• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Nanostructure and low-dimensional properties of CMR materials

Research Project

Project/Area Number 10650007
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionNagoya University

Principal Investigator

MATSUI Masaaki  Nagoya University, School of Engineering, Professor, 工学研究科, 教授 (90013531)

Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsMagnetoresistance / Ferromagnet / Epitaxial film / Low-dimensionality / Mn oxide / Nanostructure / Perovskite / Tunneling effect / ペロブスカイト型化合物
Research Abstract

The colossal magnetoresistance (CMR) ferromagnets of perovskite series LaィイD2n-nxィエD2CaィイD21+nxィエD2MnィイD2nィエD2ィイD23+1ィエD2 (n=2,3, and ∞) have been examined with respected to their electrical and magnetic properties. Results on the transport properties of epitaxial a-axis thin film samples with a fixed carrier concentration (x=0.3) have indicated that a reduction in the number of layers results in systematic changes in the various features. These include an increase in resistivity, a decrease in resistivity peak temperature TcィイD1pィエD1 corresponding to the metal-insulator transition, an enhancement of the maximum MR near TcィイD1pィエD1, and an increase in low temperature intrinsic MR. In order to explain the variation in these features with the number of MnOィイD12ィエD1 layers, it is necessary to take both c-axis transfer interaction an two dimensional spin fluctuation into account. These insights are important from the view points of basic understanding of the CMR mechanism and their practical applications.
The lattice effect of LaィイD2n-nxィエD2CaィイD21+nxィエD2MnィイD2nィエD2OィイD23n+1ィエD2 have been investigated using thin films (n=2 and ∞) grown on various substrates with the lattice mismatch in the range of -4 〜1%. For the n=2 thin films, the curie temperature decreased very sharply with a decrease of the out-of plane lattice parameters, which results in the enhancement of the MR effect. These results are interpreted in terms of the strain effect induced by the lattice mismatch.
The junctions are fabricated using the perovskite manganite (n=∞) and Fe (or Co). These results suggest that the spin polarization of tunneling electrons in these junctions is highly dependent on the electronic structure of the barrier/Fe (or Co) interface.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] H. Asano, et al.: "Magnetotransport in Perovskite Series La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1> Ferromagnets"Physical Review. B57. 1052-1056 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Asano, et al.: "Magnetotransport in Thin Films of La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1>(n=2,3,and ∞)"Material Research Society Symposium. 494. 131-136 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Asano, et al.: "Magnetism and Transport of Perovskite Ferromagnet La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1>"Journal of Magnetic Society of Japan. 22. 107-114 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Jun Hayakawa et al.: "Magnetic and Electrical Properties of La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1> Thin Films"Journal of Magnetic Society of Japan. 22. 401-404 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Jun Hayakawa et al.: "Strain Effect in La_<1-x>Ca_xMnO_3 Thin Films"Journal of Magnetic Society of Japan. 23. 102-104 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Jun Hayakawa et al.: "Strain Effect of La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1> Thin Films"Journal of Magnetic Society of Japan. 23. 1141-1144 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Arita et al.: "Transmission Electron Microscopy of La_<0.7>Ca_<0.3>MnO_3 CMR Thin Films"Japanese Society of Electron Microscopy. 48. 381-385 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Asano, et al.: "Pulsed-laser deposited Sr_2FeMoO_6 Thin Films : Positive and Negative Magnetoresistance Regimes"Applied Physics Letters. 74. 3696-3698 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Arita et al.: "Transmission Electron Microscopy of La_<0.7>Ca_<0.3>MnO_3 Thin Films"Journal of Magnetism and Magnetic Materials. 84. 84-90 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Asano, J. Hayakawa, and M. Matsui: "Magnetotransport in Perovskite Series LaィイD2n-nxィエD2CaィイD21+nxィエD2MnィイD2nィエD2OィイD23n+1ィエD2 Ferromagnets"Phys. Rev.. B57. 1052-1056 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Asano, J. Hayakawa, and M. Matsui: "Magnetotransport in Thin Films of LaィイD2n-nxィエD2CaィイD21+nxィエD2MnィイD2nィエD2OィイD23n+1ィエD2 (n=2,3, and ∞)"Mat. Res. Soc. Symp. 494. 131-136 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Asano, J. Hayakawa, and M. Matsui: "Magnetism and Transport of Perovskite Ferromagnet LaィイD2n-nxィエD2CaィイD21+nxィエD2MnィイD2nィエD2OィイD23n+1ィエD2"J. Magn. Soc. Jpn. (in Japanese). 22. 107-114 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] J. Hayakawa, H. Asano, and M. Matsui: "Magnetic and Electrical Properties of LaィイD2n-nxィエD2CaィイD21+nxィエD2MnィイD2nィエD2OィイD23n+1ィエD2"J. Magn. Soc. Jpn. (in Japanese). 22. 401-404 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] J. Hayakawa, H. Asano, and M. Matsui: "Strain Effect in LaィイD2n-nxィエD2CaィイD21+nxィエD2MnOィイD23ィエD2Thin Films"J. Magn. Soc. Jpn.. 23. 102-104 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] J. Hayakawa, H. Asano, and M. Matsui: "Strain Effect of LaィイD2n-nxィエD2CaィイD21+nxィエD2MnィイD2nィエD2OィイD23n+1ィエD2 Thin Films"J. Magn. Soc. Jpn.. 23. 1141-1144 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Arita, A. Sasaki, K. Hamada, A. Okada, J. Hayakawa, H. Asano, M. Matsui and H. Takahashi: "Transmission Electron Microscopy of LaィイD20.7ィエD2CaィイD20.3ィエD2MnOィイD23ィエD2 CMR Films"Jpn. Journal of Electron Microscopy. 48. 381-385 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Asano, et al: "Pulsed-laser deposited SrィイD22ィエD2FeMoOィイD26ィエD2 Thin Films : Positive and Magnetoresitance Regimes"Appl. Phys. Lett.. 74. 3696-3698 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Arita, A. Sasaki, K. Hamada, A. Okada, J. Hayakawa, H. Asano, M. Matsui and H. Takahashi: "Transmission Electron Microscopy of LaィイD20.7ィエD2CaィイD20.3ィエD2MnOィイD23ィエD2 Thin Films"Journal of Magnetism and Magnetic Materials. 84. 84-90 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Jun Hayakawa et al.: "Strain effect in La_<1-x>Ca_xMnO_3 thin films"Journal of Magnetic Society of Japan. 23. 102-104 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Jun Hayakawa et al.: "Strain effect of La_<n-nx>Ca_<1+nx>MnO_<3n+1> thin films"Journal of Magnetic Society of Japan. 23. 1141-1144 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Asano et al.: "Magnetotransport in thin films of La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1>"Material Research Society Symposium Proceedings. 494. 131-136 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M.Arita et al.: "Transmission Electron Microscopy of La_<1-x>Ca_xMnO_3 thin films"Japanese Society of Electron Microscopy. 48. 381-385 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Asano et al.: "Pulsed-laser deposited Sr_2FeMoO_6 Thin Films : Positive and Negative Magneto resistance Regimes"Applied Physics Letters. 74. 3696-3698 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] M.Arita et al.: "Transmission Electron Microscopy of La_<0.7>Ca_<0.3>MnO_3 thin Films"Journal of Magnetism and Magnetic Materials. (to be published).

    • Related Report
      1999 Annual Research Report
  • [Publications] Hidefumi Asano et al.: "Magnetotransport in perovskite series La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1> ferromagnets" Physical Review. B57. 1052-1056 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hidefumi Asano et al.: "Magnetotransport in thin films of La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1> (n=2,3,and ∞)" Materials Research Society Symposium. 494. 131-136 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 浅野秀文 他: "ペロブスカイト型La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1>強磁性体の磁気・伝導物性" 日本応用磁気学会誌. 22. 107-114 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 早川 純 他: "La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1>薄膜の磁気的・電気的性質" 日本応用磁気学会誌. 22. 401-404 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Jun Hayakawa et al.: "Strain effect in La_<1-x>Ca_xMnO_3 thin films" Journal of Magnetic Society of Japan. 23. 102-104 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Jun Hayakawa et al.: "Strain effect in La_<n-nx>Ca_<1+nx>Mn_nO_<3n+1> thin films" Journal of Magnetic Society of Japan. 23(In press). (1999)

    • Related Report
      1998 Annual Research Report

URL: 

Published: 1998-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi