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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

https://doi.org/10.1016/j.physb.2017.09.087
 Times Cited Count：3 Percentile：15.56(Physics, Condensed Matter)

Journal Articles

Liquid-like thermal conduction in intercalated layered crystalline solids

Li, B.; Wang, H.*; Kawakita, Yukinobu; Zhang, Q.*; Feygenson, M.*; Yu, H. L.*; Wu, D.*; Ohara, Koji*; Kikuchi, Tatsuya*; Shibata, Kaoru; et al.

Nature Materials, 17(3), p.226 - 230, 2018/03

https://doi.org/10.1038/s41563-017-0004-2
 Times Cited Count：121 Percentile：96.83(Chemistry, Physical)

Journal Articles

Neutron scattering study of spin fluctuations in La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$ by four-dimensional mapping of neutron cross-sections using the 4SEASONS chopper spectrometer

Wakimoto, Shuichi; Ikeuchi, Kazuhiko*; Arai, Masatoshi; Fujita, Masaki*; Kajimoto, Ryoichi; Kawamura, Sho*; Matsuura, Masato*; Nakajima, Kenji; Yamada, Kazuyoshi*

JPS Conference Proceedings (Internet), 8, p.034013_1 - 034013_6, 2015/09

https://doi.org/10.7566/JPSCP.8.034013

Journal Articles

Development of a neutron-imaging detector based on pulse-height correlation between two superconducting tunnel junctions on a Li$$_{2}$$B$$_{4}$$O$$_{7}$$ crystal

Nakamura, Tatsuya; Katagiri, Masaki; Chen, Y. E.*; Ukibe, Masahiro*; Okubo, Masataka*

Nuclear Instruments and Methods in Physics Research A, 559(2), p.766 - 768, 2006/04

https://doi.org/10.1016/j.nima.2005.12.131
 Times Cited Count：13 Percentile：65.83(Instruments & Instrumentation)

We have been developing a position-sensitive neutron detector, which exhibits a high spatial resolution of the order of 10 microns and high detection efficiency. The analysis on the pulse-heights or on the time-delay between the STJs gives incident positions of the neutrons. In this paper, the response of the STJs/LBO neutron detector measured using a cold neutron beam is presented. The two STJs have the same size of 50 $$times$$ 50 $$mu$$ m$$^{2}$$ and their distance is 1.3 mm. The count intensity in the correlation map varied depending on the incident position of the neutron beam which gives an evidence for the position-sensitivity of the detector. These experimental results were qualitatively understood by a simple solid-angle model.

Journal Articles

Doping dependence of softening in the bond-stretching phonon mode of La$$_{2-x}$$Sr$$_x$$CuO$$_4$$ (0$$leq x leq$$0.29)

Fukuda, Tatsuo; Mizuki, Junichiro; Ikeuchi, Kazuhiko*; Yamada, Kazuyoshi*; Baron, A. Q. R.*; Tsutsui, Satoshi*

Physical Review B, 71(6), p.060501_1 - 060501_4, 2005/02

https://doi.org/10.1103/PhysRevB.71.060501
 Times Cited Count：58 Percentile：86.24(Materials Science, Multidisciplinary)

Phonons along the [100] direction, in particular the highest energy Cu-O bond-stretching LO mode, of La$$_{2-x}$$Sr$$_x$$CuO$$_4$$ have been studied by inelastic X-ray scattering experiments. The LO phonon mode in the $$x$$ = 0.12 sample shows significant softening similar to early neutron studies. We show here a recovery of the softening was found in the $$x$$ = 0.29 sample, where superconductivity degrades and normal metallic conductivity dominates. The results suggest one-to-one correspondence between the softening of this LO phonon and the superconductivity.

Journal Articles

Phonon anomaly on Na$$_x$$HfNCl superconductors with ${it T}$$$_c$$=22 K

Shamoto, Shinichi; Hirai, Atsuo*; Yamanaka, Shoji*; Aso, Naofumi*; Kajitani, Tsuyoshi*

Journal of Neutron Research, 12(4), p.295 - 300, 2004/12

https://doi.org/10.1080/10238160412331299474

Inelastic neutron scattering measurements have been performed on superconducting Na$$_x$$HfNCl powder samples with x=0.27 and 0.38 (T$$_c$$ =22 K). We have observed several temperature dependent phonon anomalies, e.g., at E=15, 29, 76, and 81 meV for the former sample. A phonon peak with E=14.5 meV at Q=6 $AA $^{-1}$$ increases for both samples with decreasing temperature below T=40 K, which is much higher than T$$_c$$. The phonon peak is assigned to an ab-plane vibrational mode, E$$_u$$, of chlorine and hafnium atoms, which strongly modifies the electronic band structure. The phonon anomaly is discussed in terms of carrier inhomogeneity.

Journal Articles

Discrimination of neutrons and $$gamma$$ ray by a neutron detector comprising a superconducting tunnel junction on a single crystal of Li$$_{2}$$B$$_{4}$$O$$_{7}$$

Nakamura, Tatsuya; Katagiri, Masaki; Soyama, Kazuhiko; Ukibe, Masahiro*; Ikeuchi, Takashi*; Okubo, Masataka*

Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.402 - 404, 2004/08

https://doi.org/10.1016/j.nima.2004.05.020
 Times Cited Count：8 Percentile：48.81(Instruments & Instrumentation)

We evaluated the neutron-$$gamma$$-rays discrimination of the neutron detector comprising a superconducting tunnel junction (STJ) on the single crystal of Li$$_{2}$$B$$_{4}$$O$$_{7}$$. The neutron detector was irradiated with X-rays, $$gamma$$-rays and neutrons, and the signal pulses were analyzed including pulse height distributions and rise times. It was found that the most of the signal pulses for the neutron-events exhibited slower rise times than those for X-rays and $$gamma$$-rays. This indicated the capability of neutron-$$gamma$$-rays discrimination of the detector using the differences in the decay time of the signal current.

Journal Articles

Neutron science and high pressure; Inelastic neutron scattering associated with pressure-induced phase transition

Fujii, Yasuhiko

Koatsuryoku No Kagaku To Gijutsu, 14(2), p.113 - 118, 2004/05

https://doi.org/10.4131/jshpreview.14.113

no abstracts in English

Journal Articles

Phonon density of states in Sr$$_{2}$$FeCoO$$_{6-delta}$$ and SrBaFeCoO$$_{6-delta}$$; Effects induced by magnetic order and transport coherence

Rykov, A. I.*; Nomura, Kiyoshi*; Sawada, Tsuguo*; Mitsui, Takaya; Seto, Makoto*; Tamegai, Tsuyoshi*; Tokunaga, Masashi*

Physical Review B, 68(22), p.224401_1 - 224401_7, 2003/12

https://doi.org/10.1103/PhysRevB.68.224401
 Times Cited Count：8 Percentile：42.93(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Site-specific phonon density of states discerned using electronic states

Seto, Makoto; Kitao, Shinji*; Kobayashi, Yasuhiro*; Haruki, Rie*; Yoda, Yoshitaka*; Mitsui, Takaya; Ishikawa, Tatsuo*

Physical Review Letters, 91(18), p.185505_1 - 185505_4, 2003/10

https://doi.org/10.1103/PhysRevLett.91.185505
 Times Cited Count：31 Percentile：78.04(Physics, Multidisciplinary)

no abstracts in English

JAEA Reports

Temperature dependence of lattice vibrations and analysis of specific heat in graphite (Cooperative research)

Nihira, Takeshi*; Iwata, Tadao*; Iwase, Akihiro

JAERI-Research 2001-045, 33 Pages, 2001/11

JAERI-Research-2001-045.pdf:1.27MB

no abstracts in English

Journal Articles

Thermal conductivity of technetium

Minato, Kazuo; Serizawa, Hiroyuki; Fukuda, Kosaku

Journal of Alloys and Compounds, 267, p.274 - 278, 1998/00

https://doi.org/10.1016/S0925-8388(97)00514-8
 Times Cited Count：7 Percentile：49.92(Chemistry, Physical)

no abstracts in English

Journal Articles

Optically active vibrations of doped lanthanum copper oxide compound(La$$_{2-x}$$M$$_{x}$$CuO$$_{4}$$)

;

Applied Spectroscopy, 47(3), p.296 - 299, 1993/00

https://doi.org/10.1366/0003702934066631
 Times Cited Count：2 Percentile：36.77(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Lattice instability of premartensitic $$beta$$$$_{1}$$ phase in Cu$$_{3}$$Al(+Pd) alloy under uniaxial pressure

*; *; Morii, Yukio; ; Funahashi, Satoru

Mater. Trans. JIM, 33(3), p.203 - 207, 1992/03

https://doi.org/10.2320/matertrans1989.33.203
 Times Cited Count：17 Percentile：75.77(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Defect recovery in FCC metals irradiated with 0.5 - 126 MeV energetic ions

Iwase, Akihiro; Iwata, Tadao; Nihira, Takeshi*; Sasaki, Shigemi

Mater. Sci. Forum, 97-99, p.605 - 614, 1992/00

no abstracts in English

Journal Articles

Lattice instability in $$beta$$$$_{1}$$-AgZn

Morii, Yukio; *; *; Funahashi, Satoru; H.R.Child*; R.M.Nicklow*

Journal of the Physical Society of Japan, 60(12), p.4160 - 4166, 1991/12

https://doi.org/10.1143/JPSJ.60.4160
 Times Cited Count：3 Percentile：41.04(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Radiation annealing in nickel and copper by 100 MeV iodine ions

Iwase, Akihiro; Iwata, Tadao; Sasaki, Shigemi; Nihira, Takeshi*

Journal of the Physical Society of Japan, 59(4), p.1451 - 1457, 1990/04

https://doi.org/10.1143/JPSJ.59.1451
 Times Cited Count：12 Percentile：67.54(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Optically active vibrations of lanthanum copper oxide compound(La$$_{2}$$CuO$$_{4}$$)

Spectrochimica Acta, Part A, 45(11), p.1137 - 1143, 1989/11

no abstracts in English

Journal Articles

The Effect of gadolinium content on the thermal conductivity of near-stoichiometric(U,Gd)O$$_{2}$$ solid solutions

; ; ;

Journal of Nuclear Materials, 105(2), p.201 - 210, 1982/00

https://doi.org/10.1016/0022-3115(82)90375-0
 Times Cited Count：82 Percentile：98.6(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Thermal conductivity of irradiated graphite

*;

Point Defects and Defect Interactions in Metals, p.236 - 238, 1982/00

no abstracts in English

27 (Records 1-20 displayed on this page)