Current Affiliation Organization 【 display / non-display 】

Current Affiliation Organization 【 display / non-display 】

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Academic degree 【 display / non-display 】

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External Career 【 display / non-display 】

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Affiliated academic organizations 【 display / non-display 】

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Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

Acquisition of a qualification 【 display / non-display 】

Acquisition of a qualification 【 display / non-display 】

Thesis 【 display / non-display 】

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 】

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)

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    DOI

• 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 EuGa₄was 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>_Nfollows a squared Brillouin function for <italic>S</italic>= 7/2. By adopting a wavelength-dependent absorption collection, the magnetic structure of EuGa₄was revealed that a nearly full magnetic moment of 6.4 μ_Bof Eu lies within the basal plane of the lattice. In this study, we reveal a well-localized divalent Eu magnetism in EuGa₄and demonstrate a high ability of SENJU to investigate materials with high neutron absorption.

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• 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.

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• 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)

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• 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 】

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 

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2014.04  -  2017.03 

  Direct: 3,800,000 (YEN)  Overheads: 1,140,000 (YEN)  Total: 4,940,000 (YEN)

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2011  -  2013 

• Grant-in-Aid for Scientific Research on Innovative Areas

  Project Year: 2011  -  2012 

  Direct: 3,600,000 (YEN)  Overheads: 1,080,000 (YEN)  Total: 4,680,000 (YEN)

• Grant-in-Aid for Scientific Research on Innovative Areas

  Project Year: 2009  -  2010 

  Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

• Grant-in-Aid for Young Scientists(B)

  Project Year: 2003  -  2005 

  Total: 3,600,000 (YEN)

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