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Journal Articles

Continuum excitation and pseudospin wave in quantum spin-liquid and quadrupole ordered states of Tb$$_{2+x}$$Ti$$_{2-x}$$O$$_{7+y}$$

Kadowaki, Hiroaki*; Wakita, Mika*; F${aa}$k, B.*; Ollivier, J.*; Kawamura, Seiko; Nakajima, Kenji; Takatsu, Hiroshi*; Tamai, Mototake*

Journal of the Physical Society of Japan, 87(6), p.064704_1 - 064704_6, 2018/06

 Times Cited Count:9 Percentile:57.38(Physics, Multidisciplinary)

The ground states of the frustrated pyrochlore oxide Tb$$_{2+x}$$Ti$$_{2-x}$$O$$_{7+y}$$ have been studied by inelastic neutron scattering experiments. Three single-crystal samples are investigated; one shows no phase transition ($$x = -0.007 < x_{c} < sim -0.0025$$), being a putative quantum spin-liquid (QSL), and the other two ($$x = 0.000, 0.003$$) show electric quadrupole ordering (QO) below $$T_{c} sim 0.5$$ K. The QSL sample shows continuum excitation spectra with an energy scale 0.1 meV as well as energy-resolution-limited (nominally) elastic scattering. As $$x$$ is increased, pseudospin wave of the QO state emerges from this continuum excitation, which agrees with that of powder samples and consequently verifies good $$x$$ control for the present single crystal samples.

Journal Articles

Oxygen hole state in A-site ordered perovskite ACu$$_3$$Ru$$_4$$O$$_{12}$$ (A = Na, Ca, and La) probed by resonant X-ray emission spectroscopy

Mizumaki, Masaichiro*; Mizokawa, Takashi*; Agui, Akane; Tanaka, Sotaro*; Takatsu, Hiroshi*; Yonezawa, Shingo*; Maeno, Yoshiteru*

Journal of the Physical Society of Japan, 82(2), p.024709_1 - 024709_6, 2013/02

 Times Cited Count:9 Percentile:53.63(Physics, Multidisciplinary)

In this study, we report the O 1$$s$$ and Cu 2$$p$$ X-ray absorption spectroscopy (XAS) and resonant X-ray emission spectroscopy (RXES) study on the A-site ordered perovskite ACu$$_3$$Ru$$_4$$O$$_{12}$$ (A = Na, Ca, and La). Hartree-Fock calculation and cluster model calculation were carried out to analyze O 1$$s$$ and Cu 2$$p$$ XAS spectra. The O 1$$s$$ RXES spectra indicate that the number of O 2$$p$$ holes increases in going from La to Ca to Na. In addition, the Cu 2$$p$$ RXES spectra reveal that the charge-transfer energy decreases in going from La to Ca to Na.

Journal Articles

Introduction to plasma fusion energy

Takamura, Shuichi*; Kado, Shinichiro*; Fujii, Takashi*; Fujiyama, Hiroshi*; Takabe, Hideaki*; Adachi, Kazuo*; Morimiya, Osamu*; Fujimori, Naoji*; Watanabe, Takayuki*; Hayashi, Yasuaki*; et al.

Kara Zukai, Purazuma Enerugi No Subete, P. 164, 2007/03

no abstracts in English

Journal Articles

Development of ceramic breeder blankets in Japan

Takatsu, Hideyuki; Kawamura, Hiroshi; Tanaka, Satoru*

Fusion Engineering and Design, 39-40, p.645 - 650, 1998/09

 Times Cited Count:17 Percentile:77.77(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Ceramic breeding blanket development for experimental fusion reactor in JAERI

Kurasawa, Toshimasa; Takatsu, Hideyuki; Sato, Satoshi; Mori, Seiji*; Hashimoto, T.*; Nakahira, Masataka; Furuya, Kazuyuki; Tsunematsu, Toshihide; Seki, Masahiro; Kawamura, Hiroshi; et al.

Fusion Engineering and Design, 27, p.449 - 456, 1995/00

 Times Cited Count:7 Percentile:59.17(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Design and R&D activities on ceramic breeder blanket for fusion experimental reactors in JAERI

Kurasawa, Toshimasa; Takatsu, Hideyuki; Sato, Satoshi; Nakahira, Masataka; Furuya, Kazuyuki; Hashimoto, T.*; Kawamura, Hiroshi; Kuroda, Toshimasa*; Tsunematsu, Toshihide; Seki, Masahiro

Fusion Technology 1994, Vol.2, 0, p.1233 - 1236, 1995/00

no abstracts in English

Journal Articles

Layered pebble bed concept for ITER breeding blanket

Takatsu, Hideyuki; Mori, Seiji*; Yoshida, Hiroshi; Hashimoto, T.*; Kurasawa, Toshimasa; Koizumi, Koichi; Enoeda, Mikio; Sato, Satoshi; Kuroda, Toshimasa*; *; et al.

Fusion Technology 1992, p.1504 - 1508, 1993/00

no abstracts in English

JAEA Reports

Beryllium data base for in-pile mockup test on blanket of fusion reactor, 1

Kawamura, Hiroshi; *; Ishitsuka, Etsuo; *; Takatsu, Hideyuki

JAERI-M 92-190, 131 Pages, 1992/11

JAERI-M-92-190.pdf:2.83MB

no abstracts in English

Journal Articles

Primary research and development needs for fusion experimental reactors; Perspectives

Shibanuma, Kiyoshi; Matsuda, Shinzaburo; Tsuji, Hiroshi; Kimura, Haruyuki; Ohara, Yoshihiro; Seki, Yasushi; Tada, Eisuke; Takatsu, Hideyuki; Tanaka, Shigeru; Yoshida, Hiroshi; et al.

Fusion Engineering and Design, 15, p.377 - 385, 1992/00

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Japanese contributions to blanket design for ITER

Kuroda, Toshimasa*; Yoshida, Hiroshi; Takatsu, Hideyuki; Seki, Yasushi; Noda, Kenji; Watanabe, H.; Koizumi, Koichi; Nishio, Satoshi; *; *; et al.

JAERI-M 91-133, 191 Pages, 1991/08

JAERI-M-91-133.pdf:5.79MB

no abstracts in English

JAEA Reports

Conceptual design of Fusion Experimental Reactor; Safety analysis and evaluation

Seki, Yasushi; Takatsu, Hideyuki; Iida, Hiromasa; *; Ogawa, Masuro; Noguchi, Hiroshi; Murata, Mikio; *; *; *; et al.

JAERI-M 91-126, 511 Pages, 1991/08

JAERI-M-91-126.pdf:12.54MB

no abstracts in English

JAEA Reports

Japanese contributions to ITER testing program of solid breeder blankets for DEMO

Kuroda, Toshimasa*; Yoshida, Hiroshi; Takatsu, Hideyuki; *; Mori, Seiji*; *; *; Hirata, Shingo*; Miura, H.*

JAERI-M 91-063, 72 Pages, 1991/04

JAERI-M-91-063.pdf:1.55MB

no abstracts in English

Journal Articles

Material behavior of first wall in JT-60

Ando, Toshiro; Takatsu, Hideyuki; Nakamura, Hiroo; Yamamoto, Masahiro; ; Arai, Takashi; Kaminaga, Atsushi; ; Horiike, Hiroshi; Shimizu, Masatsugu; et al.

Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.27 - 49, 1991/03

no abstracts in English

JAEA Reports

Evaluation tests on first wall and divertor plate materials for JT-60 upgrade

Yamamoto, Masahiro; Ando, Toshiro; Takatsu, Hideyuki; Shimizu, Masatsugu; Arai, Takashi; ; Horiike, Hiroshi; Teruyama, Kazuhiro*; *; Goto, Yoshitaka*

JAERI-M 90-119, 77 Pages, 1990/08

JAERI-M-90-119.pdf:1.75MB

no abstracts in English

Journal Articles

JT-60 upgrade program

Kikuchi, Mitsuru; Ando, Toshiro; Araki, Masanori; ; Horiike, Hiroshi; Ikeda, Yoshitaka; ; Koizumi, Koichi; Matsukawa, Makoto; ; et al.

Fusion Technology 1988, p.287 - 292, 1989/00

no abstracts in English

Journal Articles

JT-60U system design

Matsukawa, Makoto; Ando, Toshiro; Araki, Masanori; ; Horiike, Hiroshi; Ikeda, Yoshitaka; Kikuchi, Mitsuru; ; Koizumi, Koichi; ; et al.

Fusion Technology 1988, p.293 - 297, 1989/00

no abstracts in English

Oral presentation

Overview of fusion technology activities in Japan for ITER, BA and DEMO

Takatsu, Hideyuki; Hayashi, Takumi; Horiike, Hiroshi*; Sagara, Akio*

no journal, , 

no abstracts in English

17 (Records 1-17 displayed on this page)
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