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1988 Fiscal Year Final Research Report Summary

Study of the dynamic behavior of liquid Oxygen under high magnetic field

Research Project

Project/Area Number 62460036
Research Category

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

Allocation TypeSingle-year Grants
Research Field 物性一般(含極低温・固体物性に対する理論)
Research InstitutionThe Research Center for Extreme Materials, Osaka University

Principal Investigator

YAMAGISHI Akio  The Research Institute for Extreme Materials, Osaka University, 極限物質研究センター, 助教授 (10006273)

Co-Investigator(Kenkyū-buntansha) HORI Hidenobu  Faculty of Science, Osaka University, 理学部, 助教授 (20028244)
UYEDA Chiaki  College of General Education, Osaka University, 教養部, 助手 (50176591)
DATE Muneyuki  Faculty of Science, Osaka University, 理学部, 教授 (80028076)
Project Period (FY) 1987 – 1988
Keywordsliquid oxygen / two-molecule transition / high magnetic field / magneto-volume effect / superconducting magnet / paramagnetic liquid / liquid surface / magnetic fluid / 磁気流体
Research Abstract

In this research program, we aided to analyze theoretically and experimentally the dynamic behavior of liquid oxygen under high magnetic field and visually observe the phenomena.
Oxygen is ideal paramagnetic liquid so that it was expected to behave differently under strong magnetic field. We found mainly three magnetic effects: 1) faint blue color of liquid oxygen fades out nonlinearly with applied field intensity, 2) liquid oxygen expands with magnetic field and 3) liquid surface takes sharp cone shape under strong magnetic field.
The absorption of 633 and 577 nm light, shich is a cause of blue color, is due to two molecule transitions ^3sigma_g ^3sigma_g-^1delta_g ^1delta_g. From spin conservation before and agter the transition, the total spin moment of the ground state should be zero. However under an applied magnetic gield, each spins are oriented in the field direction so that the total spin has non-zero value and the transition would be inhibited. This is the outline of the "blue color disappearance". We found "spin-pair model" for liquid oxygen which explains the above phenomenon well. Essential point is that distance of two oxygen molecules interacting is fairly short compared with the other molecules surrounding them and the two molecules makes new states with two spins S=1.
Two oxygen molecules are coupled with antiferromagnetic interaction so that repulsive force elongates the molecular distance when two spins are oriented by magnetic field. This is the origin of the magneto-volume effect. 0.2% increase of volume is observed with 8 T mabnetic field.
The surface shape is determined to have minimum energy. Surface cone shape is due to the balance of surface tension, gravity force and magnetic force. The changing of the surface shape is recorded in video-recorder and photo-pictures.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] C.,Uyeda;A.,Yamagishi;M.,Date: Journal of Physical Society of Japan. 57. 3954-3960 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.,Uyeda;A.,Yamagishi;M.,Date;H.,Hori: Physica B. (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.,Date: Physica B. (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.,Date;A.,Yamagishi: IEEE Transactions on Magnetics. MAG-23. 3257-3262 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.,Uyeda;A.,Yamagishi;M.,Date: Journal of the Physical Society of Japan. 56. 3444-3446 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C. Uyeda; A. Yamagishi; M. Date: "Liquid Oxygen under High Magnetic Field" Journal of the Physical Society of Japan. 57. 3954-3960 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C. Uyeda; A. Yamagishi; H. Hori; M. Date: "Magnetic properties of liquid oxygen in high Magnetic field" Physica B. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Date: "Advances in high field magnetism at Osaka" Physica B. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Date; A. Yamagishi: "Generation and Applications of non-destructive Pulsed Magnetic Field" IEEE Transactions on Magnetics. MAG-23. 3257-3262 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C. Uyeda; A. Yamagishi; M. Date: "Magneto-volume Effect of Liquid Oxygen" Journal of the Physical Society of Japan. 56. 3444-3446 (1987)

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

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Published: 1990-03-20  

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