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Iwasa, Kazuaki*; Iga, Fumitoshi*; Moyoshi, Taketo*; Nakao, Akiko*; Ohara, Takashi
Journal of the Physical Society of Japan, 87(6), p.064705_1 - 064705_5, 2018/06
Times Cited Count：0 Percentile：0(Physics, Multidisciplinary)Shamoto, Shinichi; Ito, Takashi; Onishi, Hiroaki; Yamauchi, Hiroki; Inamura, Yasuhiro; Matsuura, Masato*; Akatsu, Mitsuhiro*; Kodama, Katsuaki; Nakao, Akiko*; Moyoshi, Taketo*; et al.
Physical Review B, 97(5), p.054429_1 - 054429_9, 2018/02
Times Cited Count：16 Percentile：65.35(Materials Science, Multidisciplinary)Nuclear and magnetic structure and full magnon dispersions of yttrium iron garnet Y
Fe
O
have been studied by neutron scattering. The lowest-energy dispersion below 14 meV exhibits a quadratic dispersion as expected from ferromagnetic magnons. The imaginary part of 
-integrated dynamical spin susceptibility 
"(
) exhibits a square-root energy-dependence in the low energies. The magnon density of state is estimated from the "() obtained on an absolute scale. The value is consistent with a single chirality mode for the magnon branch expected theoretically.
Igarashi, Masayasu*; Matsumoto, Tomohiro*; Yagihashi, Fujio*; Yamashita, Hiroshi*; Ohara, Takashi; Hanashima, Takayasu*; Nakao, Akiko*; Moyoshi, Taketo*; Sato, Kazuhiko*; Shimada, Shigeru*
Nature Communications (Internet), 8, p.140_1 - 140_8, 2017/07
Times Cited Count：25 Percentile：65.41(Multidisciplinary Sciences)Ohara, Takashi; Kiyanagi, Ryoji; Oikawa, Kenichi; Kaneko, Koji; Kawasaki, Takuro; Tamura, Itaru; Nakao, Akiko*; Hanashima, Takayasu*; Munakata, Koji*; Moyoshi, Taketo*; et al.
Journal of Applied Crystallography, 49(1), p.120 - 127, 2016/02
Times Cited Count：45 Percentile：95.65(Chemistry, Multidisciplinary)
planes of Na
CoO
yHOMoyoshi, Taketo*; Kobayashi, Yoshiaki*; Yasui, Yukio*; Sato, Masatoshi*; Kakurai, Kazuhisa
Solid State Sciences, 12(5), p.656 - 659, 2010/05
Times Cited Count：0 Percentile：0.01(Chemistry, Inorganic & Nuclear)CoO
DO; Neutron scatteringMoyoshi, Taketo*; Yasui, Yukio*; Soda, Minoru*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa
Journal of the Physical Society of Japan, 75(7), p.074705_1 - 074705_6, 2006/07
Times Cited Count：11 Percentile：56.49(Physics, Multidisciplinary)Neutron scattering investigations on single crystal NaCoO y(DO) have been carried out. Strong 2-D diffuse scattering due to the short-range ordered state of DO molecules are observed. Significant scattering has been also observed for phonons originating from the vibrations of the short-range ordered DO molecules. No firm evidence for the magnetic fluctuations has been found for the hydrated superconducting component NaCoO y(DO), while the very weak intensity modulation observed in the scans along (1/2,1/2,l) suggests the existence of the antiferromagnetic fluctuations in the non-hydrated parts of the sample.
O molecules of deuterated NaxCoO; Neutron scatteringMoyoshi, Taketo*; Yasui, Yukio*; Soda, Minoru*; Sato, Masatoshi*; Kakurai, Kazuhisa
no journal, ,
no abstracts in English
Kakurai, Kazuhisa; Matsuda, Masaaki; Ishii, Yoshinobu; Nagai, Satoshi*; Ikeda, Naoshi*; Kito, Hijiri*; Igawa, Naoki; Soda, Minoru*; Yasui, Yukio*; Moyoshi, Taketo*; et al.
no journal, ,
Two examples of neutron scattering investigations on the magnetic ordering process in frustrated spin system coupled to lattice and charge degrees of freedom are presented, in both cases leading to a short-ranged magnetic ground state. (1) In LuFeO
the Fe ions are arranged to form hexagonal double layers along the rhombohedral unique axis. Detailed investigation of the ordering process revealed a magnetic ground state with short-range order along the stacking direction. (2) YBaCoO
has a structure with alternating stacking of a kagome-like and triangular lattice formed of CoO tetrahedra. Although the Co moments do not exhibit a long range ordering down to 10K, strong diffuse scattering due to the short-range ordering of the moments on the kagome-like and triangular lattices are observed.
CoOMoyoshi, Taketo*; Yokoi, Mai*; Soda, Minoru*; Yasui, Yukio*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Igawa, Naoki; Kakurai, Kazuhisa
no journal, ,
no abstracts in English
phase diagrams of Kagom
staircase compound Co
VO
Yasui, Yukio*; Kobayashi, Yusuke*; Moyoshi, Taketo*; Soda, Minoru*; Sato, Masatoshi*; Igawa, Naoki; Kakurai, Kazuhisa
no journal, ,
no abstracts in English
CuSbO
with distorted honeycomb structureMiura, Yoko*; Yasui, Yukio*; Moyoshi, Taketo*; Sato, Masatoshi*; Kakurai, Kazuhisa
no journal, ,
Magnetic excitation spectra of NaCuSbO with the distorted honeycomb lattice structure have been investigated by means of neutron inelastic scattering. The observed dispersion of the magnetic excitation can be well understood in the framework of singlet-triplet excitation of quasi-one dimensional bond alternating system running in b-axis direction.
O; Neutron scatteringYasui, Yukio*; Sato, Kenji*; Moyoshi, Taketo*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa
no journal, ,
no abstracts in English
Kiyanagi, Ryoji; Ohara, Takashi; Kawasaki, Takuro; Oikawa, Kenichi; Kaneko, Koji; Tamura, Itaru; Nakao, Akiko*; Hanashima, Takayasu*; Munakata, Koji*; Moyoshi, Taketo*; et al.
no journal, ,
The single crystal diffractometer, SENJU, which just became open for users, is the instrument designed to perform structure analyses under multiple extreme conditions even with tiny samples. Additional six detectors and T0 chopper were installed in order to improve the data collection efficiency and the background noise arises from the burst neutron. The solid angle covarage increased by 1.2 with the six new detectors, and significant reduction of the background noises were confirmed especially on the detectors at highest and lowest angles.
Kiyanagi, Ryoji; Noda, Yukio*; Ohara, Takashi; Kawasaki, Takuro; Oikawa, Kenichi; Kaneko, Koji; Tamura, Itaru; Hanashima, Takayasu*; Moyoshi, Taketo*; Nakao, Akiko*; et al.
no journal, ,
no abstracts in English
(
= Al, Ga)Kaneko, Koji; Kawasaki, Takuro; Nakamura, Ai*; Moyoshi, Taketo*; Munakata, Koji*; Nakao, Akiko*; Hanashima, Takayasu*; Kiyanagi, Ryoji; Ohara, Takashi; Oikawa, Kenichi; et al.
no journal, ,
( = Al, Ga)Kaneko, Koji; Kawasaki, Takuro; Nakamura, Ai*; Moyoshi, Taketo*; Munakata, Koji*; Nakao, Akiko*; Hanashima, Takayasu*; Kiyanagi, Ryoji; Ohara, Takashi; Oikawa, Kenichi; et al.
no journal, ,
no abstracts in English
Ohara, Takashi; Kiyanagi, Ryoji; Kaneko, Koji; Tamura, Itaru; Nakao, Akiko*; Hanashima, Takayasu*; Munakata, Koji*; Moyoshi, Taketo*; Kuroda, Tetsuya*; Oikawa, Kenichi; et al.
no journal, ,
Ohara, Takashi; Kiyanagi, Ryoji; Kaneko, Koji; Kawasaki, Takuro; Oikawa, Kenichi; Tamura, Itaru; Nakao, Akiko*; Hanashima, Takayasu*; Munakata, Koji*; Moyoshi, Taketo*
no journal, ,
Kaneko, Koji; Ohara, Takashi; Kiyanagi, Ryoji; Kawasaki, Takuro; Oikawa, Kenichi; Tamura, Itaru; Yamauchi, Yasuhiro; Hanashima, Takayasu*; Moyoshi, Taketo*; Nakao, Akiko*; et al.
no journal, ,
Ohara, Takashi; Kiyanagi, Ryoji; Nakao, Akiko*; Hanashima, Takayasu*; Munakata, Koji*; Moyoshi, Taketo*; Kuroda, Tetsuya*; Kaneko, Koji; Tamura, Itaru; Oikawa, Kenichi; et al.
no journal, ,
