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Journal Articles

Inelastic X-ray scattering of $$RT$$Al$$_3$$ ($$R$$ = La, Ce, $$T$$ = Cu, Au)

Tsutsui, Satoshi*; Kaneko, Koji; Pospisil, J.; Haga, Yoshinori

Physica B; Condensed Matter, 536, p.24 - 27, 2018/05

 Times Cited Count:0 Percentile:100(Physics, Condensed Matter)

Journal Articles

Quantitative analysis of tempering microstructure via ${it in-situ}$ synchrotron X-ray diffraction during heating

Morooka, Satoshi; Kanata, Hiroyuki*; Oba, Yojiro*; Sato, Masugu*

Heisei-28-Nendo SPring-8 Sangyo Shinbunya Shien Kadai, Ippan Kadai (Sangyo Bunya) Jisshi Hokokusho, p.95 - 98, 2017/00

no abstracts in English

Journal Articles

$$^{61}$$Ni synchrotron radiation-based M$"o$ssbauer spectroscopy of nickel-based nanoparticles with hexagonal structure

Masuda, Ryo*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Kurokuzu, Masayuki*; Saito, Makina*; Yoda, Yoshitaka*; Mitsui, Takaya; Hosoi, Kohei*; Kobayashi, Hirokazu*; Kitagawa, Hiroshi*; et al.

Scientific Reports (Internet), 6, p.20861_1 - 20861_8, 2016/02

 Times Cited Count:5 Percentile:61.22(Multidisciplinary Sciences)

Journal Articles

Spontaneous formation of suboxidic coordination around Co in ferromagnetic rutile Ti$$_{0.95}$$Co$$_{0.05}$$O$$_2$$ film

Hu, W.*; Hayashi, Koichi*; Fukumura, Tomoteru*; Akagi, Kazuto*; Tsukada, Masaru*; Happo, Naohisa*; Hosokawa, Shinya*; Owada, Kenji; Takahashi, Masamitsu; Suzuki, Motohiro*; et al.

Applied Physics Letters, 106(22), p.222403_1 - 222403_5, 2015/06

 Times Cited Count:26 Percentile:17.19(Physics, Applied)

Journal Articles

Attempt to measure magnetic hyperfine fields in metallic thin wires under spin Hall conditions using synchrotron-radiation M$"o$ssbauer spectroscopy

Mibu, Ko*; Mitsui, Takaya; Tanaka, Masaaki*; Masuda, Ryo*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Yoda, Yoshitaka*; Seto, Makoto*

Journal of Applied Physics, 117(17), p.17E126_1 - 17E126_4, 2015/05

 Times Cited Count:2 Percentile:86.45(Physics, Applied)

Journal Articles

Silicon avalanche photodiode linear-array detector with multichannel scaling system for pulsed synchrotron X-ray experiments

Kishimoto, Shunji*; Mitsui, Takaya; Haruki, Rie*; Yoda, Yoshitaka*; Taniguchi, Takashi*; Shimazaki, Shoichi*; Ikeno, Masahiro*; Saito, Masatoshi*; Tanaka, Masanobu*

Journal of Instrumentation (Internet), 10(5), p.C05030_1 - C05030_6, 2015/05

 Times Cited Count:5 Percentile:64.8(Instruments & Instrumentation)

Journal Articles

$$^{57}$$Fe polarization dependent synchrotron M$"o$ssbauer spectroscopy using a diamond phase plate and an iron borate nuclear Bragg monochromator

Mitsui, Takaya; Imai, Yasuhiko*; Masuda, Ryo*; Seto, Makoto*; Mibu, Ko*

Journal of Synchrotron Radiation, 22(2), p.427 - 435, 2015/03

 Times Cited Count:4 Percentile:66.15(Instruments & Instrumentation)

Journal Articles

Mesoscopic structures of vermiculite and weathered biotite clays in suspension with and without cesium ions

Motokawa, Ryuhei; Endo, Hitoshi*; Yokoyama, Shingo*; Ogawa, Hiroki*; Kobayashi, Toru; Suzuki, Shinichi; Yaita, Tsuyoshi

Langmuir, 30(50), p.15127 - 15134, 2014/12

 Times Cited Count:16 Percentile:40.94(Chemistry, Multidisciplinary)

Journal Articles

High-pressure radiative conductivity of dense silicate glasses with potential implications for dark magmas

Murakami, Motohiko*; Goncharov, A. F.*; Hirao, Naohisa*; Masuda, Ryo*; Mitsui, Takaya; Thomas, S. M.*; Bina, C. R.*

Nature Communications (Internet), 5, p.5428_1 - 5428_6, 2014/11

 Times Cited Count:12 Percentile:48.43(Multidisciplinary Sciences)

Journal Articles

Nuclear resonant scattering measurements on $$^{57}$$Fe by multichannel scaling with a 64 pixel silicon avalanche photodiode linear-array detector

Kishimoto, Shunji*; Mitsui, Takaya; Haruki, Rie*; Yoda, Yoshitaka*; Taniguchi, Takashi*; Shimazaki, Shoichi*; Ikeno, Masahiro*; Saito, Masatoshi*; Tanaka, Masanobu*

Review of Scientific Instruments, 85(11), p.113102_1 - 113102_5, 2014/11

 Times Cited Count:6 Percentile:61.68(Instruments & Instrumentation)

Journal Articles

The Spin state of iron in Fe$$^{3+}$$-bearing Mg-perovskite and its crystal chemistry at high pressure

Mashimo, Izumi*; Otani, Eiji*; Hirao, Naohisa*; Mitsui, Takaya; Masuda, Ryo*; Seto, Makoto*; Sakai, Takeshi*; Takahashi, Suguru*; Nakano, Satoshi*

American Mineralogist, 99(8-9), p.1555 - 1561, 2014/08

 Times Cited Count:4 Percentile:78.53(Geochemistry & Geophysics)

Journal Articles

Development of $$^{125}$$Te synchrotron-radiation-based M$"o$ssbauer spectroscopy

Kurokuzu, Masayuki*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Saito, Makina*; Masuda, Ryo*; Mitsui, Takaya; Yoda, Yoshitaka*; Seto, Makoto*

Hyperfine Interactions, 226(1), p.687 - 691, 2014/04

 Times Cited Count:2 Percentile:34.79

Journal Articles

$$^{125}$$Te synchrotron-radiation-based M$"o$ssbauer spectroscopy of Fe$$_{1.1}$$Te and FeTe$$_{0.5}$$Se

Kurokuzu, Masayuki*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Saito, Makina*; Masuda, Ryo*; Mitsui, Takaya; Yoda, Yoshitaka*; Seto, Makoto*

Journal of the Physical Society of Japan, 83(4), p.044708_1 - 044708_4, 2014/04

 Times Cited Count:1 Percentile:85.34(Physics, Multidisciplinary)

Journal Articles

Synchrotron radiation-based M$"o$ssbauer spectra of $$^{174}$$Yb measured with internal conversion electrons

Masuda, Ryo*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Kurokuzu, Masayuki*; Saito, Makina*; Yoda, Yoshitaka*; Mitsui, Takaya; Iga, Fumitoshi*; Seto, Makoto

Applied Physics Letters, 104(8), p.082411_1 - 082411_5, 2014/02

 Times Cited Count:9 Percentile:51.39(Physics, Applied)

A detection system for synchrotron-radiation (SR)-based M$"o$ssbauer spectroscopy was developed to enhance the nuclear resonant scattering counting rate and thus increase the available nuclides. In the system, a windowless avalanche photodiode (APD) detector was combined with a vacuum cryostat to detect the internal conversion (IC) electrons and fluorescent X-rays accompanied by nuclear de-excitation. As a feasibility study, the SR-based M$"o$ssbauer spectrum using the 76.5 keV level of $$^{174}$$Yb was observed without $$^{174}$$Yb enrichment of the samples. The counting rate was five times higher than that of our previous system, and the spectrum was obtained within 10 h. This result shows that nuclear resonance events can be more efficiently detected by counting IC electrons for nuclides with high IC coefficients. Furthermore, the windowless detection system enables us to place the sample closer to the APD elements and is advantageous for nuclear resonant inelastic scattering measurements. Therefore, this detection system can not only increase the number of nuclides accessible in SR-based M$"o$ssbauer spectroscopy but also allows the nuclear resonant inelastic scattering measurements of small single crystals or enzymes with dilute probe nuclides that are difficult to measure with the previous detection system.

Journal Articles

In situ synchrotron $$^{57}$$Fe M$"o$ssbauer spectroscopy of RFe$$_{2}$$ (R = Y, Gd) hydrides synthesized under ultra-high-pressure hydrogen

Mitsui, Takaya; Masuda, Ryo*; Seto, Makoto; Hirao, Naohisa*; Matsuoka, Takehiro*; Nakamura, Yumiko*; Sakaki, Koji*; Enoki, Hirotoshi*

Journal of Alloys and Compounds, 580(Suppl.1), p.S264 - S267, 2013/12

 Times Cited Count:3 Percentile:70.89(Chemistry, Physical)

Journal Articles

Effects of randomness and frustration on the relaxor nature in Pb(In$$_{1/2}$$Nb$$_{1/2}$$)O$$_{3}$$

Owada, Kenji

Nippon Kessho Gakkai-Shi, 54(3), p.147 - 154, 2012/06

It is well known that B-site randomness contributes to the appearance of relaxor phenomena in the lead-based complex perovskite Pb(B'B'')O$$_{3}$$. But the microscopic mechanism of the effect of B-site randomness on the systems has not been understood yet. Among the Pb(B'B'')O$$_{3}$$ systems, Pb(In$$_{1/2}$$Nb$$_{1/2}$$)O$$_{3}$$ (PIN) has drawn much attention because it can be in the antiferroelectric (AFE), ferroelectric (FE), or relaxor state depending on B-site randomness. We review the recent progress in our understanding of the effect of B-site randomness on PIN from the experimental viewpoint. As a conclusion of the arguments, we also introduce the frustration mechanism in Pb(B'B'')O$$_{3}$$.

Journal Articles

Synchrotron radiation $$^{57}$$Fe-M$"o$ssbauer spectroscopy using nuclear monochromator

Mitsui, Takaya; Masuda, Ryo; Hirao, Naohisa*; Mibu, Ko*; Seto, Makoto

Hyperfine Interactions, 204(1-3), p.97 - 100, 2012/04

 Times Cited Count:1 Percentile:34.1

Journal Articles

Observation of free-electron-laser-induced collective spontaneous emission (superfluorescence)

Nagasono, Mitsuru*; Harries, J.; Iwayama, Hiroshi*; Togashi, Tadashi*; Tono, Kensuke*; Yabashi, Makina*; Semba, Yasunori*; Ohashi, Haruhiko*; Ishikawa, Tetsuya*; Shigemasa, Eiji*

Physical Review Letters, 107(19), p.193603_1 - 193603_5, 2011/11

 Times Cited Count:28 Percentile:18.65(Physics, Multidisciplinary)

Journal Articles

Effect of B-site randomness on the antiferroelectric/relaxor nature of the ground state; Inelastic X-ray scattering study of Pb(In$$_{1/2}$$Nb$$_{1/2}$$)O$$_{3}$$

Owada, Kenji; Fukuda, Tatsuo; Mizuki, Junichiro; Hirota, Kazuma*; Terauchi, Hikaru*; Tsutsui, Satoshi*; Baron, A. Q. R.*; Owa, Hidehiro*; Yasuda, Naohiko*

Journal of the Korean Physical Society, 59(3), p.2509 - 2514, 2011/09

 Times Cited Count:2 Percentile:77.44(Physics, Multidisciplinary)

Pb(In$$_{1/2}$$Nb$$_{1/2}$$)O$$_{3}$$ (PIN) can be antiferroelectric (AFE), ferroelectric (FE) or a relaxor depending upon the perovskite B-site randomness. Orderd PIN (O-PIN, without B-site randomness) is supposed to be an ideal system of lead-based complex perovskite Pb(B'B'')O$$_{3}$$ and expected to give us a clear picture of the AFE/relaxor nature of the ground state by the B-site randomness. We studied the dynamics of O-PIN by inelastic X-ray scattering. The quasielastic (QE) scattering shows the critical slowing down and the transverse acoustic (TA) mode shows the softening towards $$T_{rm N}$$. On the other hand, the transverse optic (TO) mode shows the softening toward low temperature with no clear anomaly at $$T_{rm N}$$. These results represent that the antiferroelectric (AFE) phase transition is associated with the TA and the origin of the QE scattering, while ferroelectric correlation does exist behind the AFE ordering. The effect of B-site randomness is finally discussed on the basis of the results.

Journal Articles

Local crystal structure of nano-manganese-oxide gold adsorbent

Iikubo, Satoshi*; Koyanaka, Hideki*; Shamoto, Shinichi; Takeuchi, Ken*; Kohara, Shinji*; Kodama, Katsuaki; Loong, C.-K.*

Journal of Physics and Chemistry of Solids, 71(11), p.1603 - 1608, 2010/11

 Times Cited Count:8 Percentile:58.22(Chemistry, Multidisciplinary)

The local crystal structure of dried and deuterated nano-manganese-oxide powder samples was studied via atomic pair distribution function analysis of X-ray and neutron powder diffraction data. The protonated sample shows ultrahigh efficiency as a gold adsorbent even from ppt-level aqueous solutions such as seawater. We show that the nano-manganese-oxide particles have an R-MnO$$_{2}$$-type local crystal structure. The possible role of the protons on the surface of the nano-particles is discussed.

42 (Records 1-20 displayed on this page)