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Electron holography studies on the pattem formation preceding to displacive phase transformations

Research Project

Project/Area Number 18560641
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals
Research InstitutionTohoku University

Principal Investigator

MURAKAMI Yasukazu  Tohoku University, Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Associate Professor (30281992)

Co-Investigator(Kenkyū-buntansha) SHINDO Daisuke  Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Professor (20154396)
AKASE Zentaro  Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Assistant Professor (90372317)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,730,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordselectron holography / ferromagnetic shape memory alloy / martensitic transformation / multiferroic / electron microscopy / electron diffraction / domain structure / magnetic domain / TEM / 磁区構造 / 相変態 / マルテンサイト / 組織制御
Research Abstract

The aim of this research project is to reveal the mechanism of the macroscopic pattern formation that occurs before the onset of martensitic phase transformations in some class of ferromagnetic shape memory alloys. This macroscopic pattern formation was discovered by the head investigator recently, while the mechanism remained unsolved.
Detailed electron holography studied were carried out in order to reveal the temperature dependence of magnetic flux distribution in the parent phase of Ni-Fe-Ca, Fe-Pd, and Ni-Co-Mn-In alloys. In the Ni-Fe-Ca and Fe-Pd alloys, the magnetic flux pattern in the parent phase changes dramatically with an approach to Ms (martensitic transformation start temperature). Interestingly, the magnetic flux pattern observed at a temperature slightly higher than Ms was inherited to the magnetic domain structure in the martensitic phase. On the contrary, this type of pattern formation was not observed in a Ni-Co-Mn-In alloy. Diffuse scattering analysis by energy-filte … More red electron diffraction has revealed that the transverse lattice displacement on {110} planes is pronounced upon cooling in the parent phase of Ni-Fe-Ca and Ni-Co-Mn-In alloys, while the signal of the lattice displacement is quite weak in the Ni-Co-Mn-In alloy. This result implies that the change in the magnetic flux pattern in the Ni-Fe-Ca and Ni-Co-Mn-In alloys. In the Ni-Fe-Ga and Fe-Pd alloys, the magnetic flux pattern in the parent phase changes dramatically with an approach to Ms (martensitic transformation start temperature). Interestingly, the magnetic flux pattern observed at a temperature slightly higher than Ms was inherited to the magnetic domain structure in the martensitic phase. On the contrary, this type of pattern formation was not observed in a Ni-Co-Mn-In-alloy. Diffuse scattering analysis by energy-filtered electron diffraction has revealed that the transverse lattice displacement on {110}planes in pronounced upon cooling in the parent phase of Ni-Fe-Ga and Ni-Co-Mn-In alloys, while the signal of the lattice displacement is quite weak in the Ni-Co-Mn-In alloy. This result implies that the change in the magnetic flux pattern in the Ni-Fe-Ga and Ni-Co-Mn-In alloys is triggered by the premonitory lattice distortion in the parent phase. TEM observations of the martensite variant structures, which were obtained in an applied magnetic field (1.9T) and zero-field, respectively, supported the above interpretation.
The structure of martensite variants is a very important factor that is responsible for the shape memory properties. The result of the present work sheds light on the understanding the formation mechanism of martensite variants in ferromagnetic shape memory alloys. Less

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (44 results)

All 2007 2006

All Journal Article (33 results) (of which Peer Reviewed: 16 results) Presentation (11 results)

  • [Journal Article] Charge-ordered Domain Structure in YbFe_2O_4 Observed by Energy-filtered Transmission Electron Microscopy2007

    • Author(s)
      Y. Murakami , et. al.
    • Journal Title

      Phys. Rev. B 76

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Crystallography of Stress-induced B2-ζ_2' (trigonal) Martensitic Transformation in Au-49.5at%Cd Alloy2007

    • Author(s)
      Y. Murakami , et. al.
    • Journal Title

      Acta Mater. 55

      Pages: 3203-3211

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Transmission Electron Microscopy on Magnetic Phase Transformations in Functional Materials2007

    • Author(s)
      Y. Murakami , et. al.
    • Journal Title

      Metall. Mater. Trans. A 38

      Pages: 815-820

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Interaction between magnetic domain walls and antiphase boundaries in Ni_2Mn (A1,Ga) studied by electron holography and Lorentz microscopy2007

    • Author(s)
      T. Yano , et. al.
    • Journal Title

      Mater. Trans. 48

      Pages: 2636-2641

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Phase transformation and magnetic properties of ferromagnetic Cu-Mn-Ga alloys2007

    • Author(s)
      T. Kushima , et. al.
    • Journal Title

      Mater. Trans. 48

      Pages: 2840-2846

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Charge-ordered Domain Structure in YbFe_2O_4 Observed by Energy-filtered Transmission Electron Microscopy2007

    • Author(s)
      Y. Murakami et. al.
    • Journal Title

      Phys. Rev. B vol. 76

      Pages: 241091-241094

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Crystallography of Stress-induced B2-ζ_2''(trigonal) Martensitic Transformation in Au-49.5at%Cd Alloy2007

    • Author(s)
      Y. Murakami et. al.
    • Journal Title

      Acta Mater vol. 55

      Pages: 3203-3211

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Transmission Electron Microscopy on Magnetic Phase Transformations in Functional Materials2007

    • Author(s)
      Y. Murakami et. al.
    • Journal Title

      Metall. Mater. Trans. A vol. 38

      Pages: 815-820

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Interaction between magnetic domain walls and antiphase boundaries in Ni2Mn(Al,Ga) studied by electron holography and Lorentz microscopy2007

    • Author(s)
      T. Yano et. al.
    • Journal Title

      Mater. Trans vol. 48

      Pages: 2633-2641

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Phase transformation and magnetic properties of ferromagnetic Cu-Mn-Ga alloys2007

    • Author(s)
      T. Kushima et. al.
    • Journal Title

      Mater. Trans vol. 48

      Pages: 2840-2846

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Charge-ordered Domain Structure in YbFe_2O_4 Observed by Energy-filtered Transmission Electron Microscopy2007

    • Author(s)
      Y. Murakami, et. al.
    • Journal Title

      Phys. Rev. B 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Crystallography of Stress-induced B2-ζ_2'(trigonal) Martensitic Transformation in Au-49.5at%Cd Alloy2007

    • Author(s)
      Y. Murakami, et. al.
    • Journal Title

      Acta Mater. 55

      Pages: 3203-3211

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Transmission Electron Microscopy on Magnetic Phase Transformations in Functional Materials2007

    • Author(s)
      Y. Murakami, et. al.
    • Journal Title

      Metall. Mater. Trans. A 38

      Pages: 815-820

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interaction between magnetic domain walls and antiphase boundaries in Ni_2Mn(Al,Ga)studied by electron holography and Lorentz microscopy2007

    • Author(s)
      T. Yano, et. al.
    • Journal Title

      Mater. Trans. 48

      Pages: 2636-2641

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phase transformation and magnetic properties of ferromagnetic Cu-Mn-Ga alloys2007

    • Author(s)
      T. Kushima, et. al.
    • Journal Title

      Mater. Trans. 48

      Pages: 2840-2846

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic domain structure in a metamagnetic shape memory alloy Ni_<45>Co_<5>Mn_<36.7>In_<13.3>2006

    • Author(s)
      Y. Murakami , et. al.
    • Journal Title

      Scripta Mater. 55

      Pages: 683-686

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] TEM studies of crystallographic and magnetic microstructures in Ni-based ferromagnetic shape memory alloys2006

    • Author(s)
      Y. Murakami , et. al.
    • Journal Title

      Mater. Sci. Eng. A 438-440

      Pages: 1050-1053

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Simultaneous measurements of conductivity and magnetism by using microprobes and electron holography2006

    • Author(s)
      Y. Murakami , et. al.
    • Journal Title

      Appl. Phys. Lett. 88

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Magnetic domain structure in the presence of very thin martensite plates: Electron holography study on a thin-foil Fe-31.2at.%Pd alloy2006

    • Author(s)
      Y. Murakami , et. al.
    • Journal Title

      Acta Mater. 54

      Pages: 1233-1239

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Magnetic domains in the easy-plane ferromagnetic martensite2006

    • Author(s)
      V. A. Chernenko , et. al.
    • Journal Title

      Scripta Mater. 55

      Pages: 307-309

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Magnetic domains in a metamagnetic La (Fe_<0.90>Si_<0.10>)_<13> refrigerant2006

    • Author(s)
      N. Kawamoto , et. al.
    • Journal Title

      J. Appl. Phys. 100

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Magnetic domain structure in a metamagnetic shape memory alloy Ni_<45>Co_5Mn_<36.7> In_<13.3>2006

    • Author(s)
      Y. Murakami et. al.
    • Journal Title

      Scripta Mater. vol.55

      Pages: 283-286

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] TEM studies of crystallographic and magnetic microstructures in Ni-based ferromagnetic shape memory alloys2006

    • Author(s)
      Y. Murakami et. al.
    • Journal Title

      Mater. Sci. Eng. A vol. 438-440

      Pages: 1050-1053

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Simultaneous measurements of conductivity and magnetism by using microprobes and electron holography2006

    • Author(s)
      Y. Murakami et. al.
    • Journal Title

      Appl. Phys. Lett vol. 88

      Pages: 2231031-2231033

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Magnetic domain structure in the presence of very thin martensite plates: Electron holography study on a thin-foil Fe-31.2at.%Pd alloy2006

    • Author(s)
      Y. Murakami et. al.
    • Journal Title

      Acta Mater vol. 54

      Pages: 1233-1239

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Magnetic domains in the easy-plane ferromagnetic martensite2006

    • Author(s)
      V. A. Chernenko et. al.
    • Journal Title

      Scripta Mater vol. 55

      Pages: 307-309

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Magnetic domains in a metamagnetic La(Fe_<0.90>Si_<0.10>)_<13> refrigerant2006

    • Author(s)
      N. Kawamoto et. al.
    • Journal Title

      J.Appl. Phys vol. 100

      Pages: 439131-439134

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Magnetic domain structure in a metamagnetic shape memory alloy Ni_<45>Co_5Mn_<36.7>In_<13.3>2006

    • Author(s)
      Y.Murakami et al.
    • Journal Title

      Scripta Mater. 55

      Pages: 683-686

    • Related Report
      2006 Annual Research Report
  • [Journal Article] TEM studies of crystallographic and magnetic microstructures in Ni-based ferromagnetic shape memory alloys2006

    • Author(s)
      Y.Murakami et al.
    • Journal Title

      Mater. Sci. Eng. A 438-440

      Pages: 1050-1053

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Simultaneous measurements of conductivity and magnetism by using microprobes and electron holography2006

    • Author(s)
      Y.Murakami et al.
    • Journal Title

      Appl. Phys. Lett. 88

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Magnetic domain structure in the presence of very thin martensite plates : Electron holography study on a thin-foil Fe-31.2at.%Pd alloy2006

    • Author(s)
      Y.Murakami et al.
    • Journal Title

      Acta Mater. 54

      Pages: 1233-1239

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Magnetic domains in the easy-plane ferromagnetic martensite2006

    • Author(s)
      V.A.Chernenko et al.
    • Journal Title

      Scripta Mater. 55

      Pages: 307-309

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Magnetic domains in a metamagnetic La(Fe_<0.90>Si_<0.10>)_<13> refrigerant2006

    • Author(s)
      N.Kawamoto et al.
    • Journal Title

      J. Appl. Phys. 100

    • Related Report
      2006 Annual Research Report
  • [Presentation] TEM observation of domain wall pinning in a Ni_2Mn (Al,Ga) ferromagnetic shape memory alloy2007

    • Author(s)
      Y. Murakami , et. al.
    • Organizer
      Inter. Conf. Shape Memory and Superelestic Technologies
    • Place of Presentation
      つくば
    • Year and Date
      2007-12-04
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] TEM observation of domain wall pinning in a Ni_2Mn(Al, Ga) ferromagnetic shape memory alloy2007

    • Author(s)
      Y. Murakami ed. al.
    • Organizer
      Inter. Conf. Shape Memory and Superelastic Technologies
    • Place of Presentation
      Tsukuba
    • Year and Date
      2007-12-04
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] TEM observation of domain wall pinning in a Ni_2 Mn (A1, Ga) ferromagnetic shape memory alloy2007

    • Author(s)
      Y. Murakami, et. al.
    • Organizer
      Inter. Conf. Shape Memory and Superelestic Technologies
    • Place of Presentation
      つくば
    • Year and Date
      2007-12-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] Observation of charge ordered structure in YbFe_2O_4 by energy-filtered TEM2007

    • Author(s)
      Y. Murakami , et. al.
    • Organizer
      Inter. Conf. Intergranular and Interphase Boundaries in Materials
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2007-07-12
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Observation of charge ordered structure in YbFe_2O_4 by energy-filtered TEM2007

    • Author(s)
      Y. Murakami ed. al.
    • Organizer
      Inter. Conf. Intergranular and Interphase Boundaries in Materials
    • Place of Presentation
      Barcelona
    • Year and Date
      2007-07-12
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 電子線ホログラフィーを用いた機能性材料のドメイン解析2007

    • Author(s)
      村上恭和, 他
    • Organizer
      日本顕微鏡学会 学術講演会
    • Place of Presentation
      新潟
    • Year and Date
      2007-05-21
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Domain analysis of functional materials by electron holography2007

    • Author(s)
      Y. Murakami ed. al.
    • Organizer
      Annual meeting of the Japanese Society of Microscopy
    • Place of Presentation
      Niigata
    • Year and Date
      2007-05-21
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Ni_<45>Co_5Mn_<36.7>In_<13.3>合金の磁区構造の温度依存性2006

    • Author(s)
      矢野貴明, 他
    • Organizer
      日本金属学会 秋期大会
    • Place of Presentation
      新潟
    • Year and Date
      2006-09-17
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Temperature dependence of magnetic domain structure in a Ni_<45>Co_5Mn_<36.7>In_<13.3>alloy2006

    • Author(s)
      T. Yano ed. al.
    • Organizer
      Fall meeting of the Japan Institute of Metals
    • Place of Presentation
      Niigata
    • Year and Date
      2006-09-17
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] ローレンツ顕微鏡法を用いたNi_2Mn(Al,Ga)合金の磁壁評価2006

    • Author(s)
      矢野貴明, 他
    • Organizer
      日本金属学会 秋期大会
    • Place of Presentation
      新潟
    • Year and Date
      2006-09-16
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Lorentz microscopy study of magnetic domain walls in a Ni_2Mn(Al,Ga)alloy2006

    • Author(s)
      T. Yano ed. al.
    • Organizer
      Fall meeting of the Japan Institute of Metals
    • Place of Presentation
      Niigata
    • Year and Date
      2006-09-16
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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