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Journal Articles

Study of catalytic reaction at electrode-electrolyte interfaces by a CV-XAFS method

Kusano, Shogo*; Matsumura, Daiju; Asazawa, Koichiro*; Kishi, Hirofumi*; Sakamoto, Tomokazu*; Yamaguchi, Susumu*; Tanaka, Hirohisa*; Mizuki, Junichiro*

Journal of Electronic Materials, 46(6), p.3634 - 3638, 2017/06

https://doi.org/10.1007/s11664-016-5259-x
 Times Cited Count：3 Percentile：19.71(Engineering, Electrical & Electronic)

Journal Articles

Influence of sedimentation of atoms on structural and thermoelectric properties of Bi-Sb alloys

Januszko, K.*; Stabrawa, A.*; Ogata, Yudai; Tokuda, Makoto*; Khandaker, J. I.*; Wojciechowski, K.*; Mashimo, Tsutomu*

Journal of Electronic Materials, 45(3), p.1947 - 1955, 2016/03

https://doi.org/10.1007/s11664-015-4307-2
 Times Cited Count：6 Percentile：31.03(Engineering, Electrical & Electronic)

Journal Articles

GaSb(001) surface reconstructions measured at the growth front by surface X-ray diffraction

Tinkham, B. P.*; Romanyuk, O.*; Braun, W.*; Ploog, K. H.*; Grosse, F.*; Takahashi, Masamitsu; Kaizu, Toshiyuki*; Mizuki, Junichiro

Journal of Electronic Materials, 37(12), p.1793 - 1798, 2008/12

https://doi.org/10.1007/s11664-008-0557-6
 Times Cited Count：4 Percentile：30.85(Engineering, Electrical & Electronic)

Journal Articles

NMR investigation of quadrupole order parameter in actinide dioxides

Tokunaga, Yo; Homma, Yoshiya*; Kambe, Shinsaku; Aoki, Dai*; Sakai, Hironori; Chudo, Hiroyuki; Ikushima, Kenji*; Yamamoto, Etsuji; Nakamura, Akio; Shiokawa, Yoshinobu*; et al.

Journal of Optoelectronics and Advanced Materials, 10(7), p.1663 - 1665, 2008/07

Multipolar degrees of freedom characteristic of $$f$$-electrons bring rich and complex physics to rare-earth and actinide compounds. In the present work, we demonstrate that microscopic investigation of multipole order parameters is also possible by means of NMR through the hyperfine interactions. Our $$^{17}$$O NMR study performed on a single crystal of NpO$$_2$$ provide definitive support for the proposed longitudinal triple-$$q$$ type antiferro-octupolar ordering below $$T_0=$$26 K. We shall also provide our $$^{17}$$O NMR results on UO$$_2$$ and PuO$$_2$$. The microscopic NMR clearly indicates the different nature of the magnetic ground states among three actinide dioxides.

Journal Articles

Superconductivity in e$$_g$$ orbital systems with multi-Fermi-surface

Kubo, Katsunori

Journal of Optoelectronics and Advanced Materials, 10(7), p.1683 - 1687, 2008/07

We study superconductivity in e$$_g$$ orbital systems on a square lattice by applying fluctuation exchange approximation. For such a multiorbital system, even-parity spin-triplet and odd-parity spin-singlet states are allowed by constructing a pair with antisymmetrical orbitals. Indeed, such states appear in a two-orbital Hubbard model with the same Fermi surface for both orbitals. In the present e$$_g$$ orbital model, there is another important feature: the number of Fermi surfaces and their structures depend on the ratio of the Slater-Koster integrals. Then, we find even-parity spin-triplet and odd-parity spin-singlet states with a finite total momentum like the Fulde-Ferrell-Larkin-Ovchinnikovstate even without a magnetic field. When two Fermi surfaces have structures similar to each other, such an exotic pair with a finite total momentum, which connects the centers of the Fermi surfaces, can be stabilized.

Journal Articles

Interfacial properties of a direct bonded Nd-doped YVO$$_{4}$$ and YVO$$_{4}$$ single crystal

Sugiyama, Akira; Nara, Yasunaga; Wada, Kengo*; Fukuyama, Hiroyasu

Journal of Materials Science; Materials in Electronics, 15(9), p.607 - 612, 2004/09

Laser crystal bonding of a neodymium-doped yttrium orthovanadate (Nd: YVO$$_{4}$$) and a non-doped yttrium orthovanadate (YVO$$_{4}$$) crystal as a cold finger has been demonstrated. Instead of a traditional chemical treatment, a newly developed dry etching process was applied to the preparation for contact of mechanically polished surfaces. In the subsequent heat treatment process, stable heating at 873 K was required to prevent precipitation at the bonded interface. The bonded interface of 3 mm $$times$$ 3 mm was investigated by optical scattering and wavefront distortion measurements. The scattering density around the bonded interface was less than 4.6$$times$$10$$^{6}$$ /cm$$^{3}$$ and the wavefront distortion caused by the bonded region was assumed to be around 0.04-wave at 633 nm. Additional magnified inspection showed that atoms in the bonded region were well arranged with the same regularity as the bulk crystal. The diffusion coefficient of Nd$$^{3+}$$ ions in the YVO$$_{4}$$ crystal was estimated at 2.3$$times$$10$$^{-23}$$ m$$^{2}$$/sec at 873 K.

Journal Articles

Deep level transient spectroscopy study of electron-irradiated CuInSe$$_{2}$$ thin films

Okada, Hiroshi*; Fujita, Naoki*; Lee, H.-S.*; Wakahara, Akihiro*; Yoshida, Akira*; Oshima, Takeshi; Ito, Hisayoshi

Journal of Electronic Materials, 32(9), p.L5 - L8, 2003/09

https://doi.org/10.1007/s11664-003-0234-8
 Times Cited Count：1 Percentile：12.37(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Improved cooling performance of ytterbium-doped glass combined with sapphire

Nishimura, Akihiko; Sugiyama, Akira; Usami, Tsutomu; Ohara, K.*

Journal of Materials Science; Materials in Electronics, 14(1), p.1 - 3, 2003/01

no abstracts in English

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