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DEVELOPMENT OF A NEW ELECTROMECHANICAL TRANSDUCER USING SPIN VALVE ELEMENTS

Research Project

Project/Area Number 08455165
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 電子デバイス・機器工学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

HONDA Shigeo  HIROSHIMA UNIVERSITY,ENGINEERING,ASSOCIATE PROFEDSSOR, 工学部, 助教授 (00034405)

Co-Investigator(Kenkyū-buntansha) NAWATE Masahiko  SHIMANE UNIVERSITY,COOPERATIVE RESEARCH CENTER,ASSOCIATE PROFESSOR, 地域共同研究センター, 助教授 (10198400)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Keywordsantiferromagnetic MnPt film / FeCo free layr / soft magnetic Fe-SiO_2 / spin valve film / exchange field resistivity / resistivity / blocking temperature / thermal stability / FeCo / Cu / Co / NiFeCo / MnPt膜 / 巨大磁気抵抗効果 / ピン止め効果 / RKKY相互作用 / 三源同時スパッタ方式
Research Abstract

For application of spin valve elements to a new electromechanical transducer, basic investigations were carried out and the following results were obtained.
1. Large exchange interaciton fields. H_<ex> were obtained in MnPt/FeCo bilayrs.
i) In Cu/FeCo/MnPt films, the maximum H_<ex> appears for the MnPt film with Mn content of 51 at% after annealing. In this case, the resistivity and the blocking temperature of the Mn_<51>Pt_<49> films are about 255 muOMEGA cm and 300 - 370゚C,repectively.
ii) On annealing of FeCo/MnPt bilayrs, the CuAu-I type fct ordered MnPt crystals grow, causing the increase in H_<ex> above 230゚C and then reaching the maximum of 286 - 356 Oe at 320゚C.Above 350゚C,the value of H_<ex> decreases because of inter-diffusion at the layr boundaries, which was confirmed by RBS.In order to prevent the inter-diffusion, we deposited a thin Ag layr between FeCo and MnPt layrs, which brought an improvement in the thermal stability.
2. Spin valve films having high field-sensitivity and good thermal stability were obtained.
i) Thermal stability of FeCo (50*) /Cu(t_<Cu>) /FeCo (35*) /MnPt (300*) films : The film of t_<Cu> = 30* shows the maximum magnetoresistance (MR) ratio, 6.2%, after annealing at 290゚C.However, the value of MR ratio decreases during annealing for long time. On the other hand, the films of t_<Cu> >= 40* are stable up to 320゚C.
ii) Enhancement of the field sensitivity : Soft magnetic granular Fe-SiO_2 layr was deposited on the FeCo fre layr and the field sensitivity was increased.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (48 results)

All Other

All Publications (48 results)

  • [Publications] 本多 茂男: "Magnetic structure and perpendicular magnetic anisotropy of rare earth(Nd,Pr,Gd)/Fe multilayers" Journal of Applied Physics. 79. 365-372 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 縄手 雅彦: "Pseudo-granular giant magnetoresistance in NiFe/Ag multilayers" Journal of Magnetism and Mgnetic Materials. 156. 383-384 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 坂本 勲: "CEMS study of the magnetic properties of Au/Fe multilayers" Proceeding of ICAME-95. 635-638 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Giant magnetoresistance of perpendicular magnetic Co/Au multilayers" Journal of Applied Physics. 80. 5175-5182 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Tunneling giant magnetoresistance in Fe-SiO2 multilayered and alloyed films" Journal of Magnetism and Magnetic Materials. 165. 153-156 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 坂本 勲: "CEMS study of Au/Fe multilayers in annealing process" Journal of Magnetism and Magnetic Materials. 165. 208-211 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Size effect on giant magnetoresistance of Co-Ag films" Journal of Magnetism and Magnetic Materials. 165. 326-329 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Giant magnetoresistance and superparamagnetic grains in Co-Ag granular films" Journal of Applied Physics. 82. 764-771 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Magnetic properties and giant magnetoresistance of Fe/Au multilayers" Journal of Applied Physics. 82. 4428-4434 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Tunneling giant magnetoresistance in heterogeneous Fe-SiO_2 granular films" Physical Revew B. 56. 14566-14573 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Perpendicular magnetic anisotropy and giant magnetoresistance of Co-Au alloyed films" Proceeding of 4th Perpendicular Magn.Reco.Conf.363-366 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 坂本 勲: "Magnetic and structural changes of Au/Fe multilayers induced by Ar ion irradiation and thermal annealing" Proceeding of IUMRS International Conference. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Tunneling magnetoresistance in FeCo-SiO_2 granular films" Proceeding of IUMRS International Conference. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多 茂男: "Giant magnetoresistance of pseudo-granular Co-Au and Co-Ag films" Proceeding of IUMRS International Conference. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Magnetic structure and perpendicular magnetic anisotropy of rare-earth (Nd, Pr, Gd) /Fe multilayrs" Journal of Applied Physics. 79. 365-372 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Nawate: "Pseudo-granular giant magnetoresistance in NiFe/Ag multilayrs" Journal of Magnetism and Magnetic materials. 156. 383-384 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] I.Sakamoto: "CEMS study of the magnetic properties of Au/Fe multilayrs" Proceedings of ICAME-95. 635-638 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Giant magnetoresistance of perpendicular magnetic Co/Au multilayrs" 80. Journal of Applied Physics. 5175-5182 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Tunneling giant magnetoresistance in Fe-SiO_2 multilayred and alloyed films" Journal of Magnetism and Magnetic Materials. 165. 153-156 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] I.Sakamoto: "CEMS study of Au/Fe multilayrs in annealing process" Journal of Magnetism aand Magnetic Materials. 165. 208-211 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Size effect on giant magnetoresistance of Co-Ag films" Journal of Magnetism and Magnetic Materials. 165. 326-329 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Giant magnetoresistance and superparamagnetic grains in Co-Ag granular films" Journal of Applied Physics. 82. 764-771 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Magnetic properties and giant magnetoresistance of Fe/Au multilayrs" Journal of Applied Physics. 82. 4428-4434 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Tunneling giant magnetoresistance in heterogeneous Fe-SiO_2 granular films" Physical Revew. B56. 14566-14573 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Perpendicular magnetic anisotropy and giant magnetoresistance of Co-Au alloyed films" Proceedings of 4th Perpendicular Magn.Reco.Conf.363-366 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] I.Sakamoto: "Magnetic and structural changes of Au/Fe multilayrs induced by Ar ion irradiation and thermal annealing" Proceeding of IUMRS International Conference. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Tunneling magnetoresistance in FeCo-SiO_2 granular films" Proceeding of IUMRS International Conference. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Honda: "Giant magnetoresistance of pseudo-granular Co-Au and Co-Ag films" Proceeding of IUMRS International Conference. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本多茂男: "Magnetic structure and perpendicular magnetic anisotropy of rare-earth(Nd,Pr,Gd)/Fe multilayers" Journal of Applied Physics. 79. 365-372 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 縄手雅彦: "Pseudo-granular giant magnetoresistance in NiFe/Ag multilayers" Journal of Magnetism and Magnetic Materials. 156. 383-384 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 坂本勲: "CEMS study of the magnetic properties of Au/Fe multilayers" Proceeding of ICAME-95. 635-638 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Giant magnetoresistance of perpendicular magnetic Co/Au multilayers" Journal of Applied Physics. 80. 5175-5182 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Tunneling giant magnetoresistance in Fe-SiO_2 multilayered and alloyed films" Journal of Magnetism and Magnetic Materials. 165. 153-156 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 坂本勲: "CEMS study of Au/Fe multilayers in annealing process" Journal of Magnetism and Magnetic Materials. 165. 208-211 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Size effect on giant magnetoresistance of Co-Ag films" Journal of Magnetism and Magnetic Materials. 165. 326-329 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Giant magnetoresistance and superparamagnetic grains in Co-Ag granular films" Journal of Applied Physics. 82. 764-771 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Magnetic properties and giant magnetoresistance of Fe/Au multilayers" Journal of Applied Physics. 82. 4428-4434 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Tunneling giant magnetoresistance in heterogeneous Fe-SiO_2 granular films" Physical Revew. B56. 14566-14573 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Perpendicular magnetic anisotropy and giant magnetoresistance of Co-Au alloyed films" Proceeding of 4th Perpendicular Magn.Reco.Conf.363-366 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 坂本勲: "Magnetic and structural changes of Au/Fe multilayers induced by Ar ion irradiation and thermal annealing" Proceeding of IUMRS International Conference. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Tunneling magnetoresistance in FeCo-SiO_2 granular films" Proceeding of IUMRS International Conference. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男: "Giant magnetoresistance of pseudo-granular Co-Au and Co-Ag films" Proceeding of IUMRS International Conference. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] 本多茂男 他2名: "Giant magnetoresistance of perpendicular magnetic Co/Au multilayers," Journal of Applied Physics. 80・9. 5175-5182 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 縄手雅彦,本多茂男,他1名: "Pseudo-granular giant magnetoresistance in NiFe/Ag multilayers" Jouenal of Magnetism and Magnetic Materials. 156. 383-384 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 本多茂男 他2名: "Size effect on giant magnetoresistance of Co-Ag films" Journal of Magnetism and Magnetic Materials. (印刷中).

    • Related Report
      1996 Annual Research Report
  • [Publications] 本多茂男 他2名: "Tunneling giant magnetoresistance in Fe-SiO2 multilayered and alloyed films" Journal of Magnetism and Magnetic Materials. (印刷中).

    • Related Report
      1996 Annual Research Report
  • [Publications] 坂本勲,本多茂男,他2名: "CEMS stufy of Au/Fe multilayers in annealing process" Journal of Magnetism and Magnetic Materials. (印刷中).

    • Related Report
      1996 Annual Research Report
  • [Publications] 本多茂男 他2名: "Magnetic structure and perpendicular magnetic anisotropy of rare-earth (Nd, Pr, Gd)/Fe multilayers" Journal of Applied Physics. 79・1. 365-372 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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