Proceedings of the Japan Academy, Series B
Online ISSN : 1349-2896
Print ISSN : 0386-2208
ISSN-L : 0386-2208
Volume 89, Issue 2
Displaying 1-2 of 2 articles from this issue
  • Munetoshi TOKUMARU
    2013 Volume 89 Issue 2 Pages 67-79
    Published: February 08, 2013
    Released on J-STAGE: February 08, 2013
    The solar wind, a supersonic plasma flow continuously emanating from the Sun, governs the space environment in a vast region extending to the boundary of the heliosphere (∼100 AU). Precise understanding of the solar wind is of importance not only because it will satisfy scientific interest in an enigmatic astrophysical phenomenon, but because it has broad impacts on relevant fields. Interplanetary scintillation (IPS) of compact radio sources at meter to centimeter wavelengths serves as a useful ground-based method for investigating the solar wind. IPS measurements of the solar wind at a frequency of 327 MHz have been carried out regularly since the 1980s using the multi-station system of the Solar-Terrestrial Environment Laboratory (STEL) of Nagoya University. This paper reviews new aspects of the solar wind revealed from our IPS observations.

    (Communicated by Atsuhiro NISHIDA, M.J.A.)
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  • Teruya SHINJO
    2013 Volume 89 Issue 2 Pages 80-96
    Published: February 08, 2013
    Released on J-STAGE: February 08, 2013
    The author has been actively engaged in research on nanomagnetic materials for about 50 years. Nanomagnetic materials are comprised of ferromagnetic systems for which the size and shape are controlled on a nanometer scale. Typical examples are ultrafine particles, ultrathin films, multilayered films and nano-patterned films. In this article, the following four areas of the author’s studies are described.
    (1) Mössbauer spectroscopic studies of nanomagnetic materials and interface magnetism.
    (2) Preparation and characterization of metallic multilayers with artificial superstructures.
    (3) Giant magnetoresistance (GMR) effect in magnetic multilayers.
    (4) Novel properties of nanostructured ferromagnetic thin films (dots and wires).
    A subject of particular interest in the author’s research was the artificially prepared multilayers consisting of metallic elements. The motivation to initiate the multilayer investigation is described and the physical properties observed in the artificial multilayers are introduced. The author’s research was initially in the field of pure physical science and gradually extended into applied science. His achievements are highly regarded not only from the fundamental point of view but also from the technological viewpoint.

    (Communicated by Shun-ichi IWASAKI, M.J.A.)
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