condensed Matter. 239・1. 35-40 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Satoshi Kashiwabara: "Structure and Magnetic Properties of Electrodeposited Co/Pt Multilayers" Mater.Res.Soc.Symp.Proc.451. 407-412 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukimi Jyoko: "Growth,Structure and Characterization of Electrodeposited Co/Cu Ultrathin Films and Multilayers" Mater.Res.Soc.Symp.Proc.451. 87-92 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukimi Jyoko: "Structure and Characterization of Electrodeposited Metallic Multilayrs" J.Surf.Finish.Soc.Jpn. Vol.47 No.12. 1025-1028 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yukimi Jyoko: "Characterization of Electrodeposited Co/CU Ultrathin Films and Multilayrs" J.Magn.Magn.Mater.Vol.165 Nos.1-3. 280-283 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yukimi Jyoko: "Preparation of Giant Magnetoresistance Co/CU Multilayrs by Electrodeposition" J.Electrochem.Soc.Vol.144 No.1. L5-L8 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yukimi Jyoko: "Preparation of Giant Magnetoresistance Co-Cu Heterogeneous Alloys by Electrodeposition" J.Electrochem.Soc.Vol.144 No.7. L193-L195 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yasunori Hayashi: "Preparation and Characterization of Electrodeposited Metallic Multilayrs" Physica B,Condensed Matter. Vol.239 Nos.1-2. 35-40 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Satoshi Kashiwabara: "Structure and Magnetic Properties of Electrodeposited Metallic Multilayrs" Physica B,Condensed Matter. Vol.239 Nos.1-2. 47-49 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yukimi Jyoko: "Growth, Structure and Characterization of Electrodeposited Co/Cu Ultrathin Films and Multilayrs" Mater.Res.Soc.Symp.Proc.Vol.451. 87-92 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Satoshi Kashiwabara: "Structure and Magnetic Properties of Electrodeposited Cobalt/Platinum Multilayrs" Mater.Res.Soc.Symp.Proc.Vol.451. 407-412 (1997)

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

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Published: 1999-03-16  

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