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2002 Fiscal Year Final Research Report Summary

Design of new high pressure apparatus using a phase transition induced by temperature or magnetic field

Research Project

Project/Area Number 12554011
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionKyushu University

Principal Investigator

OOMI Gendo  Kyushu university, faculty of science, Professor, 大学院・理学研究院, 教授 (00111146)

Co-Investigator(Kenkyū-buntansha) OHASHI Masashi  Kyushu university, faculty of science, research associate, 大学院・理学研究院, 助手 (10336000)
KAGAYAMA Tomoko  Kumamoto university, the faculty of engineering, associate professor, 工学部, 助教授 (40274675)
NISHIDA Minoru  Kumamoto university, graduate school of science and technology, associate professor, 大学院・自然科学研究科, 助教授 (90183540)
Project Period (FY) 2000 – 2002
KeywordsMartensite transition / high pressure apparatus / physical property of electron / superconductivity
Research Abstract

The purpose of this project is to design a high pressure apparatus using a material which shows a change of the length on the phase transition induced by temperature or magnetic fields. In the present work, we used a shape memory alloy or giant magnetostrictive alloy as a device to generate high pressure. The results im the present work are summarized as follows,
1)We selected Ti-Ni shape memory alloy to generate a pressure, in which 3% lengh change is expected on the martensitic transformation. This means that 1 mm length change is expected when we use 30 mm Ti-Ni rod. The fundamental properties of this alloy are investigated.
2) By using this Ti-Ni one way shape memory alloy, it was revealed that we can reach about 10 GPa when we use Bridgman type apparatus having a face of 3 mm in diameter.
3) In the usual experiments, we repeat heating and cooling process to obtain the temperature dependence of the physical quantities such as volume or magnetic susceptibilities. For this reason, we used the two ways shape memory alloys in which the change in the length is smaller than that of one way alloys. It is found that we can get 5 GPa by using this alloy.
To conclude, we can reach 10 GPa or more using the Ti-Ni shape memory alloys, which gives a large progress in this research area. By applying this method to the diamond anvils, we will be able to get higher pressure than 10 GPa.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] G.Oomi et al.: "Relation between the Superconducting Transition Temperature and the Axial Ratio in RNi_2B_2C (R=Y, Ho, Er, Tm, Lu) under High Pressure"High Pressure Research. 22. 195-198 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] G.Oomi et al.: "Effect of pressure on the superconductivity of RuSm_<1.4> Ce_<0.6>Sr_2Cu_2O_<10>"Physica B. 312-313. 88-90 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Ohashi et al.: "Anomolous Electrical Resistivity of CeRh_2Si_2 near the Pressure-Induced Quantum Critical Point"Journal of Physical Society of Japan. Supplement. 22. 362-364 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 巨海玄道: "圧力封入技術の現状と問題点"高圧力の科学と技術. 12. 294-301 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.Honda et al.: "High pressure apparatus for the measurement of thermal and transport properties at multi-extreme conditions"J.Phys.: Condens Matter. 14. 10501-10505 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] G.Oomi et al.: "The effect of pressure on the superconductivity and magnetism of RuSr_2GdCu_2O_8"J.Phys.: Condens Matter. 14. 10747-10751 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] G. Oomi et. al.: "Relation between the Superconducting Transition Temperature and the Axial Ratio in RNi_2B_2C (R= Y, Ho, Er, Tm, Lu) under High Pressure."High Pressure Research. 22. 195-198 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] G. Oomi et. al.: "Effect of pressure on the superconductivity of RuSm_<1.4> Ce_<0.6> Sr_2Cu_2O_<10>"Physica B. 312-313. 88-90 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Ohashi et. al.: "Anomolous Electrical Resistivity of CeRh_2Si_2 near the Pressure-Induced Quantum Critical Point."Journal of Physical Society of Japan.. Supplement 22. 362-364 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] G. Oomi: "How to maintain the pressure seal -present status and perspective-"The review of high pressure science and technology. 12. 294-301 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F. Honda et. al: "High pressure apparatus for the measurement of thermal and transport properties at multi-extreme conditions"J. Phys.: Condens Matter. 14. 10501-10505 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] G. Oomi et. al: "The effect of pressure on the superconductivity and magnetism of Ru Sr_2GdCu_2O_8"J. Phys.: Condens Matter. 14. 10747-10751 (2002)

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

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Published: 2004-04-14  

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