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

Nuclear Spin Order of High-Pressure Phase Solid ^3He in the Temperature Range of muK

Research Project

Project/Area Number 05452054
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionNagoya University

Principal Investigator

MAMIYA Takayoshi  Nagoya University, Dept.of Phys.Prof., 理学部, 教授 (20022600)

Co-Investigator(Kenkyū-buntansha) MIURA Yuichi  Nagoya University, Dept.of Phys., 理学部, 助教授 (30175608)
IWAHASHI Katsutoshi  Nagoya University, School of Inform.Assoc.Prof., 情報文化学部, 助教授 (40022602)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥7,000,000 (Direct Cost: ¥7,000,000)
KeywordsSolid helium 3 / Ultralow temperature / Nuclear spin order / Micro Kelvin / Nuclear magnetism / Nuclear demagnetization / Zero point motion / Direct exchange interaction / 非金属セル
Research Abstract

A large zero point motion of atoms in solid ^3He leads to the direct exchange interactions among atoms, which is responsible for nuclear magnetism. We studied the high-pressure samples of the solid ^3He in the low pressure phase as well as the high-pressure phase of solid ^3He. This study is very important for disclosing the entire profile of the nuclear magnetism in solid ^3He across the low-pressure and high-pressure phases.
We measured the magnetic susceptibility of samples with Neel temperatures from 49 to 355muK as a function of temperature and frequency. We discoverd anomalous susceptibility across the nuclear ordering temperatures. We also observed that the relaxation time of the energy flow deduced from the susceptibility decreased drastically by two orders of magnitude across the transition. This fact was explained by the multi-magnon processes of the energy flow in the ordered state.
For the high-pressure phase of solid ^3He, we showd by the measurements down to 34muK that it had a ferromagnetic tendency and predicted that its ordering temperature was 12muK,which temperature was formidable to reach. We adopted the mehtod of demagnenizing the nucler spins in solid ^3He to reach that low temperature by taking advantage of the long relaxation time due to the Kapitza thermal resistance. The pressure of solid ^3He decreased 60 Pa during and after demagnetization of solid ^3He from 2T down to 0.01T.The susceptiblity decreased 200 pH after demagnetization. Howeverwe observed no significant signature of the ordering transition. The further trials of observing the ordering transition is in progress. We note that the Neel temperature of 49muK in the low-pressure phase and the lowest temperature of the measurement for the high-pressure phase 34 muK are the record low temperatures for the solid ^3He.

Report

(2 results)
  • 1994 Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] S.Ade et al.: "Novel Susceptibility of bcc Solid 3He through the Nuclear Ordering Temperature." Phys.Rev.Lett.70. 473-476 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Miura et al.: "Pressure Measurements with a Precision of 0.001 ppm in Magnetic Fields." Rev.Sci.Instrum.64. 3215-3218 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Abe et al.: "A Nuclear Demagnetization Cryostat for Nuclear Ordering of hcp Solid ^3He." Physica B. 194-196. 49-50 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Mamiya et al.: "Formation of Solid ^3He ina Sintered Solver." Physica B. 194-196. 937-938 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Miura et al.: "Pressure Measurements of hcp Solid ^3He in Magnetic Fields." Physica B. 194-196. 927-928 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Tsujii et al.: "High Pressure Cell for Solid 3He using Stycast 1264." Rev.Sci.Instrum.66. 4742-4743 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Mamiya et al.: "Frequency Dependence of AC Susceptibility of bcc Solid ^3He." J.Low Temp.Phys.101. 689-693 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A.Ikeya et al.: "The Relaxation Mechanism in AC Susceptibility of bcc Solid ^3He." Europhys,Lett.31. 287-291 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Abe et al.: "Novel Susceptibility of bcc Solid 3He through the Nuclear Ordering Temperature." Phys.Rev.Lett.Vol.70. 473-476 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Miura et al.: "Pressure Measurements with a Precision of 0.001 ppm in Magnetic Fields." Rev.Sci.Instrum.Vol.64. 3215-3218 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Abe et al.: "A Nuclear Demagnetization Cryostat for Nuclear Ordering of hcp Solid ^3He." Physica B. Vol.194-196. 49-50 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Mamiya et al.: "Formation of Solid ^3He in a Sintered Solver." Physica B. Vol.194-196. 937-938 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Miura et al.: "Pressure Measurements of hcp Solid ^3He in Magnetic Fields." Physica B. Vol.194-196. 927-928 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Tsujii et al.: "High Pressure Cell for Solid 3He using Stycast 1264." Rev.Sci.Instrum.Vol.66. 4742-4743 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Mamiya et al.: "Frequency Dependence of AC Susceptibility of bcc Solid ^3He." J.Low Temp.Phys.Vol.101. 689-693 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A.Ikeya et al.: "The Relaxation Mechanism in AC Susceptibility of bcc Solid ^3He." Europhys.Lett.Vol.31. 287-291 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Miura: "Pressure measurement with a precision of 0.001 ppm on magnetic fields at low temperatures" Review of Scientific Instruments. 64. 3215-3218 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Abe: "A nuclear de magnetization cryostat for nuclear ordering of hcp solid ^3He" Physica B. 194&195(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Mamiya: "Formation of Solid ^3He in a sintered silver" Physica B. 194&195(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Mamiya: "Electrical resistivity of nonsuperconducting La-based compounds down to the mk temperature range" Physica B. 194&195(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Miura: "The dielectric anomaly in the proton glass phase of RDP(1-x)ADP(x)below 1K" Physica B. 194&195(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Miura: "Pressure measurement on hcp solid ^3He in magnetic fields" Physica B. 194&195(in press). (1994)

    • Related Report
      1993 Annual Research Report

URL: 

Published: 1993-04-01   Modified: 2020-05-15  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi