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Yamauchi, Hiroki; Metoki, Naoto; Watanuki, Ryuta*; Suzuki, Kazuya*; Fukazawa, Hiroshi; Chi, S.*; Fernandez-Baca, J. A.*
Journal of the Physical Society of Japan, 86(4), p.044705_1 - 044705_9, 2017/04
Times Cited Count：13 Percentile：64.28(Physics, Multidisciplinary)Neutron diffraction experiments have been carried out to characterize the magnetic structures and order parameters in an intermediate phase of NdB showing the successive phase transitions at 
K, 
K, and 
K. The observed patterns in phase II (
) are successfully explained by postulating a planar structure with static magnetic moments in the tetragonal 
-plane. We have found that the magnetic structure in phase II can be uniquely determined to be a linear combination of noncolinear "all-in/all-out"-type and "vortex"-type antiferromagnetic structures. We propose that the quadrupolar interaction holds the key to stabilizing the noncollinear magnetic structure and quadrupolar order. Here, the frustration in the Shastry - Sutherland lattice would play an essential role in suppressing the dominance of the magnetic interaction.
Xu, P. G.; Akita, Koichi; Suzuki, Hiroshi; Metoki, Naoto; Moriai, Atsushi
Materials Transactions, 53(11), p.1831 - 1836, 2011/11
Times Cited Count：6 Percentile：37.98(Materials Science, Multidisciplinary)Masuda, Takatsugu*; Kitaoka, Shuji*; Takamizawa, Satoshi*; Metoki, Naoto; Kaneko, Koji; Rule, K. C.*; Kiefer, K.*; Manaka, Hiroshi*; Nojiri, Hiroyuki*
Physical Review B, 81(10), p.100402_1 - 100402_4, 2010/00
Times Cited Count：42 Percentile：81.37(Materials Science, Multidisciplinary)Spin dynamics of the square lattice Heisenberg antiferromagnet, Ba
MnGeO
, is studied by a combination of bulk measurements, neutron diffraction, and inelastic neutron-scattering techniques. Easy plane type antiferromagnetic order is identified at T
4.0 K. The exchange interactions are estimated as 
= 27.8(3) 
eV and
= 1.0(1) eV, and the saturation field 
is 9.75 T. Magnetic excitation measurements with high experimental resolution setup by triple axis neutron spectrometer reveals the instability of one magnon excitation in the field range of 0.7 
0.85.
Sumiyoshi, Kosuke*; Yamada, Shoichi*; Suzuki, Hideyuki*; Shen, H.*; Chiba, Satoshi; Toki, Hiroshi*
Astrophysical Journal, 629(2, Part1), p.922 - 932, 2005/08
Times Cited Count：228 Percentile：97.41(Astronomy & Astrophysics)no abstracts in English
Yamada, Hirokazu*; Kawamura, Hiroshi; Tsuchiya, Kunihiko; Ishitsuka, Etsuo; Uchida, Munenori*; Akutsu, Yoichi; Motoki, Ryozo; Watanabe, Wataru; Hirata, Shogo*
JAERI-Tech 2004-036, 138 Pages, 2004/03
JAERI-Tech-2004-036.pdf:4.07MB
This document shows the model case concerned with the utilization of constructed facility for the construction of post irradiation examination facility for fusion blanket. In this report, the radioisotope application and development laboratory is considered as constructed facility for post irradiation examination facility and we planned to improve the radioisotope application and development laboratory to the facility of post irradiation examination for fusion material to reduce the construction fee for this facility and promotion of efficiency by concentration of any equipment for fusion material research.
Fukushima, Masahiro; Ilgenfriz, E. -M.*; Toki, Hiroshi*
Physical Review D, 64(3), p.034503_1 - 034503_9, 2001/08
Times Cited Count：7 Percentile：39.32(Astronomy & Astrophysics)no abstracts in English
Yamamoto, Shin; Ohara, Yoshihiro; Tani, Keiji; Nishio, Satoshi; Okumura, Yoshikazu; Araki, Masanori; Azumi, Masafumi; R.S.Devoto*; Fujisawa, Noboru; Hitoki, Shigehisa*; et al.
JAERI-M 88-086, 183 Pages, 1988/05
no abstracts in English
Mizoguchi, Tadanori*; *; Fujisawa, Noboru; Abe, Tetsuya; Hirayama, Toshio; Hitoki, Shigehisa*; *; Koide, Yoshihiko; *; *; et al.
JAERI-M 88-045, 126 Pages, 1988/03
no abstracts in English
Shin, Sumio*; Sato, Kiichi*; Nishida, Hiroshi*; Sakamoto, Shoichi*; Yamabayashi, Hisamichi; Motoki, Ryozo; Terunuma, Kusuo; Yamamoto, Takeo
Igaku No Ayumi, 140(1), p.51 - 52, 1987/01
Trace elements serve as key components of enzyme systems and have especially important correlation with fetal maturity.
Cr; ; Motoki, Ryozo; Yamamoto, Takeo; Nishida, Hiroshi*; Shin, Sumio*; Sato, Kiichi*; *
Radioisotopes, 34(3), p.144 - 150, 1985/00
no abstracts in English
CrShin, Sumio*; ; *; Nishida, Hiroshi*; ; ; Motoki, Ryozo
Igaku No Ayumi, 130(6-7), p.437 - 439, 1984/00
no abstracts in English
Mo
O
Kuroe, Haruhiko*; Hamasaki, Tomoyuki*; Hase, Masashi*; Kaneko, Koji; Metoki, Naoto; Matsuda, Masaaki; Kakurai, Kazuhisa; Oka, Kunihiko*; Ito, Toshimitsu*; Eisaki, Hiroshi*
no journal, ,
We have measured inelastic neutron scattering in CuMoO to study its magnetic-excitation dispersion curves. This material can be treated as a complex of the following two spin subsystems. (1) Quasi-one-dimensional antiferromagnetic (AF) spin chain with the intrachain interaction pJ4 = 6.3 meV, where p is the renormalization factor depending on the system dimension, together with the ferromagnetic and AF interchain interactions -Ja = J 0.01pJ4. (2) AF spin dimers with the interaction J3 = 5.8 meV. The hybridization parameter, representing the intersubsystem interaction between these subsystems, is estimated as Eint sin (k), where Eint = 1.6 meV. The modulation of the molecular field generated by the spin precession in the excited state of the quasi-one-dimensional spin chain plays an important role in this hybridization.
Xu, P. G.; Suzuki, Hiroshi; Metoki, Naoto; Shiota, Yoshinori; Suzuki, Tetsuya*; Yin, F. X.*; Akita, Koichi
no journal, ,
It is well known that the neutron diffraction is suitable to evaluate the crystallographic textures of various bulk materials while the measured texture results are partially dependent on the diffractometer used. Since JAEA has several neutron diffractometers for texture measurement, including RESA, RESA-II and MUSASI (JAEA), the quantitative comparison among bulk textures of several selected samples is helpful to further optimize the measurement conditions and ensure the users to get reliable results. By proper selection of neutron beam size and collimator size, the evaluation reliability of MUSASI was improved so that it may be utilized to reliably measure neutron textures of various materials.
Xu, P. G.; Vogel, S. C.*; Suzuki, Hiroshi; Metoki, Naoto; Nambu, Shoichi*; Inoue, Junya*; Akita, Koichi
no journal, ,
The crystallographic textures of high strength austenite-martensite laminated steel were measured with different neutron diffractometers. The comparison of orientation distribution functions (ODFs) showed that the Gaussian integrated intensities obtained from partially overlapping peaks were reliable to calculate the multiphase textures. Collimator optimized parallel neutron beam and good background correction enabled peak maximum intensities from non-overlapping peaks suitable to evaluate the multiphase textures.
Xu, P. G.; Suzuki, Hiroshi; Metoki, Naoto; Akita, Koichi; Vogel, S. C.*; Nambu, Shoichi*; Inoue, Junya*
no journal, ,
Xu, P. G.; Suzuki, Hiroshi; Akita, Koichi; Moriai, Atsushi; Metoki, Naoto
no journal, ,
