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Journal Articles

Structural, magnetic, transport, and thermoelectric properties of the pseudobrookite AlTi$$_{2}$$O$$_{5}$$-Ti$$_{3}$$O$$_{5}$$ system

Takahama, Ryusei*; Ishii, Toi*; Indo, Daigo*; Arizono, Mitsutoshi*; Terakura, Chieko*; Tokura, Yoshinori*; Takeshita, Nao*; Noda, Masaaki*; Kuwahara, Hideki*; Saiki, Takuo*; et al.

Physical Review Materials (Internet), 4(7), p.074401_1 - 074401_11, 2020/07

 Times Cited Count:1 Percentile:20.84(Materials Science, Multidisciplinary)

Journal Articles

Schottky specific heat of the lightly Mn-substituted electron-doped SrTiO$$_3$$

Okuda, Tetsuji*; Kajimoto, Ryoichi; Noda, Masaaki*; Kuwahara, Hideki*

AIP Advances (Internet), 8(10), p.101339_1 - 101339_5, 2018/10

 Times Cited Count:0 Percentile:0(Nanoscience & Nanotechnology)

Journal Articles

Elastic and dynamical structural properties of La and Mn-doped SrTiO$$_{3}$$ studied by neutron scattering and their relation with thermal conductivities

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Murai, Naoki; Shamoto, Shinichi; Honda, Takashi*; Ikeda, Kazutaka*; Otomo, Toshiya*; Hata, Hiroto*; Eto, Takahiro*; Noda, Masaaki*; et al.

Scientific Reports (Internet), 8(1), p.9651_1 - 9651_8, 2018/06

 Times Cited Count:4 Percentile:32.16(Multidisciplinary Sciences)

Journal Articles

Effects of Mn substitution on the thermoelectric properties and thermal excitations of the electron-doped perovskite Sr$$_{1-x}$$La$$_{x}$$TiO$$_{3}$$

Okuda, Tetsuji*; Hata, Hiroto*; Eto, Takahiro*; Sobaru, Shogo*; Oda, Ryosuke*; Kaji, Hiroki*; Nishina, Kosuke*; Kuwahara, Hideki*; Nakamura, Mitsutaka; Kajimoto, Ryoichi

Journal of the Physical Society of Japan, 85(9), p.094717_1 - 094717_6, 2016/09

 Times Cited Count:5 Percentile:41.12(Physics, Multidisciplinary)

Journal Articles

Development of spin correlations in the geometrically frustrated triangular-lattice Heisenberg antiferromagnet CuCrO$$_2$$

Kajimoto, Ryoichi; Tomiyasu, Keisuke*; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Okuda, Tetsuji*

Journal of the Physical Society of Japan, 84(7), p.074708_1 - 074708_6, 2015/07

 Times Cited Count:8 Percentile:58.5(Physics, Multidisciplinary)

Journal Articles

Effects of Mn substitution on the thermoelectric properties of the electron-doped perovskite Sr$$_{1-x}$$La$$_{x}$$TiO$$_{3}$$

Okuda, Tetsuji*; Hata, Hiroto*; Eto, Takahiro*; Nishina, Kosuke*; Kuwahara, Hideki*; Nakamura, Mitsutaka; Kajimoto, Ryoichi

Journal of Physics; Conference Series, 568(Part 2), p.022035_1 - 022035_5, 2014/12

Journal Articles

Low-energy spin fluctuations in CuCrO$$_{2}$$ and Cu$$_{0.85}$$Ag$$_{0.15}$$CrO$$_{2}$$ studied by inelastic neutron scattering

Kajimoto, Ryoichi; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Okuda, Tetsuji*; Tomiyasu, Keisuke*

JPS Conference Proceedings (Internet), 3, p.014018_1 - 014018_5, 2014/06

Journal Articles

Effects of Mg, Ag, and Al substitutions on magnetic excitations in the triangular-lattice antiferromagnet CuCrO$$_{2}$$

Kajimoto, Ryoichi; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Kakurai, Kazuhisa; Hokazono, Takahisa*; Ozono, Akira*; Okuda, Tetsuji*

Journal of the Physical Society of Japan, 82(5), p.054702_1 - 054702_6, 2013/05

 Times Cited Count:4 Percentile:36.94(Physics, Multidisciplinary)

Journal Articles

Effect of spin dilution on the magnetic state of delafossite CuCrO$$_{2}$$ with an $$S$$ = 3/2 antiferromagnetic triangular sublattice

Okuda, Tetsuji*; Uto, Kazuma*; Seki, Shinichiro*; Onose, Yoshinori*; Tokura, Yoshinori*; Kajimoto, Ryoichi; Matsuda, Masaaki*

Journal of the Physical Society of Japan, 80(1), p.014711_1 - 014711_7, 2011/04

 Times Cited Count:25 Percentile:77.79(Physics, Multidisciplinary)

Journal Articles

Temperature and Ag doping effect on magnetic excitations in the quasi-two-dimensional triangular lattice antiferromagnet CuCrO$$_2$$ studied by inelastic neutron scattering

Kajimoto, Ryoichi; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Kakurai, Kazuhisa; Arai, Masatoshi; Hokazono, Takahisa*; Ozono, Akira*; Okuda, Tetsuji*

Journal of the Physical Society of Japan, 79(12), p.123705_1 - 123705_4, 2010/12

 Times Cited Count:21 Percentile:74(Physics, Multidisciplinary)

Journal Articles

Dimensional crossover of low-energy magnetic excitation for delafossite oxide Cu$$_{1-x}$$Ag$$_{x}$$CrO$$_{2}$$ with a spin-3/2 antiferromagnetic triangular sublattice

Okuda, Tetsuji*; Kishimoto, Taizo*; Uto, Kazuma*; Hokazono, Takahisa*; Onose, Yoshinori*; Tokura, Yoshinori*; Kajimoto, Ryoichi; Matsuda, Masaaki

Journal of the Physical Society of Japan, 78(1), p.013604_1 - 013604_4, 2009/01

 Times Cited Count:26 Percentile:77.7(Physics, Multidisciplinary)

Oral presentation

Magnetic correlation in delafossite oxides CuCr$$_{1-x}$$Mg$$_{x}$$O$$_{2}$$ and Cu$$_{1-y}$$Ag$$_{y}$$CrO$$_{2}$$

Kajimoto, Ryoichi; Matsuda, Masaaki; Kishimoto, Taizo*; Uto, Kazuma*; Hokazono, Takahisa*; Okuda, Tetsuji*

no journal, , 

no abstracts in English

Oral presentation

Magnetic correlation in delafossite oxides CuCr$$_{1-x}$$Mg$$_{x}$$O$$_{2}$$ and Cu$$_{1-y}$$Ag$$_{y}$$CrO$$_{2}$$

Kajimoto, Ryoichi; Matsuda, Masaaki; Kishimoto, Taizo*; Uto, Kazuma*; Hokazono, Takahisa*; Okuda, Tetsuji*

no journal, , 

no abstracts in English

Oral presentation

Al substitution effect on magnetic correlation in delafossite oxide CuCr$$_{1-x}$$Al$$_x$$O$$_2$$

Kajimoto, Ryoichi; Matsuda, Masaaki; Uto, Kazuma*; Okuda, Tetsuji*

no journal, , 

no abstracts in English

Oral presentation

Magnetic excitations in the 2D triangular lattice antiferromagnets Cu$$_{1-x}$$Ag$$_{x}$$CrO$$_{2}$$

Kajimoto, Ryoichi; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Matsuda, Masaaki*; Kakurai, Kazuhisa; Arai, Masatoshi; Hokazono, Takahisa*; Ozono, Akira*; Okuda, Tetsuji*

no journal, , 

no abstracts in English

Oral presentation

Magnetic diffuse scattering in the triangular-lattice antiferromagnet CuCrO$$_2$$

Kajimoto, Ryoichi; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Okuda, Tetsuji*; Tomiyasu, Keisuke*

no journal, , 

no abstracts in English

Oral presentation

Low-energy spin fluctuations in the triangular-lattice antiferromagnet CuCrO$$_2$$

Kajimoto, Ryoichi; Nakajima, Kenji; Kawamura, Seiko; Inamura, Yasuhiro; Tomiyasu, Keisuke*; Okuda, Tetsuji*

no journal, , 

no abstracts in English

Oral presentation

Phonon anomalies and thermoelectric properties in La and Mn-doped SrTiO$$_3$$

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Hata, Hiroto*; Eto, Takahiro*; Okuda, Tetsuji*

no journal, , 

no abstracts in English

Oral presentation

Evaluation of the tube-voltage dependence of organ doses in X-ray CT scans using Monte-Carlo calculation

Koba, Yusuke*; Matsumoto, Shinnosuke*; Nakada, Yoshihiro*; Kasahara, Tetsuji*; Akahane, Keiichi*; Okuda, Yasuo*; Sato, Kaoru; Takahashi, Fumiaki; Yoshitake, Takayasu*; Hasegawa, Takayuki*; et al.

no journal, , 

Many of the CT devices are in Japan. It is guessed that exposure doses of Japanese derived from CT scans are higher than others. Thus, it is needed to properly manage scan conditions and exposure doses of individual patients. JAEA developed WAZA-ARI under the collaboration research project with the National Institute of Radiological Sciences (NIRS) and the Oita University of Nursing and Health Sciences. Practical use of new version WAZA-ARI named WAZA-ARIv2 began on January 30, 2015 at the web server in NIRS. In WAZA-ARIv2, users can calculate patients doses by using only standard condition (120 kV) of X-tube voltage. In recent years, CT scans at low tube voltage against pediatric patients with high radiosensitivity are increasing. In this study, spectrum of X-ray derived from CT scan at low tube voltage was examined, and was defined in "usrsors.f" file of PHITS. We reported the characteristics of X-ray and organ doses derived from CT scan at low tube voltage (80 kV).

Oral presentation

Element substitution effect on phonons in SrTiO$$_3$$ by powder inelastic neutron scattering

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Kikuchi, Tatsuya; Hata, Hiroto*; Eto, Takahiro*; Sobaru, Shogo*; Okuda, Tetsuji*

no journal, , 

no abstracts in English

24 (Records 1-20 displayed on this page)