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Journal Articles

Advanced analysis technology for new material and product development

Sasaki, Hirokazu*; Nishikubo, Hideo*; Nishida, Shinsuke*; Yamazaki, Satoshi*; Nakasaki, Ryusuke*; Isomatsu, Takemi*; Minato, Ryuichiro*; Kinugawa, Kohei*; Imamura, Akihiro*; Otomo, Shinya*; et al.

Furukawa Denko Jiho, (138), p.2 - 10, 2019/02

no abstracts in English

Journal Articles

Present status of J-PARC linac

Oguri, Hidetomo; Hasegawa, Kazuo; Ito, Takashi; Chishiro, Etsuji; Hirano, Koichiro; Morishita, Takatoshi; Shinozaki, Shinichi; Ao, Hiroyuki; Okoshi, Kiyonori; Kondo, Yasuhiro; et al.

Proceedings of 11th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.389 - 393, 2014/10

no abstracts in English

Journal Articles

Uniaxial strain dependence of the critical current of DI-BSCCO tapes

Osamura, Kozo*; Machiya, Shutaro*; Hampshire, D. P.*; Tsuchiya, Yoshinori*; Shobu, Takahisa; Kajiwara, Kentaro*; Osabe, Goro*; Yamazaki, Kohei*; Yamada, Yuichi*; Fujikami, Jun*

Superconductor Science and Technology, 27(8), p.085005_1 - 085005_11, 2014/08

 Times Cited Count:20 Percentile:69.85(Physics, Applied)

Journal Articles

Critical competition between two distinct orbital-spin ordered states in perovskite vanadates

Fujioka, Jun*; Yasue, Toshio*; Miyasaka, Shigeki*; Yamazaki, Yuichi*; Arima, Takahisa*; Sagayama, Hajime*; Inami, Toshiya; Ishii, Kenji; Tokura, Yoshinori*

Physical Review B, 82(14), p.144425_1 - 144425_12, 2010/10

 Times Cited Count:43 Percentile:13.5(Materials Science, Multidisciplinary)

Journal Articles

Unconventional ferroelectric transition in the multiferroic compound TbMnO$$_{3}$$ revealed by the absence of an anomaly in $$c$$-polarized phonon dispersion

Kajimoto, Ryoichi; Sagayama, Hajime*; Sasai, Kenzo*; Fukuda, Tatsuo; Tsutsui, Satoshi*; Arima, Takahisa*; Hirota, Kazuma*; Mitsui, Yukari*; Yoshizawa, Hideki*; Baron, A. Q. R.*; et al.

Physical Review Letters, 102(24), p.247602_1 - 247602_4, 2009/06

 Times Cited Count:11 Percentile:59.16(Physics, Multidisciplinary)

Journal Articles

Magnetic-field-induced transition in the lattice modulation of colossal magnetoelectric GdMnO$$_3$$ and TbMnO$$_3$$ compounds

Arima, Takahisa*; Goto, Tsuyoshi*; Yamazaki, Yuichi*; Miyasaka, Shigeki*; Ishii, Kenji; Tsubota, Masami; Inami, Toshiya; Murakami, Yoichi*; Tokura, Yoshinori*

Physical Review B, 72(10), p.100102_1 - 100102_4, 2005/09

 Times Cited Count:118 Percentile:95.3(Materials Science, Multidisciplinary)

Single-crystal synchrotron X-ray diffraction measurements in strong magnetic fields have been performed for magnetoelectric compounds GdMnO$$_3$$ and TbMnO$$_3$$. It has been found that the ${bf P}$//a ferroelectric phase induced by the application of a magnetic field at low temperatures is characterized by commensurate lattice modulation along the orthorhombic ${it b}$ axis with q=1/2 and q=1/4. The lattice modulation is ascribed to antiferromagnetic spin alignment with a modulation vector of (0 1/4 1). The change of the spin structure is directly correlated with the magnetic-field-induced electric phase transition, because any commensurate spin modulation with (0 1/4 1) should break glide planes normal to the ${it a}$ axis of the distorted perovskite with the space group.

Oral presentation

Inelastic X-ray scattering study of phonons in the multiferroic compound TbMnO$$_3$$

Kajimoto, Ryoichi; Sagayama, Hajime*; Sasai, Kenzo*; Fukuda, Tatsuo; Tsutsui, Satoshi*; Arima, Takahisa*; Hirota, Kazuma*; Mitsui, Yukari*; Yoshizawa, Hideki*; Baron, A. Q. R.*; et al.

no journal, , 

Oral presentation

Direct energy conversion from radiation to electricity; Radioactive waste to energy

Yoshii, Kenji; Fukuda, Tatsuo; Kamiya, Junichiro; Shiwaku, Hideaki; Kobayashi, Toru; Tanida, Hajime; Yamazaki, Yuichi*; Oshima, Takeshi*; Yaita, Tsuyoshi

no journal, , 

Management of radioactive wastes is one of the main issues of nuclear power technology. Radioactive wastes can be regarded as energy resources because of their stable radioactive emissions for long half-lives. In this study, we have attempted a direct conversion from gamma rays to electricity using solid state materials such as III-V semiconductors. The experiments were done using the gamma rays of 660keV ($$^{137}$$Cs), 60 keV ($$^{241}$$Am), 30 keV ($$^{237}$$Np). The energy conversion efficiencies were 0.1-1%. Details will be reported at the conference.

Oral presentation

Possibility of direct energy conversion from radiation to electricity using SiC Schottky system

Yoshii, Kenji; Fukuda, Tatsuo; Tanida, Hajime; Shiwaku, Hideaki; Kamiya, Junichiro; Makino, Takahiro*; Yamazaki, Yuichi*; Oshima, Takeshi*; Yaita, Tsuyoshi

no journal, , 

We have carried out direct energy conversion from gamma rays to electricity using SiC free of toxic elements. The experiments were done using synchrotron radiation at the BL22XU beamline. To utilize radioactive wastes as an energy source, the gamma ray energies were 30 and 60 keV, corresponding to the energies from $$^{237}$$Np and $$^{241}$$Am, respectively. Also, CuK$$alpha$$ X-rays were used to show a possibility of micro batteries using radioisotopes. The samples were Ni/SiC Schottky barrier junctions. From dark current experiments, it was found that the samples were regarded as ideal diodes on the basis of the so-called ideality factors. The electric powers under gamma rays and X-rays were found to be about 0.1$$mu$$W, corresponding to efficiencies less than 0.1%. We will also show the results of energy depositions on the basis of Monte Carlo methods.

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