JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-8 displayed on this page of 8
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Oxidation reaction kinetics on transition metal surfaces observed by real-time photoelectron spectroscopy

Ogawa, Shuichi*; Zhang, B.*; Yoshigoe, Akitaka; Takakuwa, Yuji*

Vacuum and Surface Science, 64(5), p.218 - 223, 2021/05

https://doi.org/10.1380/vss.64.218

The oxidation reaction kinetics on Ti(0001) and Ni(111) surfaces were observed by real-time photoelectron spectroscopy using synchrotron radiation to measure the oxidation state and oxide thickness. After the Ti(0001) surface was wholly covered by TiO with a thickness of 1.2 nm, the rapid growth of n-type TiO$$_{2}$$ proceeded through the diffusion of Ti$$^{4+}$$ ions to the TiO$$_{2}$$ surface at 400$$^{circ}$$C. A saturation of oxygen uptake on the TiO surface indicates that the O$$_{2}$$ sticking coefficient on the TiO surface is negligibly small and the segregation of Ti to the TiO surface is a trigger to initiate the TiO$$_{2}$$ growth. On the Ni(111) surface at 350$$^{circ}$$C, a thermally stable NiO$$_{x}$$ proceeded preferentially and then the growth of p-type NiO was initiated. The time evolution of NiO thickness was represented by a logarithmic growth model, where the NiO growth is governed by the electron tunneling to the NiO surface.

Journal Articles

X-ray absorption spectroscopy in the heavy Fermion compound $$alpha$$-YbAlB$$_4$$ at high magnetic fields

Terashima, Taku*; Matsuda, Yasuhiro*; Kuga, Kentaro*; Suzuki, Shintaro*; Matsumoto, Yosuke*; Nakatsuji, Satoru*; Kondo, Akihiro*; Kindo, Koichi*; Kawamura, Naomi*; Mizumaki, Masaichiro*; et al.

Journal of the Physical Society of Japan, 84(11), p.114715_1 - 114715_4, 2015/11

https://doi.org/10.7566/JPSJ.84.114715
 Times Cited Count：4 Percentile：34.72(Physics, Multidisciplinary)

Journal Articles

Synchrotron X-ray spectroscopy study on the valence state and magnetization in $$alpha$$-YbAl$$_{1-x}$$Fe$$_x$$B$$_4$$ ($$x=0.115$$) at low temperatures and high magnetic fields

Terashima, Taku*; Matsuda, Yasuhiro*; Kuga, Kentaro*; Suzuki, Shintaro*; Matsumoto, Yosuke*; Nakatsuji, Satoru*; Kondo, Akihiro*; Kindo, Koichi*; Kawamura, Naomi*; Mizumaki, Masaichiro*; et al.

Journal of Physics; Conference Series, 592(1), p.012020_1 - 012020_6, 2015/03

https://doi.org/10.1088/1742-6596/592/1/012020
 Times Cited Count：1 Percentile：43.09(Physics, Atomic, Molecular & Chemical)

Valence fluctuation phenomena in rare-earth intermetallic compounds have attracted attention because the quantum criticality of the valence transition has been proposed theoretically. Recently, it was found that $$beta$$-YbAlB$$_4$$ shows quantum criticality without tuning and has a strong mixed-valence state. In this study, we measured the magnetization curve and X-ray magnetoabsorption in $$alpha$$-YbAl$$_{1-x}$$Fe$$_x$$B$$_4$$ ($$x=0.115$$), which is a locally isostructural polymorph of $$beta$$-YbAlB$$_4$$. The magnetization and X-ray experiments were performed in fields up to 55 and 40 T, respectively. A small increase in the Yb valence was observed at fields where the magnetization curve exhibited a change in slope.

Journal Articles

High-resolution photoemission spectroscopy of Yb$$_{2}$$Co$$_{3}$$X$$_{9}$$(X=Ga and Al)

Okane, Tetsuo; Fujimori, Shinichi; Ino, Akihiro*; Fujimori, Atsushi*; Dhar, S. K.*; Mitra, C.*; Manfrinetti, P.*; Palenzona, A.*

Physica B; Condensed Matter, 312-313, p.349 - 351, 2002/00

https://doi.org/10.1016/S0921-4526(01)01118-8
 Times Cited Count：0 Percentile：0(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Operation of ECR and multi-cusp ion sources for JAERI AVF cyclotron

Yokota, Wataru; Ishibori, Ikuo; Okumura, Susumu; Agematsu, Takashi; Fukuda, Mitsuhiro; Nara, Takayuki; Kamiya, Tomihiro; Nakamura, Yoshiteru; Arakawa, Kazuo; Tachikawa, T.*; et al.

Proc. of the 8th Symp. on Accelerator Science and Technology, p.70 - 72, 1991/00

no abstracts in English

Oral presentation

Intermediate-valence Yb-based quasicrystals and approximants

Watanuki, Tetsu; Yamada, Tsunetomo*; Nakamura, Yoko*; Tanaka, Yukinori*; Machida, Akihiko; Tsai, A. P.*; Ishimasa, Tsutomu*

no journal, , 

no abstracts in English

Oral presentation

Elution behaviour of BaO-FeOx-P$$_{2}$$O$$_{5}$$ glass system in water

Kitamura, Naoto*; Saito, Akira*; Takebe, Hiromichi*; Amamoto, Ippei; Kobayashi, Hidekazu; Tsuzuki, Tatsuya*; Mitamura, Naoki*

no journal, , 

no abstracts in English

Oral presentation

Localized 5$$f^2$$-electron states in UPd$$_5$$Al$$_2$$

Metoki, Naoto; Haga, Yoshinori; Yamamoto, Etsuji; Matsuda, Masaaki*

no journal, , 

We observed clear crystal field excitations of UPd$$_5$$Al$$_2$$, indicating the localized character of 5f electrons with the singlet ground state of U$$^{4+}$$(5$$f^2$$). The excitation spectra and susceptibility can be explained with a similar level scheme of PrPd$$_5$$Al$$_2$$ with 10 times larger energy scale due to a larger itinerancy of 5$$f$$ electrons. The valence (5$$f$$ electron number) rapidly changes from U$$^{4+}$$ to Np$$^{3+}$$. This valence change may play important role for the heavy fermion superconductivity in NpPd$$_5$$Al$$_2$$.

8 (Records 1-8 displayed on this page)
  • 1