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Journal Articles

Strain measurement in Ti layers of CFRP/Ti laminates by synchrotron X-ray diffraction

Akita, Koichi; Nakatani, Hayato*; Ogihara, Shinji*; Shobu, Takahisa; Shiro, Ayumi*; Igawa, Naoki; Shimojo, Yutaka

SPring-8/SACLA Riyo Kenkyu Seikashu (Internet), 6(1), p.105 - 108, 2018/01

no abstracts in English

Journal Articles

Absence of a polar phase in perovskite chromite $$R$$CrO$$_{3}$$ ($$R$$=La and Pr)

Yoshii, Kenji; Ikeda, Naoshi*; Shimojo, Yutaka; Ishii, Yoshinobu*

Materials Chemistry and Physics, 190, p.96 - 101, 2017/04

 Times Cited Count:12 Percentile:54.62(Materials Science, Multidisciplinary)

Magnetic and dielectric properties have been studied for LaCrO$$_{3}$$, PrCrO$$_{3}$$, and their solid solution La$$_{0.5}$$Pr$$_{0.5}$$CrO$$_{3}$$, belonging to a family of ferroelectricorthochromite series $${it R}$$CrO$$_{3}$$ ($${it R}$$: rare earths). The magnetic measurements confirm that the material shows canted antiferromagnetic ordering at 240-288 K. Neutron diffraction patterns could be fitted with the centrosymmetric $${it Pnma}$$, which is different from the non-centrosymmetric structure proposed for the ferroelectric phase of NdCrO$$_{3}$$. The large dielectric constants are likely due to the hopping of charge carriers as proposed previously for other chromites.

JAEA Reports

Introduction of assistive devices for neutron scattering experiments

Shimojo, Yutaka; Ihata, Yoshiaki; Kaneko, Koji; Takeda, Masayasu

JAEA-Testing 2012-005, 63 Pages, 2013/02

JAEA-Testing-2012-005.pdf:11.94MB

Taking an advantage of high penetration capability of neutron, neutron scattering experiments can be performed under various sample environment, such as low (high) temperature, pressure, magnetic field and stress, and those complex conditions. To this aim, a number of sample environment accessories, refrigerators, furnaces, pressure cells, superconducting magnets are equipped in JRR-3 to be used for experiments. In this document, all available equipment in both JRR-3 reactor hall and guide hall are summarized. We hope this document would help neutron scattering users to perform effective, and excellent experiments.

Journal Articles

Magnetic and dielectric study of R$$_{0.5}$$Sr$$_{0.5}$$MnO$$_{3}$$ (R = Gd, Tb and Dy)

Yoshii, Kenji; Hiramitsu, Yusuke*; Okajima, Yuka*; Yoneda, Yasuhiro; Nishihata, Yasuo; Mizuki, Junichiro; Nakamura, Akio; Shimojo, Yutaka; Ishii, Yoshinobu*; Morii, Yukio; et al.

Materials Research Bulletin, 45(11), p.1574 - 1580, 2010/10

 Times Cited Count:12 Percentile:40.54(Materials Science, Multidisciplinary)

Magnetic and dielectric properties of perovskite manganites R$$_{0.5}$$Sr$$_{0.5}$$MnO$$_{3}$$ (R = Gd, Tb and Dy) have been investigated. DC and AC magnetic measurements showed short-range glassy magnetic ordering at Tg about 40 K. Such ordering was observed by neutron diffraction and is ascribable to the size mismatch of R$$^{3+}$$ and Sr$$^{3+}$$ settled randomly at the same crystallographic site. Dielectric constants for each material were about 1000-10000 between about 50 K and 300 K and showed broad maximums above Tg. Dielectric dispersion showed poor coherency of the motion of polar regions, plausibly because of the size-mismatch effect; both the magnetic and dielectric properties of this system are governed by the randomness at the R/Sr site. The tan$$delta$$ and EXAFS data suggest that the dielectric response is rooted in a transfer of the Mn-3d electrons.

JAEA Reports

Extraction and separation of uranium from simulated uranium-containing liquid wastes of Ningyo-toge environmental engineering center

Mitamura, Hisayoshi; Naganawa, Hirochika; Nagano, Tetsushi; Yanase, Nobuyuki; Hanzawa, Yukiko; Shimojo, Kojiro; Matsubara, Tatsuo; Mita, Yutaka; Taki, Tomihiro; Murata, Masato

JAEA-Research 2008-113, 27 Pages, 2009/03

JAEA-Research-2008-113.pdf:31.84MB

An effective mass processing equipment using solvent extraction method, named "emulsion flow extractor," is the most promising apparatus for removal and recovery of uranium from liquid waste originated from decontamination of uranium-contaminated fluoride waste in the uranium conversion test facility and of used gas centrifuges in the uranium enrichment facility at Ningyo-toge environmental engineering center. Prior to application of the emulsion flow extractor for actual uranium-containing liquid waste, properties of some phosphorous extractants for extraction and separation of uranium and constituents from simulated liquid wastes were examined through batch tests. These preliminary tests revealed that D2EHPA would be a promising candidate for extractant used for treatment of the actual uranium-containing liquid wastes, and that the extractants with a surfactant like AOT would not be useful.

Journal Articles

Double focusing Heusler monochromator and analyzer systems for the polarized neutron triple-axis spectrometer

Takeda, Masayasu; Nakamura, Mitsutaka; Shimojo, Yutaka; Kakurai, Kazuhisa

Nuclear Instruments and Methods in Physics Research A, 586(2), p.229 - 238, 2008/02

 Times Cited Count:1 Percentile:14.41(Instruments & Instrumentation)

The polarization analysis options on the thermal neutron triple-axis spectrometer TAS-1 at JRR-3 of Japan Atomic Energy Agency (JAEA) have been improved as a result of an upgrading program of the Advanced Science Research Center. In order to increase the polarized neutron intensity, we have replaced the previous flat polarizing Cu$$_2$$MnAl (Heusler) monochromator and analyzer with doubly focusing ones. Intensity gain factors of more than 30 have been achieved for 14.7 meV neutrons in measurements of incoherent neutron scattering of vanadium. Using the new monochromator and analyzer, elastic and inelastic polarized neutron scattering experiments with the conventional setup for one-dimensional polarization analysis and with CRYOPAD (Cryogenic Polarization Analysis Device) for three-dimensional polarization analysis are now routinely performed on TAS-1.

Journal Articles

Magnetic and dielectric properties of Tb$$_{0.5}$$Ca$$_{0.5}$$MnO$$_{3}$$

Hiramitsu, Yusuke*; Yoshii, Kenji; Yoneda, Yasuhiro; Mizuki, Junichiro; Nakamura, Akio; Shimojo, Yutaka; Ishii, Yoshinobu*; Morii, Yukio; Ikeda, Naoshi*

Japanese Journal of Applied Physics, Part 1, 46(10B), p.7171 - 7174, 2007/10

 Times Cited Count:15 Percentile:53.31(Physics, Applied)

Magnetic and dielectric properties of a perivskite manganite Tb$$_{0.5}$$Ca$$_{0.5}$$MnO$$_{3}$$ were investigated. Magnetic measurements showed three characteristic temperatures, originating from charge ordering (300 K), antiferromagnetic ordering (120 K) and a transition to a glassy state (50 K). The coexistence of the charge and antiferromagnetic ordering was consistent with the result of powder neutron diffraction. AC dielectric measurements showed large dielectric constants of about 5000 at around room temperature. A temperature dependence of the dielectric constant changed just below the charge-ordering temperature. From the analysis of tan$$delta$$;, the activation energy for a domain-boundary motion was calculated to be about 0.09 eV. These results strongly suggest that the dielectric properties of this material are governed by the ordering and transfer of the Mn-3d charges.

Journal Articles

Neutron diffraction and X-ray absorption study of Ag$$_{5}$$Pb$$_{2}$$O$$_{6}$$

Yoshii, Kenji; Mizumaki, Masaichiro*; Kato, Kazuo*; Uruga, Tomoya*; Abe, Hideki*; Nakamura, Akio; Shimojo, Yutaka; Ishii, Yoshinobu; Morii, Yukio

Journal of Solid State Chemistry, 180(1), p.377 - 381, 2007/01

 Times Cited Count:6 Percentile:25.64(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Neutron diffraction and X-ray absorption study of CaMn$$_{0.6}$$Ru$$_{0.4}$$O$$_{3}$$

Yoshii, Kenji; Nakamura, Akio; Mizumaki, Masaichiro*; Tanida, Hajime*; Kawamura, Naomi*; Abe, Hideki*; Ishii, Yoshinobu; Shimojo, Yutaka; Morii, Yukio

Journal of Magnetism and Magnetic Materials, 272-276(Suppl.), p.e609 - e611, 2004/05

 Times Cited Count:4 Percentile:26.12(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

A Focusing monochromator of neutron diffractometer for residual stress analysis (RESA)

Minakawa, Nobuaki; Morii, Yukio; Shimojo, Yutaka

Proceedings of 6th International Conference on Residual Stressess (ICRS-6), Vol.2, p.1107 - 1111, 2000/07

no abstracts in English

Journal Articles

Crystal structures and magnetic properties of Ca$$_{2-x}$$Sr$$_{x}$$MnO$$_{4}$$

*; *; Hinatsu, Yukio*; Shimojo, Yutaka; Morii, Yukio

Journal of Solid State Chemistry, 145(2), p.705 - 710, 1999/00

 Times Cited Count:24 Percentile:68.24(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Neutron diffraction study on hp13 type M$$_{7-x}$$Mn$$_{x}$$Ge$$_{6}$$(M=Co,Fe)

*; Tsuchiya, Yoshinori*; Funahashi, Satoru; *; Shimojo, Yutaka; *; *

J. Magn. Magn. Mater., 177-181, p.1425 - 1426, 1998/00

 Times Cited Count:6 Percentile:37.44(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Neutron diffraction and Moessbauer measurements for magnetism of Bcc Cr-Fe-Mn alloys

Tsuchiya, Yoshinori*; *; *; *; Shimojo, Yutaka; Morii, Yukio; *

J. Magn. Magn. Mater., 177-181, p.1447 - 1448, 1998/00

 Times Cited Count:5 Percentile:33.09(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic and neutron diffraction studies on potassium uranate KUO$$_{3}$$

Hinatsu, Yukio*; Shimojo, Yutaka; Morii, Yukio

Journal of Alloys and Compounds, 270, p.127 - 131, 1998/00

 Times Cited Count:8 Percentile:53.92(Chemistry, Physical)

no abstracts in English

Journal Articles

Magnetic and neutron diffraction study on perovskites La$$_{1-x}$$Sr$$_{x}$$CrO$$_{3}$$

*; Hinatsu, Yukio*; Nakamura, Akio; Inami, Toshiya; Shimojo, Yutaka; Morii, Yukio

Journal of Solid State Chemistry, 141, p.404 - 410, 1998/00

 Times Cited Count:81 Percentile:95.72(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Structural study of lithium titanogallate prepared by ion exchange via one-dimensional tunnel-like pathways

*; *; *; Watanabe, Mamoru*; *; Morii, Yukio; Shimojo, Yutaka

Solid State Ionics, 113-115, p.471 - 475, 1998/00

 Times Cited Count:3 Percentile:22.65(Chemistry, Physical)

no abstracts in English

Journal Articles

Moessbauer and neutron diffraction studies of BCC Cr-Fe-Mn ternary alloys

Tsuchiya, Yoshinori*; *; *; *; Shimojo, Yutaka; Morii, Yukio; *

Physica B; Condensed Matter, 237-238, p.446 - 448, 1997/00

 Times Cited Count:11 Percentile:59.33(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Diffuse neutron scattering from superionic phase of Ag$$_{2}$$Te

*; *; *; Shimojo, Yutaka; Morii, Yukio

Solid State Ionics, 86-88(PT.1), p.227 - 230, 1996/00

no abstracts in English

Journal Articles

Hexagonal ZrNiAl alloy and its hydride (deuteride) with the Fe$$_{2}$$P-type structure

*; *; Shimojo, Yutaka; Morii, Yukio; *

Journal of Alloys and Compounds, 231(1-2), p.755 - 759, 1995/00

 Times Cited Count:13 Percentile:67.21(Chemistry, Physical)

no abstracts in English

Journal Articles

Neutron diffraction study on the magnetic transitions of BCC Cr$$_{80-x}$$Fe$$_{20}$$Mn$$_{x}$$ alloys

Tsuchiya, Yoshinori*; *; *; *; Shimojo, Yutaka; Morii, Yukio; *

Physica B; Condensed Matter, 213-214, p.366 - 368, 1995/00

 Times Cited Count:0 Percentile:0.01(Physics, Condensed Matter)

no abstracts in English

37 (Records 1-20 displayed on this page)