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Shamoto, Shinichi; Yasui, Yukio*; Matsuura, Masato*; Akatsu, Mitsuhiro*; Kobayashi, Yoshiaki*; Nemoto, Yuichi*; Ieda, Junichi
Physical Review Research (Internet), 2(3), p.033235_1 - 033235_6, 2020/08
Ultralow energy magnon in yttrium iron garnet crystal has been studied by inelastic neutron scattering in an energy range from 10 to 45 eV. When a magnetic field of about 0.1 T is applied along [111], ultralow energy magnon anomaly is found at 10 K.
Yamauchi, Hiroki; Sari, D. P.*; Watanabe, Isao*; Yasui, Yukio*; Chang, L.-J.*; Kondo, Keietsu; Ito, Takashi; Ishikado, Motoyuki*; Hagihara, Masato*; Frontzek, M. D.*; et al.
Communications Materials (Internet), 1, p.43_1 - 43_6, 2020/07
High-temperature short-range order is discovered up to 720 K in MnRhSi by complementary use of neutron scattering and muon spin relaxation measurements.
Ueda, Hiroshi*; Onoda, Shigeki*; Yamaguchi, Yasuhiro*; Kimura, Tsuyoshi*; Yoshizawa, Daichi*; Morioka, Toshiaki*; Hagiwara, Masayuki*; Hagihara, Masato*; Soda, Minoru*; Masuda, Takatsugu*; et al.
Physical Review B, 101(14), p.140408_1 - 140408_6, 2020/04
Times Cited Count:2 Percentile:16.85(Materials Science, Multidisciplinary)Yasui, Yukio*; Igawa, Naoki; Kakurai, Kazuhisa
JPS Conference Proceedings (Internet), 8, p.034012_1 - 034012_6, 2015/09
Magnetic structure has been studied by using neutron diffraction for quasi one-dimensional quantum spin system LiZrCuO
with CuO
ribbon chains. The CuO
ribbon system Li
ZrCuO
exhibits the antiferromagnetic transition at T
7 K, however, the magnetic transition is not accompanied with ferroelectricity. At 3K, we observed magnetic superlattice reflections at Q = (0, k, l
) and (h, 0, l
) (h, k and l = even) with
0.488 by the powder neutron diffraction. By the combined studies of neutron diffraction and magnetization data, the magnetic structure of Li
ZrCuO
is proposed. On the bases of the obtained data, reasons for absence of ferroelectricity in Li
ZrCuO
are discussed.
Asai, Shinichiro*; Okazaki, Ryuji*; Terasaki, Ichiro*; Yasui, Yukio*; Igawa, Naoki; Kakurai, Kazuhisa
JPS Conference Proceedings (Internet), 3, p.014034_1 - 014034_6, 2014/06
We have carried out the neutron scattering measurements for a single crystal of LaCoRh
O
in order to investigate the ferromagnetic ordering induced by Rh
substitution for Co
of LaCoO
. The ordered moment is evaluated to be 0.4
0.2
, which is consistent with the saturation magnetization of LaCo
Rh
O
. It indicates that the ferromagnetic ordering of LaCo
Rh
O
originates from the short-range ferromagnetic ordering disordered by Rh
ions.
Asai, Shinichiro*; Okazaki, Ryuji*; Terasaki, Ichiro*; Yasui, Yukio*; Kobayashi, Wataru*; Nakao, Akiko*; Kobayashi, Kensuke*; Kumai, Reiji*; Nakao, Hironori*; Murakami, Yoichi*; et al.
Journal of the Physical Society of Japan, 82(11), p.114606_1 - 114606_6, 2013/11
Times Cited Count:6 Percentile:44.56(Physics, Multidisciplinary)Neutron and synchrotron X-ray diffraction for LaCo Rh
O
have been carried out in order to investigate the structural properties related with the spin state of Co
ions. We have found that the values of the Co(Rh)-O bond lengths in the Co(Rh)O
octahedron of LaCo
Rh
O
are nearly identical at 10 K. The lattice volume for the Rh
substituted samples decreases with the thermal expansion coefficient similar to that of LaCoO
from room temperature, and ceases to decrease around 70 K. These experimental results favor a mixed state consisting of the high-spin state and low-spin state Co
ions, and suggest that the high-spin state Co
ions are thermally excited in addition to those pinned by the substituted Rh
ions.
Chang, L.-J.*; Onoda, Shigeki*; Su, Y.*; Kao, Y.-J.*; Tsuei, K.-D.*; Yasui, Yukio*; Kakurai, Kazuhisa; Lees, M. R.*
Nature Communications (Internet), 3, p.992_1 - 992_7, 2012/08
Times Cited Count:162 Percentile:97.41(Multidisciplinary Sciences)Moyoshi, 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)Moyoshi, 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:56.76(Physics, Multidisciplinary)Neutron scattering investigations on single crystal NaCoO
y(D
O) have been carried out. Strong 2-D diffuse scattering due to the short-range ordered state of D
O molecules are observed. Significant scattering has been also observed for phonons originating from the vibrations of the short-range ordered D
O molecules. No firm evidence for the magnetic fluctuations has been found for the hydrated superconducting component Na
CoO
y(D
O), 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.
Ino, Akihiro*; Okane, Tetsuo; Fujimori, Shinichi; Fujimori, Atsushi; Mizokawa, Takashi*; Yasui, Yukio*; Nishikawa, Takashi*; Sato, Masatoshi*
Physical Review B, 69(19), p.195116_1 - 195116_8, 2004/05
Times Cited Count:6 Percentile:34.38(Materials Science, Multidisciplinary)no abstracts in English
Soda, Minoru*; Yasui, Yukio*; Ito, Masafumi*; Iikubo, Satoshi*; Sato, Masatoshi*; Kakurai, Kazuhisa
Journal of the Physical Society of Japan, 73(2), p.464 - 468, 2004/02
Times Cited Count:41 Percentile:81.63(Physics, Multidisciplinary)no abstracts in English
Ito, Masafumi*; Yasui, Yukio*; Iikubo, Satoshi*; Soda, Minoru*; Sato, Masatoshi*; Kobayashi, Akito*; Kakurai, Kazuhisa
Journal of the Physical Society of Japan, 72(7), p.1627 - 1630, 2003/07
Times Cited Count:9 Percentile:52.98(Physics, Multidisciplinary)no abstracts in English
Soda, Minoru*; Yasui, Yukio*; Fujita, Toshiaki*; Miyashita, Takeshi*; Sato, Masatoshi*; Kakurai, Kazuhisa
Journal of the Physical Society of Japan, 72(7), p.1729 - 1734, 2003/07
Times Cited Count:76 Percentile:90.57(Physics, Multidisciplinary)no abstracts in English
Iikubo, Satoshi*; Yasui, Yukio*; Oda, Keisuke*; Ono, Yohei*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa
Journal of the Physical Society of Japan, 71(11), p.2792 - 2799, 2002/11
Times Cited Count:11 Percentile:57.18(Physics, Multidisciplinary)no abstracts in English
Yasui, Yukio*; Kanada, Masaki*; Ito, Masafumi*; Harashina, Hiroshi*; Sato, Masatoshi*; Okumura, H.*; Kakurai, Kazuhisa; Kadowaki, Hiroaki*
Journal of the Physical Society of Japan, 71(2), p.599 - 606, 2002/02
Times Cited Count:80 Percentile:90.24(Physics, Multidisciplinary)no abstracts in English
Moyoshi, 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) YBaCo
O
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.
Moyoshi, Taketo*; Yokoi, Mai*; Soda, Minoru*; Yasui, Yukio*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Igawa, Naoki; Kakurai, Kazuhisa
no journal, ,
no abstracts in English
Miura, Yoko*; Yasui, Yukio*; Sato, Masatoshi*; Igawa, Naoki; Kakurai, Kazuhisa
no journal, ,
no abstracts in English
Yasui, Yukio*; Kobayashi, Yusuke*; Moyoshi, Taketo*; Soda, Minoru*; Sato, Masatoshi*; Igawa, Naoki; Kakurai, Kazuhisa
no journal, ,
no abstracts in English