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Akimura, Yuka; Maruyama, Toshiki; Hatsuda, Tetsuo*; Yoshinaga, Naotaka*; Chiba, Satoshi
no journal, ,
no abstracts in English
EuSato, Tetsuya; Osa, Akihiko; Asai, Masato; Ichikawa, Shinichi; Tsukada, Kazuaki; Shibata, Michihiro*; Hayashi, Hiroaki*; Kojima, Yasuaki*
no journal, ,
no abstracts in English
Okamoto, Hiromi*; Yuri, Yosuke
no journal, ,
no abstracts in English
Koura, Hiroyuki; Tachibana, Takahiro*; Chiba, Satoshi
no journal, ,
no abstracts in English
Al
Fujimori, Shinichi; Okane, Tetsuo; Saito, Yuji; Kobayashi, Keisuke; Fujimori, Atsushi; Yamagami, Hiroshi; Ikeda, Shugo; Matsuda, Tatsuma; Haga, Yoshinori; Yamamoto, Etsuji; et al.
no journal, ,
no abstracts in English
SiHonda, Fuminori; Metoki, Naoto; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika*
no journal, ,
no abstracts in English
Si using non-resonant X-ray scatteringOsumi, Hiroyuki*; Honda, Fuminori; Metoki, Naoto; Tsutsui, Satoshi*; Ishii, Kenji; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika*
no journal, ,
no abstracts in English
Takahashi, Shin*; Fujimoto, Yoichi*; Aruga, Tetsuya*; Teraoka, Yuden; Yoshigoe, Akitaka; Moritani, Kosuke
no journal, ,
Ru(0001) surface was oxidized by supersonic oxygen molecular beams. Chemical bonding states of O and Ru atoms at the surface were analized by photoemission spectroscopy with synchrotron radiation. First, the Ru(0001) surface was exposed to oxygen gas to be formed oxygen-saturated surface with 0.5 ML. The oxidized Ru surface was irradiated by supersonic oxygen molecular beams. Adsorption characterictics of oxygen molecules were investigated. The translational kinetic energy of oxygen molecular beam was 0.5eV. Differences of oxygen uptake curves were investigated for a nozzle temperature of 300K and 1400K. In the case of 300K, saturated oxygen amount increased up to 0.58ML. The oxygen coverage increased up to 0.61ML in the case of 1400K. The difference was interpreted as a large adsorption probability of vibrationally-excited oxygen molecules.
Shinohara, Koji; Sakurai, Shinji; Ishikawa, Masao; Koide, Yoshihiko; Nakano, Tomohide; Tsuzuki, Kazuhiro; Oyama, Naoyuki; Yoshida, Maiko; Urano, Hajime; Suzuki, Yutaka; et al.
no journal, ,
no abstracts in English
Sagisaka, Akito; Nakamura, Shu; Mori, Michiaki; Daido, Hiroyuki; Fukumi, Atsushi*; Ogura, Koichi; Orimo, Satoshi; Hayashi, Yukio; Takai, Mamiko; Yogo, Akifumi; et al.
no journal, ,
no abstracts in English
Ikegami, Masahiro*; Okamoto, Hiromi*; Yuri, Yosuke; Soda, Hikaru*; Tanabe, Mikio*; Noda, Akira*
no journal, ,
no abstracts in English
-Ag surface studied by reflection high-energy positron diffraction, 2Fukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko
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no abstracts in English
Ikeda, Takashi
no journal, ,
no abstracts in English
-ray measurement of the neutron-rich nucleus 
Cm
Ishii, Tetsuro; Shigematsu, Soichiro; Makii, Hiroyuki; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Shizuma, Toshiyuki; Kaneko, Junichi*; et al.
no journal, ,
no abstracts in English
Akahane, Takashi*; Fujinami, Masanori*; Watanabe, Kazuya*; Oguma, Koichi*; Matsukawa, Kazuto*; Harada, Hirofumi*; Maekawa, Masaki; Kawasuso, Atsuo
no journal, ,
no abstracts in English
Maruyama, Ryuji; Yamazaki, Dai; Ebisawa, Toru*; Soyama, Kazuhiko
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Hoshikawa, Akinori; Ishii, Yoshinobu
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no abstracts in English
Sato, Masayasu; Isayama, Akihiko
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no abstracts in English
Mitsui, Takaya; Seto, Makoto; Masuda, Ryo*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Hirao, Naohisa*
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no abstracts in English
probed by muon spin rotationOishi, Kazuki; Heffner, R. H.; Higemoto, Wataru; Ito, Takashi; Morris, G. D.*; Bauer, E. D.*; Morales, L. A.*; Sarrao, J. L.*; Fluss, M. J.*; MacLaughlin, D. E.*; et al.
no journal, ,
The discovery of the first Pu-based superconductor PuCoGa
(
= 18.5 K) demonstrates the rich and complex nature of Pu-based materials. The mechanism of the superconductivity in PuCoGa is still under investigation, though recent experiments and theory suggest a magnetic origin. For example, the electronic structure of this material was investigated theoretically, and spin-fluctuation mediated superconductivity was suggested. NMR results also suggest that the superconducting order parameter of this Pu-based superconductor has d-wave symmetry. We note that Pu is a radioactive nucleus (
Pu, 
= 24000 years), thus PuCoGa suffers self-induced radiation damage. Previous 
SR results performed at 600 Oe in a 25-day old single crystalline sample show a linear temperature dependence for the muon spin relaxation rate 
(
, 
: magnetic penetration depth) for 
0.5, suggesting d-wave pairing symmetry. We have performed SR experimentes on the same sample after 400 days of aging in order to obtain more detailed information on the order parameter, i.e., T-dependence of at several magnetic fields, as well as the effects of aging. We found that Tc decreased from 18.5 K to 15 K for the 25-day and 400-day samples, respectively, yet the linear temperature dependence remains, consistent with a line of nodes (and suggesting d-wave pairing symmetry). These results indicate that the temperature dependence of does not depend on accumulated radiation damage over the span of time measured.