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Journal Articles

Temperature dependence of spin excitations in the frustrated spin chain system CuGeO$$_3$$

Fujita, Masaki*; Frost, C. D.*; Bennington, S. M.*; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio*; Ikeuchi, Kazuhiko*; Arai, Masatoshi

Journal of the Physical Society of Japan, 82(8), p.084708_1 - 084708_5, 2013/08

https://doi.org/10.7566/JPSJ.82.084708
 Times Cited Count：1 Percentile：10.84(Physics, Multidisciplinary)

Journal Articles

The Fermi chopper spectrometer 4SEASONS at J-PARC

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Nakajima, Kenji; Kawamura, Seiko; Yokoo, Tetsuya*; Nakatani, Takeshi; Maruyama, Ryuji; Soyama, Kazuhiko; et al.

Journal of the Physical Society of Japan, 80(Suppl.B), p.SB025_1 - SB025_6, 2011/01

https://doi.org/10.1143/JPSJS.80SB.SB025
 Times Cited Count：116 Percentile：94.60(Physics, Multidisciplinary)

Journal Articles

New technique for inelastic neutron scattering measurement demonstrated on the chopper spectrometer 4SEASONS at J-PARC

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Yokoo, Tetsuya*; Nakatani, Takeshi; Arai, Masatoshi; Fujita, Masaki*

Kotai Butsuri, 45(2), p.79 - 89, 2010/02

http://ci.nii.ac.jp/naid/40017025649

Inelastic neutron scattering measurement using multiple incident energies can drastically enhances the measurement efficiency. The article reviews the principle of this new technique and an example of the measurement using the chopper spectrometer 4SEASONS of the pulsed neutron experimental facility in Japan Proton Accelerator Research Complex (J-PARC).

Journal Articles

First demonstration of novel method for inelastic neutron scattering measurement utilizing multiple incident energies

Nakamura, Mitsutaka; Kajimoto, Ryoichi; Inamura, Yasuhiro; Mizuno, Fumio; Fujita, Masaki*; Yokoo, Tetsuya*; Arai, Masatoshi

Journal of the Physical Society of Japan, 78(9), p.093002_1 - 093002_4, 2009/09

https://doi.org/10.1143/JPSJ.78.093002
 Times Cited Count：126 Percentile：95.01(Physics, Multidisciplinary)

We succeeded in experimentally demonstrating that a series of two-dimensional maps of a dynamical structure factor in momentum-energy space with multiple incident energies can be simultaneously obtained by one measurement. This method reduces the dead time of time-of-flight measurement, and thus it markedly increases the measurement efficiency. Our achievement realized using the Fermi chopper spectrometer 4SEASONS in J-PARC is expected to open up new possibilities of inelastic neutron scattering measurements.

Oral presentation

Current status of the chopper spectrometer 4SEASONS at MLF, J-PARC

Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Nakajima, Kenji; Inamura, Yasuhiro; Takahashi, Nobuaki; Maruyama, Ryuji; Soyama, Kazuhiko; Mizuno, Fumio; Shibata, Kaoru; et al.

no journal, , 

no abstracts in English

Oral presentation

Chopper-type neutron inelastic spectrometer 4SEASONS at MLF, J-PARC

Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Nakajima, Kenji; Inamura, Yasuhiro; Takahashi, Nobuaki; Maruyama, Ryuji; Soyama, Kazuhiko; Mizuno, Fumio; Shibata, Kaoru; et al.

no journal, , 

no abstracts in English

Oral presentation

Current status of the chopper spectrometer 4SEASONS at J-PARC

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Yokoo, Tetsuya*; Inamura, Yasuhiro; Mizuno, Fumio; Nakajima, Kenji; Takahashi, Nobuaki; Kawamura, Seiko; Maruyama, Ryuji; Soyama, Kazuhiko; et al.

no journal, , 

no abstracts in English

Oral presentation

Spin polarized neutron scattering study in NpFeGa$$_5$$

Metoki, Naoto; Yamamoto, Etsuji; Honda, Fuminori*; Kaneko, Koji; Jonen, Shintaro; Mizuno, Fumio; Sugai, Takashi*; Aoki, Dai*; Homma, Yoshiya*; Shiokawa, Yoshinobu*

no journal, , 

no abstracts in English

Oral presentation

Magnetic structure and phase diagram of NpIn$$_3$$ studied by neutron scattering under magnetic field

Metoki, Naoto; Mizuno, Fumio; Sugai, Takashi*; Haga, Yoshinori; Homma, Yoshiya*; Aoki, Dai*; Shiokawa, Yoshinobu

no journal, , 

no abstracts in English

Oral presentation

The Magnetic structure study of 4$$f$$-115-system TbRhIn$$_5$$

Metoki, Naoto; Sugai, Takashi*; Mizuno, Fumio; Haga, Yoshinori; Hieu, N.*; Onuki, Yoshichika

no journal, , 

no abstracts in English

Oral presentation

NpIn$$_{3}$$ study by neutron scattering under magnetic field

Mizuno, Fumio; Sugai, Takashi; Kaneko, Koji; Metoki, Naoto; Haga, Yoshinori; Aoki, Dai*; Homma, Yoshiya*; Shiokawa, Yoshinobu*

no journal, , 

NpIn$$_{3}$$ has the AuCu$$_{3}$$-type cubic structure. The structure is the same as the pressure-induced superconductor CeIn$$_{3}$$. It was reported that NpIn$$_{3}$$ orders ferromagnetcally below T$$_{C}$$ = 14 K and antiferromagnetically at T$$_{N}$$ = 10 K, and a new field-induced phase (AF+FM) is found by the magnetization measurement. We reported the (0.5 0.5 0) and (0.5 0.5 1) magnetic reflections the last time. But we was not be able to determine the magnetic structure. This time, we study Q = (0.5 0.5 0) by the horizontal magnet. In the case of Q$$perp$$H, the magnetic peak is observed, while in the case of Q$$||$$H, the magnetic peak is not observed. Using the relation of Q $$ propto$$ sin$$^{2}$$$$alpha$$, where $$alpha$$ is the angle between Q and a magnetic moment, we find that antiferromagnetic modulation component and the external field are parallel. That is, we come to a conclusion that the structure in which the magnetic moments expand and contract along the external field is stable.

Oral presentation

Magnetic form factor study of NpFeGa$$_5$$ by neutron scattering

Sugai, Takashi; Mizuno, Fumio; Jonen, Shintaro*; Kaneko, Koji; Metoki, Naoto; Haga, Yoshinori; Aoki, Dai*; Homma, Yoshiya*; Shiokawa, Yoshinobu*

no journal, , 

Np-115 compounds show various magenetic structures by changing the transision metal. NpFeGa$$_5$$ is the antiferromagnet which orders Q=(1/2 1/2 0) with two steps. Additionally NpFeGa$$_5$$ has the magnetic moment not only on Np site but also on Fe site. By analyzing the magnetic form factor, we obtained that it was possible for Fe to have the orbital magnetic moment. It is interesting because ordinarily the orbital magnetic moment of Fe is quenched.

Oral presentation

The Magnetic phase diagram and field induced ordered phase in NpIn$$_3$$

Metoki, Naoto; Kaneko, Koji; Haga, Yoshinori; Mizuno, Fumio; Sugai, Takashi; Aoki, Dai*; Homma, Yoshiya*; Shiokawa, Yoshinobu

no journal, , 

no abstracts in English

Oral presentation

New method for inelastic neutron scattering demonstrated at J-PARC

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Fujita, Masaki*; Yokoo, Tetsuya*; Arai, Masatoshi

no journal, , 

no abstracts in English

Oral presentation

Starting-up of the chopper spectrometer 4SEASONS in J-PARC

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Yokoo, Tetsuya*; Inamura, Yasuhiro; Mizuno, Fumio; Nakajima, Kenji; Takahashi, Nobuaki; Kawamura, Seiko; Maruyama, Ryuji; Soyama, Kazuhiko; et al.

no journal, , 

Oral presentation

First demonstration of multi-Ei measurement for inelastic neutron scattering

Nakamura, Mitsutaka; Kajimoto, Ryoichi; Inamura, Yasuhiro; Yokoo, Tetsuya*; Mizuno, Fumio; Fujita, Masaki*; Arai, Masatoshi

no journal, , 

We have demonstrated that a series of two-dimensional maps of a dynamical structure factor of one-dimensional antiferromagnet CuGeO$$_{3}$$ are simultaneously obtained by one measurement using the multiple incident energies. This method reduces the dead time of time-of-flight measurement, and thus, it markedly increases the measurement efficiency. Our achievement realized using the Fermi chopper spectrometer 4SEASONS in J-PARC is expected to open up new possibilities of inelastic neutron scattering measurements.

Oral presentation

New technique for inelastic neutron scattering measurement demonstrated on the chopper spectrometer 4SEASONS at J-PARC

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Yokoo, Tetsuya*; Fujita, Masaki*; Nakatani, Takeshi; Arai, Masatoshi

no journal, , 

Oral presentation

The Fermi-chopper spectrometer 4SEASONS at J-PARC

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Yokoo, Tetsuya*; Inamura, Yasuhiro; Mizuno, Fumio; Nakajima, Kenji; Takahashi, Nobuaki; Kawamura, Seiko; Maruyama, Ryuji; Soyama, Kazuhiko; et al.

no journal, , 

no abstracts in English

Oral presentation

Fermi-chopper neutron spectrometer 4SEASONS

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Yokoo, Tetsuya*; Inamura, Yasuhiro; Mizuno, Fumio; Nakajima, Kenji; Takahashi, Nobuaki; Kawamura, Seiko; Maruyama, Ryuji; Soyama, Kazuhiko; et al.

no journal, , 

no abstracts in English

Oral presentation

Inelastic neutron scattering on the iron-based superconductor LaFePO$$_{0.9}$$

Ishikado, Motoyuki*; Kodama, Katsuaki; Kajimoto, Ryoichi*; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Wakimoto, Shuichi; Iyo, Akira*; Eisaki, Hiroshi*; Arai, Masatoshi; et al.

no journal, , 

33 (Records 1-20 displayed on this page)