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Phase transition of Ice detemined by maganetic measurement

Research Project

Project/Area Number 25610156
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Petrology/Mineralogy/Economic geology
Research InstitutionOsaka University

Principal Investigator

KONDO Tadashi  大阪大学, 理学(系)研究科(研究院), 教授 (20252223)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords氷天体 / 相転移 / 磁化率 / 低温高圧 / 氷 / 磁化率測定 / SQUID
Outline of Final Research Achievements

Water ice is universal material in space and has fifteen polymorphs reported so far. In this study, we tested a possibility of new method for studying structural change of ice using magnetic measurement. Experiments were conducted in Superconducting Quantum Interference Device magnetometer (SQUID, MPMS-7, Quantum design). We measured the magnetic moment of ice at temperature below room condition and/or at high-pressure condition to 0.2GPa. Pure water or salted water was used as starting sample. After accurate evaluation of magnetic moment of surrounding materials, solid-liquid transition of sample was detected with abrupt decrease of magnetic susceptibility. In the case of salt water, magnetic susceptibility decreased gradually with a temperature. In the high-pressure run, we found another jump in the profile. The condition was close to solid- solid phase boundary proposed. In this way, we successfully detected phase transition between liquid and solid in pure H2O and binary system.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (2 results)

All 2015 2014

All Presentation (2 results)

  • [Presentation] 低温高圧下におけるH2Oの磁化率測定2015

    • Author(s)
      近藤 忠、懸田 隆史、谷口 年史
    • Organizer
      日本地球惑星科学連合2015年大会
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2015-05-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] 高圧下におけるH2Oの磁化率測定2014

    • Author(s)
      近藤 忠、懸田 隆史、依田 優大、谷口 年史
    • Organizer
      第55回高圧討論会
    • Place of Presentation
      徳島大学
    • Year and Date
      2014-11-22
    • Related Report
      2014 Annual Research Report

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Published: 2014-07-25   Modified: 2019-07-29  

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