Aso Naofumi

写真a

Title

Professor

Researcher Number(JSPS Kakenhi)

40313118

Homepage URL

http://www.phys.u-ryukyu.ac.jp/wiki/index.php?Aso%20Lab

Current Affiliation Organization 【 display / non-display

  • Duty   University of the Ryukyus   Faculty of Science   Physics and Earth Sciences   Professor  

University 【 display / non-display

  •  
    -
    1991.03

    Tohoku University   Faculty of Science   Graduated

Graduate School 【 display / non-display

  •  
    -
    1993.03

    Tohoku University  Graduate School, Division of Natural Science  Doctor's Course (first term)  Completed

  •  
    -
    1997.09

    Tohoku University  Graduate School, Division of Natural Science  Doctor's Course (second term)  Completed

Academic degree 【 display / non-display

  • Tohoku University -  Doctor (Science)

External Career 【 display / non-display

  • 1997.10
    -
    1999.03

    Center for Low Temperature Science Tohoku University, Japan Society for the Promotion of Science Research Fellowship for Young Scientists  

  • 1999.04
    -
    2007.03

    Institute for Solid State Physics of the University of Tokyo, Assistant Professor  

  • 2007.04
    -
    2008.09

    Institute for Solid State Physics of the University of Tokyo, Assistant Professor  

  • 2008.10
    -
    2016.10

    University of the Ryukyus, Faculty of Science, Department of Physics and Earth Sciences, Physics Program, Associate Professor  

Affiliated academic organizations 【 display / non-display

  • 1991.06
    -
    Now
     

    The Physical Society of Japan 

  • 2001.04
    -
    2003.03
     

    The Japanese Society for Neutron Science    Treasurer Secretary

  • 2001.04
    -
    Now
     

    The Japanese Society for Neutron Science 

  • 2003.04
    -
    2005.03
     

    The Japanese Society for Neutron Science 

  • 2008.04
    -
    2009.03
     

    The Japanese Society for Neutron Science 

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Research Interests 【 display / non-display

  • 物性物理,固体物理,磁性,超伝導

Research Areas 【 display / non-display

  • Natural Science / Magnetism, superconductivity and strongly correlated systems

Acquisition of a qualification 【 display / non-display

  • Usual Car License (first kind)

  • Crane Motorman

  • Hang Up and Remove Work Skill Person

  • Electrical Work Person (second kind)

Thesis 【 display / non-display

  • 中性子散乱による重い電子系ウラン化合物の研究

    1997.09

Published Papers 【 display / non-display

  • Zn-site Substitution Effect in YbCo<inf>2</inf>Zn<inf>20</inf>

    Kobayashi R.

    Journal of Physics: Conference Series ( Journal of Physics: Conference Series )  807 ( 1 )   2017.04

    Type of publication: Research paper (scientific journal)

  • Magnetic Structure of Divalent Europium Compound EuGa₄ Studied by Single-Crystal Time-of-Flight Neutron Diffraction

    Kawasaki Takuro, Kaneko Koji, Nakamura Ai, Aso Naofumi, Hedo Masato, Nakama Takao, Ohhara Takashi, Kiyanagi Ryoji, Oikawa Kenichi, Tamura Itaru, Nakao Akiko, Munakata Koji, Hanashima Takayasu, Onuki Yoshichika

    Journal of the Physical Society of Japan ( The Physical Society of Japan )  85 ( 11 ) 114711 - 1-5   2016.10

    Type of publication: Research paper (scientific journal)

     View Summary

    The magnetic structure of the intermetallic compound EuGa<sub>4</sub>was investigated using single-crystal neutron diffraction with the time-of-flight (TOF) Laue technique on the new diffractometer SENJU at the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC). Despite of the high neutron absorption of Eu, a vast number of diffraction spots were observed without isotope enrichment. The magnetic reflections appeared at positions with diffraction indices of <italic>h</italic>+ <italic>k</italic>+ <italic>l</italic>≠ 2<italic>n</italic>below 16 K, indicating that the ordering vector is <inline-formula><tex-math version="MathJax"><![CDATA[\(\boldsymbol{{q}} = (0,0,0)\)]]></tex-math></inline-formula>. The continuous evolution of the magnetic reflection intensity below <italic>T</italic><sub>N</sub>follows a squared Brillouin function for <italic>S</italic>= 7/2. By adopting a wavelength-dependent absorption collection, the magnetic structure of EuGa<sub>4</sub>was revealed that a nearly full magnetic moment of 6.4 μ<sub>B</sub>of Eu lies within the basal plane of the lattice. In this study, we reveal a well-localized divalent Eu magnetism in EuGa<sub>4</sub>and demonstrate a high ability of SENJU to investigate materials with high neutron absorption.

  • Switching of Magnetic Ordering in CeRhIn5 under Hydrostatic Pressure

    Naofumi Aso, Kiwamu Ishii, Hideki Yoshizawa, Tetsuya Fujiwara, Yoshiya Uwatoko, Gen-Fu Chen, Noriaki K. Sato, and Kazumasa Miyake

    Journal of the Physical Society of Japan ( その他の出版社 )  78 ( 7 ) 073703_1-073703_4   2009.07 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

     View Summary

    Magnetic neutron diffraction measurements were carried out on the heavy-fermion antiferromagnet CeRhIn5 under hydrostatic pressure. The incommensurate (IC) magnetic ordering is known to be characterized by the propagation vector tau = (0.5,0.5, +/-delta). We have found that when the temperature is lowered at P similar to 1.48 GPa, the magnetic Bragg peak with delta = 0.326 rapidly disappears and instead a new Bragg peak with delta = 0.391 suddenly emerges at a temperature close to the superconducting transition temperature. This suggests the possibility that the antiferromagnetic order is affected by the superconductivity.

  • Molecular Spin Resonance in the Geometrically Frustrated Magnet MgCr2O4 by Inelastic Neutron Scattering

    K. Tomiyasu, H. Suzuki, M. Toki, S. Itoh, M. Matsuura, N. Aso and K. Yamada

    Physical Review Letters ( その他の出版社 )  101 ( 17 ) 177401_1-177401_4   2008.10 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Pressure-Induced Commensurate Magnetic Order in Multiferroic HoMn2O5

    Hiroyuki Kimura, Keisuke Nishihata, Yukio Noda, Naofumi Aso, Kazuyuki Matsubayashi, Yoshiya Uwatoko, and Tetsuya Fujiwara

    Journal of the Physical Society of Japan ( その他の出版社 )  77 ( 6 ) 63704_1-63704_4   2008.06 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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Presentations 【 display / non-display

  • Neutron Scattering from UPd2(Al1-xGax)3

    N. Aso

    U.S.-Japan Neutron Scattering Workshop on STRUCTURAL AND MAGNETIC PROPERTIES OF NOVEL MATERIALS  2003.02  -  2003.02 

  • Neutron Scattering Study of Magnetic Excitations in the Two-Dimensional Spin Gap System SrCu2(BO3)2

    N. Aso, K. Nukui, M. Nishi, K. Kakurai, H. Kageyama, K. Onizuka, Y. Ueda, O. Cepas, T. Ziman, L.-P. Regnault and J.-P. Boucher

    U.S.-Japan Neutron Scattering Workshop – Frustrated and Highly Correlated Electrons, Present and Future Trends –  2001.03  -  2001.03