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as the origin of volume collapseYu, R.*; Hojo, Hajime*; Watanuki, Tetsu; Mizumaki, Masaichiro*; Mizokawa, Takashi*; Oka, Kengo*; Kim, H.*; Machida, Akihiko; Sakaki, Koji*; Nakamura, Yumiko*; et al.
Journal of the American Chemical Society, 137(39), p.12719 - 12728, 2015/10
Times Cited Count：35 Percentile：69.64(Chemistry, Multidisciplinary)no abstracts in English
-type giant tetragonal compound Bi
ZnVO
and its stability under pressureYu, R.*; Hojo, Hajime*; Oka, Kengo*; Watanuki, Tetsu; Machida, Akihiko; Shimizu, Keisuke*; Nakano, Kiho*; Azuma, Masaki*
Chemistry of Materials, 27(6), p.2012 - 2017, 2015/03
Times Cited Count：27 Percentile：60.95(Chemistry, Physical)no abstracts in English
Fe
O and zero-thermal expansion compositeNabetani, Koichiro*; Muramatsu, Yuya*; Oka, Kengo*; Nakano, Kiho*; Hojo, Hajime*; Mizumaki, Masaichiro*; Agui, Akane; Higo, Yuji*; Hayashi, Naoaki*; Takano, Mikio*; et al.
Applied Physics Letters, 106(6), p.061912_1 - 061912_5, 2015/02
Times Cited Count：62 Percentile：88.80(Physics, Applied)Negative thermal expansion (NTE) of BiNi
Fe
O
is investigated by dilatometric curves, synchrotron X-ray diffraction, and X-ray absorption spectroscopy. All samples (x=0.05-0.15) shows large NTE with the coefficient of linear thermal expansion which induced by charge transfer between Bi
and Ni
in the controlled temperature range near room temperature. Compared with BiLnNiO (Ln: rare-earth elements), the thermal hysteresis that causes a problem for practical application is suppressed because random distribution of Fe in the Ni site changes the first order transition to second order-like transition.
IrSiPyon, S.*; Kudo, Kazutaka*; Matsumura, Junichi*; Ishii, Hiroyuki*; Matsuo, Genta*; Nohara, Minoru*; Hojo, Hajime*; Oka, Kengo*; Azuma, Masaki*; Garlea, V. O.*; et al.
Journal of the Physical Society of Japan, 83(9), p.093706_1 - 093706_5, 2014/09
Times Cited Count：33 Percentile：81.94(Physics, Multidisciplinary)
113 of the 113th elementMorita, Kosuke*; Morimoto, Koji*; Kaji, Daiya*; Haba, Hiromitsu*; Ozeki, Kazutaka*; Kudo, Yuki*; Sumita, Takayuki*; Wakabayashi, Yasuo*; Yoneda, Akira*; Tanaka, Kengo*; et al.
Journal of the Physical Society of Japan, 81(10), p.103201_1 - 103201_4, 2012/10
Times Cited Count：171 Percentile：97.24(Physics, Multidisciplinary)An isotope of the 113th element, 113, was produced in a nuclear reaction with a 
Zn beam on a 
Bi target. We observed six consecutive 
decays following the implantation of a heavy particle in nearly the same position in the semiconductor detector, in extremely low background condition. The fifth and sixth decays are fully consistent with the sequential decays of 
Db and 
Lr both in decay energies and decay times. This indicates that the present decay chain consisted of 113, 
Rg (Z = 111), 
Mt (Z = 109), 
Bh (Z = 107), Db (Z = 105), and Lr (Z = 103) with firm connections. This result, together with previously reported results from 2004 and 2007, conclusively leads the unambiguous production and identification of the isotope 113, of the 113th element.
induced by intermetallic charge transferAzuma, Masaki*; Chen, W.*; Seki, Hayato*; Czapski, M.*; Olga, S.*; Oka, Kengo*; Mizumaki, Masaichiro*; Watanuki, Tetsu; Ishimatsu, Naoki*; Kawamura, Naomi*; et al.
Nature Communications (Internet), 2, p.347_1 - 347_5, 2011/06
Times Cited Count：377 Percentile：99.12(Multidisciplinary Sciences)no abstracts in English
Matsuda, Keiko*; Nishioka, Takaaki*; Kinoshita, Kengo*; Kawabata, Takeshi*; Go, Nobuhiro
Protein Science, 12(10), p.2239 - 2251, 2003/10
Times Cited Count：10 Percentile：16.95(Biochemistry & Molecular Biology)no abstracts in English
Watanuki, Tetsu; Mizumaki, Masaichiro*; Kim, H.*; Yu, R.*; Machida, Akihiko; Sakaki, Koji*; Nakamura, Yumiko*; Oka, Kengo*; Azuma, Masaki*
no journal, ,
no abstracts in English
PbNiONakano, Kiho*; Nabetani, Koichiro*; Azuma, Masaki*; Oka, Kengo*; Mizumaki, Masaichiro*; Agui, Akane; Ueda, Shigenori*
no journal, ,
no abstracts in English
SrCrOYu, R.*; Oka, Kengo*; Hojo, Hajime*; Mizumaki, Masaichiro*; Agui, Akane; Mori, Daisuke*; Inaguma, Yoshiyuki*; Azuma, Masaki*
no journal, ,
no abstracts in English
SrCrOYu, R.*; Oka, Kengo*; Hojo, Hajime*; Azuma, Masaki*; Mizumaki, Masaichiro*; Agui, Akane; Inaguma, Yoshiyuki*; Mori, Daisuke*
no journal, ,
no abstracts in English
Watanuki, Tetsu; Machida, Akihiko; Kim, H.*; Sakaki, Koji*; Nakamura, Yumiko*; Yu, R.*; Azuma, Masaki*; Oka, Kengo*; Mizumaki, Masaichiro*
no journal, ,
no abstracts in English
Matsubara, Shinichiro*; Imaoka, Kengo*; Ikarimoto, Iwao*; Ogawa, Shinta*; Eto, Masao*; Kawasaki, Nobuchika
no journal, ,
Core assemblies installed in the core vessel deform during the normal operation due to swellings and irradiation creep. Insertability of core assemblies during fuel exchanges was studied with consideration of this deformation.
