JOPSS - Search Results

Journal Articles

Ultralow-energy magnon anomaly in yttrium iron garnet

Shamoto, Shinichi; Yasui, Yukio*; Matsuura, Masato*; Akatsu, Mitsuhiro*; Kobayashi, Yoshiaki*; Nemoto, Yuichi*; Ieda, Junichi

Physical Review Research (Internet), 2(3), p.033235_1 - 033235_6, 2020/08

https://doi.org/10.1103/PhysRevResearch.2.033235

Ultralow energy magnon in yttrium iron garnet crystal has been studied by inelastic neutron scattering in an energy range from 10 to 45 eV. When a magnetic field of about 0.1 T is applied along [111], ultralow energy magnon anomaly is found at 10 K.

Journal Articles

Local structure study of the iron-based systems of BaFeAs and LiFeAs by X-ray PDF and XAFS analyses

Li, S.*; Toyoda, Masayuki*; Kobayashi, Yoshiaki*; Ito, Masayuki*; Ikeuchi, Kazuhiko*; Yoneda, Yasuhiro; Otani, Akira*; Matsumura, Daiju; Asano, Shun*; Mizuki, Junichiro*; et al.

Physica C, 555, p.45 - 53, 2018/12

https://doi.org/10.1016/j.physc.2018.10.003

Times Cited Count：1 Percentile：4.99(Physics, Applied)

-dependence of local distortions in BaFeAs and LiFeAs by X-ray PDF and XAFS methods. Although PDF data exhibit anomaly at the structure transition temperature, EXAFS data exhibit no anomaly. Data supporting the local orthorhombicity at 300 K in the tetragonal phase for BaFeAs. Arguments on the origins of the 4-fold symmetry breaking in the ground average structure of the tetragonal phase.

Journal Articles

Phonons of Fe-based superconductor Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$

Ikeuchi, Kazuhiko*; Kobayashi, Yoshiaki*; Suzukia, Kazunori*; Ito, Masayuki*; Kajimoto, Ryoichi; Bourges, P.*; Christianson, A. D.*; Nakamura, Hiroki; Machida, Masahiko; Sato, Masatoshi*

Journal of Physics; Condensed Matter, 27(46), p.465701_1 - 465701_7, 2015/11

https://doi.org/10.1088/0953-8984/27/46/465701

Times Cited Count：1 Percentile：4.78(Physics, Condensed Matter)

We report the results of inelastic neutron scattering measurements on particular phonons of a superconducting (SC) Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$ with the onset transition temperature K to investigate mainly what roles orbital fluctuation plays in Cooper pairing, where we observed a slight softening of the in-plane transverse acoustic mode corresponding to the elastic constant $C_{66}$ . This softening starts at temperature well above the SC , as decreases. An anomalously strong change of the scattering intensity of in-plane optical modes was observed at the M point of the pseudo tetragonal reciprocal space in the range of 35 40 meV with decreasing from far above . Because this region mainly corresponds to the motion of Fe and As atoms in the FeAs planes, the finding presents information on the coupling between the orbital fluctuation of Fe electrons and the lattice system, useful for studying the possible roles of orbital fluctuation in the pairing mechanism and/or the appearance of the so-called nematic phase.

Journal Articles

Superconducting transition temperature and the thickness of CuO $_{2}$ planes of Na $_{x}$ CoO $_{2}$ yH $_{2}$ O

Moyoshi, Taketo*; Kobayashi, Yoshiaki*; Yasui, Yukio*; Sato, Masatoshi*; Kakurai, Kazuhisa

Solid State Sciences, 12(5), p.656 - 659, 2010/05

https://doi.org/10.1016/j.solidstatesciences.2008.09.016

Times Cited Count：0 Percentile：0.01(Chemistry, Inorganic & Nuclear)

Journal Articles

Structural studies of pyrochlore-related spin-1/2 system Ag $_{2}$ Cu $_{2}$ O $_{3}$

Uematsu, Daisuke*; Soda, Minoru*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Igawa, Naoki; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 75(12), p.124601_1 - 124601_5, 2006/12

https://doi.org/10.1143/JPSJ.75.124601

Times Cited Count：0 Percentile：0(Physics, Multidisciplinary)

The close coupling of the crystal distortion to the magnetic ordering in Ag $_{2}$ Cu $_{2}$ O $_{3}$ at 70K has been found by X-ray and neutron diffraction analyses and magnetic measurements. The system has a pyrochlore-related structure with corner-sharing tetrahedra of Cu $^{2+}$ ions, in which the geometrical frustration is inherent. We report how the structural distortion releases the frustration, stabilizing the magnetic ordered state.

Journal Articles

Search for magnetic excitation spectra of Na $_{x}$ CoO $_{2}$ $_{y}$ D $_{2}$ O; Neutron scattering

Moyoshi, Taketo*; Yasui, Yukio*; Soda, Minoru*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 75(7), p.074705_1 - 074705_6, 2006/07

https://doi.org/10.1143/JPSJ.75.074705

Times Cited Count：11 Percentile：56.28(Physics, Multidisciplinary)

Neutron scattering investigations on single crystal Na $_{x}$ CoO $_{2}$ y(D $_{2}$ O) have been carried out. Strong 2-D diffuse scattering due to the short-range ordered state of D $_{2}$ O molecules are observed. Significant scattering has been also observed for phonons originating from the vibrations of the short-range ordered D $_{2}$ O molecules. No firm evidence for the magnetic fluctuations has been found for the hydrated superconducting component Na $_{x}$ CoO $_{2}$ y(D $_{2}$ O), while the very weak intensity modulation observed in the scans along (1/2,1/2,l) suggests the existence of the antiferromagnetic fluctuations in the non-hydrated parts of the sample.

Journal Articles

Magnetic structure and the hall resistivity of Cu $_{1-x}$ Zn $_{x}$ Cr $_{2}$ Se $_{4}$

Iikubo, Satoshi*; Yasui, Yukio*; Oda, Keisuke*; Ono, Yohei*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 71(11), p.2792 - 2799, 2002/11

https://doi.org/10.1143/JPSJ.71.2792

Times Cited Count：11 Percentile：56.87(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Long term leaching test of low level radioactive homogeneous solidified waste; Cumulative leaching ratio vs. pH of land water

; ; Takeda, Tsuneo; Muraoka, Susumu;

Hoshasei Haikibutsu Kenkyu Renrakukai Rombunshu, VI, p.64 - 75, 1991/00

no abstracts in English

JAEA Reports

Fission Rate Distributions on Assemblies FCA V-3, V-3B and V-2-R

; ; *; ; *; *; ;

JAERI-M 9056, 38 Pages, 1980/09

JAERI-M-9056.pdf:1.14MB

no abstracts in English

JAEA Reports

Experiment and Analysis of B $_{4}$ C Simulateing Control Rod on FCA V-3 Assembly

; *; ; Iijima, Tsutomu; *; ;

JAERI-M 9055, 63 Pages, 1980/09

JAERI-M-9055.pdf:2.07MB

no abstracts in English

JAEA Reports

Experiment and analysis of B $_{4}$ C simulating control rod on FCA V-3 assembly, 1; Neutron source multiplication method

; *; ; Iijima, Tsutomu; *; ;

JAERI-M 5867, 84 Pages, 1974/11

JAERI-M-5867.pdf:2.53MB

no abstracts in English

Oral presentation

The Superconductivity and magnetism of the hydrate of Na $_{x}$ CoO $_{2}$

Moyoshi, Taketo*; Yokoi, Mai*; Soda, Minoru*; Yasui, Yukio*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Igawa, Naoki; Kakurai, Kazuhisa

no journal, ,

no abstracts in English

Oral presentation

Magnetic structures and multiferroic properties of LiCu $_{2}$ O $_{2}$ ; Neutron scattering

Yasui, Yukio*; Sato, Kenji*; Moyoshi, Taketo*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa

no journal, ,

no abstracts in English

Presentation/Publication Type

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Ultralow-energy magnon anomaly in yttrium iron garnet

Local structure study of the iron-based systems of BaFeAs and LiFeAs by X-ray PDF and XAFS analyses

Phonons of Fe-based superconductor Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$

Superconducting transition temperature and the thickness of CuO $_{2}$ planes of Na $_{x}$ CoO $_{2}$ yH $_{2}$ O

Structural studies of pyrochlore-related spin-1/2 system Ag $_{2}$ Cu $_{2}$ O $_{3}$

Search for magnetic excitation spectra of Na $_{x}$ CoO $_{2}$ $_{y}$ D $_{2}$ O; Neutron scattering

Magnetic structure and the hall resistivity of Cu $_{1-x}$ Zn $_{x}$ Cr $_{2}$ Se $_{4}$

Long term leaching test of low level radioactive homogeneous solidified waste; Cumulative leaching ratio vs. pH of land water

Fission Rate Distributions on Assemblies FCA V-3, V-3B and V-2-R

Experiment and Analysis of B $_{4}$ C Simulateing Control Rod on FCA V-3 Assembly

Experiment and analysis of B $_{4}$ C simulating control rod on FCA V-3 assembly, 1; Neutron source multiplication method

The Superconductivity and magnetism of the hydrate of Na $_{x}$ CoO $_{2}$

Magnetic structures and multiferroic properties of LiCu $_{2}$ O $_{2}$ ; Neutron scattering