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Journal Articles

The Investigation and consideration for introduction of surface contamination evaluation method based on JIS

Usui, Toshihide; Takashima, Hideki; Iwasa, Atsutoshi; Hamazaki, Masaaki

Proceedings of 3rd Asian and Oceanic Congress on Radiation Protection (AOCRP-3) (CD-ROM), 3 Pages, 2010/05

Journal Articles

Crystallization process of ferroelectric Bi$$_4$$Ti$$_3$$O$$_{12}$$ from amorphous state

Yoneda, Yasuhiro; Mizuki, Junichiro; Kohara, Shinji*; Hamazaki, Shinichi*; Takashige, Masaaki*

Journal of Applied Physics, 99(7), p.074108_1 - 074108_5, 2006/04

 Times Cited Count:4 Percentile:17.99(Physics, Applied)

no abstracts in English

Journal Articles

X-ray diffraction topography on ferroelectric materials

Yoneda, Yasuhiro; Komura, Yoshiki*; Suzuki, Yoshio*; Hamazaki, Shinichi*; Takashige, Masaaki*; Mizuki, Junichiro

Transactions of the Materials Research Society of Japan, 30(1), p.51 - 54, 2005/03

no abstracts in English

Journal Articles

X-ray topography on domain-controlled BaTiO$$_3$$ crystals

Yoneda, Yasuhiro; Mizuki, Junichiro; Komura, Yoshiki*; Suzuki, Yoshio*; Hamazaki, Shinichi*; Takashige, Masaaki*

Japanese Journal of Applied Physics, 43(9B), p.6821 - 6824, 2004/09

 Times Cited Count:9 Percentile:38.76(Physics, Applied)

no abstracts in English

Journal Articles

X-ray diffraction topography on a BaTiO$$_3$$ crystal

Yoneda, Yasuhiro; Komura, Yoshiki*; Suzuki, Yoshio*; Hamazaki, Shinichi*; Takashige, Masaaki*

Journal of the Physical Society of Japan, 73(4), p.1050 - 1053, 2004/04

We have observed 90 $$^{circ}$$C domain walls in a bulk BaTiO$$_3$$ crystal by Synchrotron radiation topography, coupled with a CCD detector. The BaTiO$$_3$$ multi-domain crystal was revealed to be strained at the 90 $$^{circ}$$C domain boundary. The polar direction of the BaTiO$$_3$$ crystal was tilted by this starin, and this strain also causes the irregular angle of the surface bending mode. The Synchrotron X-ray topography can be performed on a sample with electrodes. The topographic image of the ferroelectric doamin with an electric field clarified that the well-known stripe domain configuration can not be observed without a weak electric field due to the lattice strain at the doamin boundary.

Journal Articles

X-ray diffraction topography on a BaTiO$$_3$$ crystal

Yoneda, Yasuhiro; Komura, Yoshiki*; Suzuki, Yoshio*; Hamazaki, Shinichi*; Takashige, Masaaki*

Journal of the Physical Society of Japan, 73(4), p.1050 - 1053, 2004/04

 Times Cited Count:9 Percentile:52.17(Physics, Multidisciplinary)

We have observed 90$$^{circ}$$ domain walls in a bulk BaTiO$$_3$$ crystal by Synchrotron radiation topography, coupled with a CCD detector. The BaTiO$$_3$$ multi-domain crystal was revealed to be strained at the 90$$^{circ}$$ domain boundary. The polar direction of the BaTiO$$_3$$ crystal was tilted by this starin, and this strain also causes the irregular angle of the surface bending mode. The Synchrotron X-ray topography can be performed on a sample with electrodes. The topographic image of the ferroelectric doamin with an electric field clarified that the well-known stripe domain configuration can not be observed without a weak electric field due to the lattice strain at the doamin boundary.

Journal Articles

Stacking-fault-induced intermediate structure in bismuth titanate

Yoneda, Yasuhiro; Mizuki, Junichiro; Katayama, Ryoko*; Yagi, Kenichiro*; Terauchi, Hikaru*; Hamazaki, Shinichi*; Takashige, Masaaki*

Applied Physics Letters, 83(2), p.275 - 277, 2003/07

 Times Cited Count:18 Percentile:58.76(Physics, Applied)

We observed an intermediate structure during the re-crystallization process from the amorphous state of Bi$$_4$$Ti$$_3$$O$$_{12}$$ prepared by rapid quenching. The intermediate structure which appears during the re-crystallization process consists of two phases; one is pyrochlore Bi$$_2$$Ti$$_2$$O$$_7$$ phase and the other is a stacking-fault induced structure under the excessive Bi condition. The microstructure of the stacking-fault induced structure was investigated by synchrotron X-ray diffraction. In the case of a large number of Bi$$_2$$O$$_2$$, some are inserted between the pseudo-perovskite layers of Bi$$_4$$Ti$$_3$$O$$_{12}$$, and a non-stoichiometric Bi$$_2$$WO$$_6$$-like structure is stabilized.

Oral presentation

Influence and countermeasure of introduction of surface contamination evaluation method based on JIS

Ishida, Keiichi; Mikami, Satoshi; Iwasa, Atsutoshi; Hamazaki, Masaaki; Usui, Toshihide; Takashima, Hideki; Hitomi, Junichi

no journal, , 

no abstracts in English

Oral presentation

Temporal facility radiation control activities in JAEA research reactor plants under ascended radiation levels due to the accident of Fukushima Daiichi Nuclear Plants

Irokawa, Hiroyuki; Hamazaki, Masaaki; Ishida, Keiichi; Miura, Yoshiyuki; Iwasa, Atsutoshi; Kano, Yutaka; Mikami, Satoshi; Takashima, Hideki; Hitomi, Junichi

no journal, , 

no abstracts in English

Oral presentation

The Training for young educators to learn the correct understanding about handling of radioactive materials and radiation

Usui, Toshihide; Nakayama, Naoto; Iwasa, Atsutoshi; Miura, Yoshiyuki; Ishida, Keiichi; Irokawa, Hiroyuki; Hamazaki, Masaaki; Okawa, Yasuhisa; Iwai, Ryo

no journal, , 

no abstracts in English

Oral presentation

Radiation management for work in hot cell contaminated by high level radioactive materials

Nakayama, Naoto; Iwasa, Atsutoshi; Hamazaki, Masaaki; Sumiya, Yoshinobu*; Ogiya, Takashi; Irokawa, Hiroyuki; Kano, Yutaka; Takashima, Hideki; Hitomi, Junichi

no journal, , 

no abstracts in English

Oral presentation

The Effect of leakage rates on the difference of states wearing respirator

Nakayama, Naoto; Yatsuda, Kazumi; Hamazaki, Masaaki; Usui, Toshihide; Nakada, Akira

no journal, , 

no abstracts in English

Oral presentation

Characterization of removal factor of materials used for smear method on house material

Hamazaki, Masaaki; Mori, Airi; Abe, Haruka; Goibuchi, Shota; Iwasa, Atsutoshi; Ishida, Keiichi; Usui, Toshihide; Eguchi, Kazutoshi; Nakada, Akira

no journal, , 

no abstracts in English

13 (Records 1-13 displayed on this page)
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