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Taira, Yoshitaka*; Endo, Shunsuke; Kawamura, Shiori*; Nambu, Taro*; Okuizumi, Mao*; Shizuma, Toshiyuki*; Omer, M.; Zen, H.*; Okano, Yasuaki*; Kitaguchi, Masaaki*
Physical Review A, 107(6), p.063503_1 - 063503_10, 2023/06
Times Cited Count：0 Percentile：0.01(Optics)no abstracts in English
PdSi
Hirschberger, M.*; Nakajima, Taro*; Kriener, M.*; Kurumaji, Takashi*; Spitz, L.*; Gao, S.*; Kikkawa, Akiko*; Yamasaki, Yuichi*; Sagayama, Hajime*; Nakao, Hironori*; et al.
Physical Review B, 101(22), p.220401_1 - 220401_6, 2020/06
Times Cited Count：40 Percentile：91.4(Materials Science, Multidisciplinary)
-rays after neutron capture by 
La for a T-violation searchOkudaira, Takuya; Shimizu, Hirohiko*; Kitaguchi, Masaaki*; Hirota, Katsuya*; Haddock, C. C.*; Ito, Ikuya*; Yamamoto, Tomoki*; Endo, Shunsuke*; Ishizaki, Kohei*; Sato, Takumi*; et al.
EPJ Web of Conferences, 219, p.09001_1 - 09001_6, 2019/12
Parity violating effects enhanced by up to 10
times have been observed in several neutron induced compound nuclei. There is a theoretical prediction that time reversal (T) violating effects can also be enhanced in these nuclei implying that T-violation can be searched for by making very sensitive measurements. However, the enhancement factor has not yet been measured in all nuclei. The angular distribution of the (n,) reaction was measured with La by using a germanium detector assembly at J-PARC, and the enhancement factor was obtained. From the result, the measurement time to achieve the most sensitive T-violation search was estimated as 1.4 days, and a 40% polarized La target and a 70% polarized 
He spin filter whose thickness is 70 atm
cm are needed. Therefore high quality He spin filter is developed in JAEA. The measurement result of the (n,) reaction at J-PARC and the development status of the He spin filter will be presented.
Strasser, P.*; Abe, Mitsushi*; Aoki, Masaharu*; Choi, S.*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Katsuhiko*; et al.
EPJ Web of Conferences, 198, p.00003_1 - 00003_8, 2019/01
Times Cited Count：13 Percentile：98.93(Quantum Science & Technology)Nakajima, Taro*; Inamura, Yasuhiro; Ito, Takayoshi*; Oishi, Kazuki*; Oike, Hiroshi*; Kagawa, Fumitaka*; Kikkawa, Akiko*; Taguchi, Yasujiro*; Kakurai, Kazuhisa*; Tokura, Yoshinori*; et al.
Physical Review B, 98(1), p.014424_1 - 014424_5, 2018/07
Times Cited Count：7 Percentile：34.24(Materials Science, Multidisciplinary)We investigated the phase-transition kinetics of magnetic skyrmion lattice (SkL) in MnSi by means of stroboscopic small-angle neutron scattering (SANS). Temporal evolutions of SANS patterns were measured with time resolution of 13 ms while sweeping temperature as fast as 50 Ks
. It turned out that the paramagnetic-to-SkL transition immediately occurs upon traversing the equilibrium phase boundary on the rapid cooling, whereas the SkL-to-conical transition can be kinetically avoided to realize the low-temperature metastable SkL with a long-range magnetic order. The formation of the metastable SkL was found to be strongly dependent not only on cooling rate, but also on magnetic eld and trajectory in the H-T phase diagram.
rays from neutron-induced compound states of 
LaOkudaira, Takuya*; Takada, Shusuke*; Hirota, Katsuya*; Kimura, Atsushi; Kitaguchi, Masaaki*; Koga, Jun*; Nagamoto, Kosuke*; Nakao, Taro*; Okada, Anju*; Sakai, Kenji; et al.
Physical Review C, 97(3), p.034622_1 - 034622_15, 2018/03
Times Cited Count：13 Percentile：70.79(Physics, Nuclear)-rays at the ANNRI in the MLF of the J-PARCTakada, Shusuke*; Okudaira, Takuya*; Goto, Fumiya*; Hirota, Katsuya*; Kimura, Atsushi; Kitaguchi, Masaaki*; Koga, Jun*; Nakao, Taro*; Sakai, Kenji; Shimizu, Hirohiko*; et al.
Journal of Instrumentation (Internet), 13(2), p.P02018_1 - P02018_21, 2018/02
Times Cited Count：6 Percentile：30.66(Instruments & Instrumentation)To, Kentaro; Nakamura, Tatsuya; Sakasai, Kaoru; Soyama, Kazuhiko; Hino, Masahiro*; Kitaguchi, Masaaki*; Yamagishi, Hideshi*
Nuclear Instruments and Methods in Physics Research A, 726, p.169 - 174, 2013/10
Times Cited Count：9 Percentile：57.33(Instruments & Instrumentation)A multiwire-type two-dimensional neutron detector system with a sensitive area of 128 
128 mm
is developed for use in the Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex. The system can achieve a short response time and high spatial resolution using the individual line readout method. Optical devices have been incorporated in the system for long-distance signal transmission and insulation between a detector head in the neutron shielding and signal processing circuits in the data acquisition room. The detector system exhibits a pulse-pair resolution of 1 
s, an average spatial resolution of less than 2 mm full width at half-maximum in the sensitive region, and a two-dimensional homogeneity of 8.3% in all pixels.
Seki, Miharu*; Oikawa, Junichi*; Taguchi, Taro*; Onuki, Toshihiko; Muramatsu, Yasuyuki*; Sakamoto, Kazunori*; Amachi, Seigo*
Environmental Science & Technology, 47(1), p.390 - 397, 2013/01
Times Cited Count：44 Percentile：75.12(Engineering, Environmental)The laccase released by microorganisms oxidizes iodide to molecular iodine or hypoiodous acid, both of which are easily incorporated into natural soil organic matter.
Ba
MnOSakai, Hideaki*; Fujioka, Jun*; Fukuda, Tatsuo; Bahramy, M. S.*; Okuyama, Daisuke*; Arita, Ryotaro*; Arima, Takahisa*; Baron, A. Q. R.*; Taguchi, Yasujiro*; Tokura, Yoshinori*
Physical Review B, 86(10), p.104407_1 - 104407_11, 2012/09
Times Cited Count：30 Percentile：74.57(Materials Science, Multidisciplinary)-ray irradiated organic thin film transistors based on perfluoropentacene with polyimide gate insulatorTakayanagi, Yutaro*; Ouchi, Hirokuni*; Duan, Z.*; Okukawa, Takanori*; Yanagi, Yuichiro*; Yoshida, Akira*; Taguchi, Mitsumasa; Hirao, Toshio; Nishioka, Yasushiro*
Journal of Photopolymer Science and Technology, 25(4), p.493 - 496, 2012/08
Times Cited Count：0 Percentile：0.01(Polymer Science)Organic thin film fields effect transistors are expected to be used in spacecrafts/satellites because they can realize large-size, mechanical flexibility, light weight and low-cost devices. N-channel field effect transistors with a Si/polyimide(PI)/perfluoropentacene/Au structure were fabricated, and irradiated with -ray from Co source. The changes of the drain current vs. source/drain voltage characteristics were measured after every 200 Gy in silicon Gy(Si) irradiations up to the total dose of 1200 Gy(Si). The drain current gradually increased up to the total dose of 1200 Gy(Si). The threshold voltage decreased up to 400 Gy(Si), and gradually recovered above 600 Gy(Si). The mobility was almost unchanged up to 1200 Gy(Si). Those behaviors were explained by accumulation of positive trapped charge within the gate insulator PI near the interface. Evidence for the accumulation of interface traps was hardly observed.
Taguchi, Yasujiro*; Sakai, Hideaki*; Okuyama, Daisuke*; Ishiwata, Shintaro*; Fujioka, Jun*; Fukuda, Tatsuo; Hashizume, Daisuke*; Kagawa, Fumitaka*; Takahashi, Yoichiro*; Shimano, Ryo*; et al.
Physica B; Condensed Matter, 407(11), p.1685 - 1688, 2012/06
Times Cited Count：5 Percentile：23.87(Physics, Condensed Matter)
-type hexaferrites with a room-temperature conical state and magnetically controllable spin helicityTokunaga, Yusuke*; Kaneko, Yoshio*; Okuyama, Daisuke*; Ishiwata, Shintaro*; Arima, Takahisa*; Wakimoto, Shuichi; Kakurai, Kazuhisa; Taguchi, Yasujiro*; Tokura, Yoshinori*
Physical Review Letters, 105(25), p.257201_1 - 257201_4, 2010/12
Times Cited Count：269 Percentile：98.33(Physics, Multidisciplinary)
MgFe
O
Ishiwata, Shintaro*; Okuyama, Daisuke*; Kakurai, Kazuhisa; Nishi, Masakazu*; Taguchi, Yasujiro*; Tokura, Yoshinori*
Physical Review B, 81(17), p.174418_1 - 174418_8, 2010/05
Times Cited Count：77 Percentile：91.32(Materials Science, Multidisciplinary)
Taguchi, Chiho; Taura, Futoshi*; Tamada, Taro; Shoyama, Yoshinari; Shoyama, Yukihiro*; Tanaka, Hiroyuki*; Kuroki, Ryota; Morimoto, Satoshi*
Acta Crystallographica Section F, 64(3), p.217 - 220, 2008/03
Times Cited Count：3 Percentile：35.91(Biochemical Research Methods)Correia, J, B.*; Livramento, V.*; Shohoji, Nobumitsu*; Tresso, E.*; Yamamoto, Kazunori; Taguchi, Tomitsugu; Hanada, Kotaro*; Osawa, Eiji*
Materials Science Forum, 587-588, p.443 - 447, 2008/00
Nanostructured metals and nanocomposites are ways to address the low hardness problem, provided the nanostructured material is thermally stable during processing and service. In the present research, Cu composite powders, with 5 to 30 at % nanodiamond, were consolidated into bulk samples. The copper-nanodiamond composite powders were vacuum encapsulated and extruded at 600 
C. A significant proportion of the initial hardness in the powders is retained after extrusion. Transmission electron microscopy of the extruded material indicates good bonding between the nanodiamond particles and the copper matrix. Raman spectroscopy on the consolidated samples evidences the presence of graphite, possibly due to partial disintegration of ultradisperse nanodiamond agglomerates.
Yamamoto, Kazunori; Taguchi, Tomitsugu; Hanada, Kotaro*; Osawa, Eiji*; Inakuma, Masayasu*; Livramento, V.*; Correia, J, B.*; Shohoji, Nobumitsu*
Diamond and Related Materials, 16(12), p.2058 - 2062, 2007/12
Times Cited Count：6 Percentile：31.25(Materials Science, Multidisciplinary)Nano-sized polymorphs of carbon continue to attract much attention of scientists and provide new targets of examination with transmission electron microscope (TEM). We present here TEM images of a number of nanocarbons which played critical roles in some stage of their R&D, such as mechanical alloying of Cu and nanodiamond, diamond from soot, and short carbon nanocylinders by milling with microbeads. Emphasis is placed on nanodiamonds.
Hanada, Kotaro*; Yamamoto, Kazunori; Taguchi, Tomitsugu; Osawa, Eiji*; Inakuma, Masayasu*; Livramento, V.*; Correia, J, B.*; Shohoji, Nobumitsu*
Diamond and Related Materials, 16(12), p.2054 - 2057, 2007/12
Times Cited Count：26 Percentile：70.34(Materials Science, Multidisciplinary)This paper describes the microstructures and mechanical properties of Cu nanocomposites containing 0-30 at% diamond nanoparticles. The Cu nanocomposite powders are fabricated by mechanical milling method and are consolidated by spark plasma sintering and hot extrusion. Microstructural observation shows that the homogeneous distribution of diamond nanoparticles in the Cu nanocomposite can be achieved by extrusion with large plastic deformation, in spite of 20 at% diamond content, and that the nanocomposite with homogeneous distribution of diamond nanoparticles has ultra-fine grain structure, approximately 50 nm. Vickers hardness and compression tests on the SPS-consolidated and hot-extruded samples show that the detonation nanodiamond dispersed homogeneously in the Cu matrix enhances the mechanical properties.
Ise, Hideo*; Izaki, Makoto*; Oishi, Haruo*; Mori, Seiji*; Ako, Kentaro*; Moriyama, Hisashi*; Kagaya, Hiroaki*; Kobayashi, Masami*; Taguchi, Ko*; Shibanuma, Kiyoshi
FAPIG, (159), p.10 - 14, 2001/11
no abstracts in English
Hiratsuka, Hiroshi*; Okamoto, Takahiro*; Kuroda, Satoshi*; Okutsu, Tetsuo*; Maeoka, Hironori*; Taguchi, Mitsumasa; Yoshinaga, Tetsutaro*
Research on Chemical Intermediates, 27(1-2), p.137 - 153, 2001/02
Times Cited Count：9 Percentile：18.42(Chemistry, Multidisciplinary)no abstracts in English
