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Oral presentation

Development of the method of fuel ratio measurement with neutron measurement planned on ITER experiments

Okada, Koichi; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Nishitani, Takeo; Nomura, Ken*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*

no journal, , 

no abstracts in English

Oral presentation

Magnetic excitations in the diagonal incommensurate phase of lightly-doped La$$_{2-x}$$Sr$$_x$$CuO$$_4$$

Matsuda, Masaaki; Wakimoto, Shuichi; Fujita, Masaki*; Yamada, Kazuyoshi*

no journal, , 

no abstracts in English

Oral presentation

Development of the uniform irradiation method using multipole magnets and the measurement method of two-dimensional intensity distribution

Yuri, Yosuke; Agematsu, Takashi; Arakawa, Kazuo; Ishibori, Ikuo; Kamiya, Tomihiro; Kashiwagi, Hirotsugu; Kurashima, Satoshi; Miyawaki, Nobumasa; Nara, Takayuki; Okumura, Susumu; et al.

no journal, , 

no abstracts in English

Oral presentation

Spin flop transition in mixed spin quantum ferrimagnetic chain

Sakai, Toru; Okamoto, Kiyomi*; Tonegawa, Takashi*

no journal, , 

no abstracts in English

Oral presentation

Resonant inelastic X-ray scattering study of YVO$$_3$$

Ikeuchi, Kazuhiko; Sato, Tomohiro; Ishii, Kenji; Inami, Toshiya; Mizuki, Junichiro; Bizen, Daisuke*; Murakami, Yoichi; Miyasaka, Shigeki*; Fujioka, Jun*; Tokura, Yoshinori*

no journal, , 

I will present resonant inelastic X-ray scattering measurements of the electric excitations in YVO $$_3$$ with the incident energy of the K edge of vanadium at room temperature. We observed excitations corresponding to a Mott gap. We also performed the measurements of polarization dependence of the excitations. Remarkable change was observed on the Mott excitations about the measurements above the T $$_c$$ of the orbital order.

Oral presentation

Electronic states of single component molecular metal Ni(tmdt)$$_2$$ and Au(tmdt)$$_2$$

Seo, Hitoshi; Okano, Yoshinori*; Ishibashi, Shoji*; Kobayashi, Hayao*; Fukuyama, Hidetoshi*; Kobayashi, Akiko*

no journal, , 

We investigate the electronic states of single component molecular conductors Ni(tmdt)$$_2$$ and Au(tmdt)$$_2$$. Starting from the intramolecular bonding/antibonding molecular orbitals which contributes to the levels near the Fermi energy, we contstruct an effective tight-binding model by decomposing them into orbitals of two (tmdt) and that of the metal. We discuss possible spin/charge ordered states within mean-field approximation and compare our results with the magnetic order found in Au(tmdt)$$_2$$.

Oral presentation

Reduce of curie temperature of La-doped BiFeO$$_3$$

Yoneda, Yasuhiro; Yoshii, Kenji; Saito, Hiroyuki; Mizuki, Junichiro

no journal, , 

no abstracts in English

Oral presentation

First principles molecular dynamics simulations of liquid water under high pressure, 3

Ikeda, Takashi

no journal, , 

no abstracts in English

Oral presentation

Diffuse scattering of PbF$$_{2}$$

Xianglian*; Basar, K.*; Sainer, S.*; Ohara, Kota*; Sakuma, Takashi*; Takahashi, Haruyuki*; Igawa, Naoki; Ishii, Yoshinobu

no journal, , 

no abstracts in English

Oral presentation

Development of collective Thomson scattering for $$alpha$$-particle diagnostic in burning plasma

Kondoh, Takashi; Hayashi, Toshimitsu; Kawano, Yasunori; Kusama, Yoshinori; Sugie, Tatsuo

no journal, , 

no abstracts in English

Oral presentation

Study of energy resolution function on near-backscattering spectrometer DIANA

Shibata, Kaoru; Takahashi, Nobuaki; Sato, Taku*; Kawakita, Yukinobu*; Nakajima, Kenji; Arai, Masatoshi; Mezei, F.*

no journal, , 

no abstracts in English

Oral presentation

Spherical neutron polarization analysis of artificially confined spin-density waves and a phase slip transition in Cr/Sn multilayers

Takeda, Masayasu; Kakurai, Kazuhisa; Mibu, Ko*

no journal, , 

no abstracts in English

Oral presentation

Structural phase transition of In/Si(111) surface studied by reflection high-energy positron diffraction

Hashimoto, Mie; Fukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko

no journal, , 

no abstracts in English

Oral presentation

NMR study of plutonium dioxide PuO$$_2$$

Tokunaga, Yo; Haga, Yoshinori; Sakai, Hironori; Kambe, Shinsaku; Homma, Yoshiya*; Aoki, Dai*; Fujimoto, Tatsuya; Ikeda, Shugo; Matsuda, Tatsuma; Yamamoto, Etsuji; et al.

no journal, , 

$$^{17}$$O NMR measurements have been performed on a series of the actinide dioxides, UO$$_2$$, NpO$$_2$$ and PuO$$_2$$. Although the $$^{17}$$O NMR spectra in these materials are similar at higher temperatures, the low-temperature spectra present are significantly different. In UO$$_2$$ we have observed a wide spectrum, forming a rectangular shape below $$T_N$$=30 K. In NpO$$_2$$, on the other hand, the spectra broaden rather gradually and exhibit a two-peak structure below $$T_0=26$$ K. In PuO$$_2$$, neither spectrum broadening nor splitting has been observed. We show that these NMR spectra clearly indicate the different nature of the low-temperature magnetic ground states in these actinide compounds.

Oral presentation

Surface structure and phase transition of Pb/Ge(111) studied by reflection high-energy positron diffraction

Fukaya, Yuki; Hashimoto, Mie; Kawasuso, Atsuo; Ichimiya, Ayahiko

no journal, , 

no abstracts in English

Oral presentation

NMR study of ordered state in NpFeGa$$_5$$

Kambe, Shinsaku; Sakai, Hironori; Tokunaga, Yo; Fujimoto, Tatsuya; Aoki, Dai*; Homma, Yoshiya*; Haga, Yoshinori; Walstedt, R. E.*; Onuki, Yoshichika*

no journal, , 

The ordered state of NpFeGa$$_5$$ will be discussed. At T$$_N$$=116K, the first antiferromagnetic phase appears and the second one appears at T*=80K. The second phase is not clear in the present. We report Ga-NMR in this compound. NMR spectrum between T$$_N$$ and T* is consistent with neutron scattering measurements which shows that the ordered vector is along the [110] direction with Q=(1/2,1/2,0). However, below T*, Ga (2) (4i site) site spectrum is spilitted due to a symmetry lowering. This cannot be explained with recent polarized neutron scattering study. The orederd phase below T* will be discussed.

Oral presentation

Fast neutron emission profile measurements using a digital signal processing technique in JT-60U

Ishikawa, Masao; Itoga, Toshio*; Okuji, Toshio*; Baba, Mamoru*; Shinohara, Koji; Hayashi, Takao; Sukegawa, Atsuhiko

no journal, , 

no abstracts in English

Oral presentation

Magnetic ordering process in layered triangular system LuFe$$_{2}$$O$$_{4}$$ in applied field

Kakurai, Kazuhisa; Matsuda, Masaaki; Yoshii, Kenji; Ikeda, Naoshi*; Ishii, Yoshinobu; Kito, Hijiri*; Yamada, Yasusada*

no journal, , 

no abstracts in English

Oral presentation

NMR/NQR study of antiferromagnet UIn$$_3$$

Sakai, Hironori; Kambe, Shinsaku; Tokunaga, Yo; Fujimoto, Tatsuya; Aoki, Dai*; Tokiwa, Yoshifumi*; Matsuda, Tatsuma; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika*

no journal, , 

no abstracts in English

Oral presentation

Study of superconductivity in a two-orbital Hubbard model on a square lattice

Kubo, Katsunori

no journal, , 

Orbital degree of freedom of electrons is an important ingredient to determine physical properties. In particular, effects of orbital degree of freedom on magnetism have been studied intensively. In recent years, superconductivity in systems with orbital degree of freedom has been studied, and some theoretical studies have been done for such materials. However, it is still important to study relatively simple models to grasp the role of orbital degree of freedom in superconductivity. For a pairing state composed of electrons with antisymmetrical orbital states, even-parity spin-triplet states such as an $$s$$-wave triplet state and odd-parity spin-singlet states such as a $$p$$-wave singlet state are possible. To investigate such exotic superconductivity, we apply fluctuation exchange approximation toan two-orbital Hubbard model on a square lattice. Then, we find that $$s$$-wave triplet and $$p$$-wave singlet states appears for a region where the electron number $$n$$ per site is around 1.

74 (Records 1-20 displayed on this page)