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Cu
O
Ishikawa, Norito; Chimi, Yasuhiro; Michikami, Osamu*; Iwase, Akihiro*
Nuclear Instruments and Methods in Physics Research B, 315, p.201 - 205, 2013/11
Times Cited Count：0 Percentile：0.01(Instruments & Instrumentation)High-energy X-ray was irradiated to EuBaCuO, which is one of the REBaCuOy (RE=rare earth) compounds, at low temperature (100 K), and the electrical resistivity was measured in situ at the same temperature (100 K). The X-ray energy was chosen near Cu K-edge (9.0 keV), Eu L3-edge (7.0 keV) and Ba L3-edge (5.2 keV) so that the effect of inner-shell excitation can be detected, if any. The irradiation-induced increase in the electrical resistivity is observed during the irradiations with X-ray in the energy range of 5-9 keV. The electrical resistivity monotonically increases as increasing photon dose. Even if the X-ray is switched off, the irradiation-induced effect remains unchanged. The observed effect has an opposite trend compared with that observed for the visible light irradiation which causes persistent photoconductivity. It is also found that the irradiation-induced increase in resistivity scales with the energy absorbed by EuBaCuO.
Ishikawa, Norito; Ohara, Kota; Ota, Yasuyuki*; Michikami, Osamu*
Nuclear Instruments and Methods in Physics Research B, 268(19), p.3273 - 3276, 2010/10
Times Cited Count：10 Percentile：56.82(Instruments & Instrumentation)In this experiment, CeO thin films are irradiated with 200 MeV Au to investigate the damage created by electronic energy deposition. The damage is studied by Raman spectroscopy.
irradiated with high-energy ions by means of X-ray diffraction measurementIshikawa, Norito; Chimi, Yasuhiro; Michikami, Osamu*; Ota, Yasuyuki*; Ohara, Kota; Lang, M.*; Neumann, R.*
Nuclear Instruments and Methods in Physics Research B, 266(12-13), p.3033 - 3036, 2008/06
Times Cited Count：43 Percentile：92.4(Instruments & Instrumentation)Cerium dioxide films are irradiated with high-energy heavy ions with the energy range of 150 MeV to 2.7 GeV, and X-ray diffraction profile is examined. As a result, the data can be explained by creation of nanometer-size ion track with disordered lattice structure, and the ion track is oxygen deficient.
CuOSato, H.*; Ishikawa, Norito; Iwase, Akihiro; Chimi, Yasuhiro; Hashimoto, Takeo*; Michikami, Osamu*
Physica C, 378-381(Part1), p.527 - 530, 2002/10
no abstracts in English
-scaling of lattice parameter change in high ion-velocity region (
2.6
10
cm/s) in ion-irradiated EuBaCuOIshikawa, Norito; Iwase, Akihiro; Chimi, Yasuhiro; Michikami, Osamu*; Wakana, Hironori*; Hashimoto, Takeo*; Kambara, Tadashi*; M
ller, C.*; Neumann, R.*
Nuclear Instruments and Methods in Physics Research B, 193(1-4), p.278 - 282, 2002/06
Times Cited Count：8 Percentile：47.9(Instruments & Instrumentation)Swift heavy ions with wide energy range of 80MeV-3.84GeV have been irradiated to EuBaCuO oxide superconductors, and the lattice parameter change due to elecronic excitation has been measured. In the high ion-velocity region, the change in lattice parameter per unit fluence varies as the 4th power of the electronic stopping power. However, in the low-velocity region, the deviation from the 4th power dependence is observed. The results are analyzed by using the primary ionization rate, and it is found that the results support that the Coulomb explosion triggers the atomic displacements.
CuOIshikawa, Norito; Iwase, Akihiro; Chimi, Yasuhiro; Michikami, Osamu*; Wakana, Hironori*; Hashimoto, Takeo*
Nuclear Instruments and Methods in Physics Research B, 191(1-4), p.606 - 609, 2002/05
Times Cited Count：1 Percentile：12.5(Instruments & Instrumentation)no abstracts in English
Ishikawa, Norito; Iwase, Akihiro; Chimi, Yasuhiro; Michikami, Osamu*; Wakana, Hironori*; Kambara, Tadashi*
Journal of the Physical Society of Japan, 69(11), p.3563 - 3575, 2000/11
Times Cited Count：9 Percentile：52.88(Physics, Multidisciplinary)no abstracts in English
CuOyIshikawa, Norito; Chimi, Yasuhiro; Iwase, Akihiro; Wakaba, H.*; Michikami, Osamu*
Nuclear Instruments and Methods in Physics Research B, 164-165, p.384 - 390, 2000/04
Times Cited Count：1 Percentile：20.05(Instruments & Instrumentation)no abstracts in English
Ishikawa, Norito; Chimi, Yasuhiro; Iwase, Akihiro; *; Michikami, Osamu*
Journal of Nuclear Materials, 258-263, p.1924 - 1928, 1998/00
Times Cited Count：9 Percentile：60.39(Materials Science, Multidisciplinary)no abstracts in English
CuOy irradiated with energetic ions at low temperatureIshikawa, Norito; Chimi, Yasuhiro; Iwase, Akihiro; *; Michikami, Osamu*
Mat. Res. Soc. Symp. Proc., 504, p.171 - 175, 1998/00
no abstracts in English
Ishikawa, Norito; Chimi, Yasuhiro; Iwase, Akihiro; Maeta, Hiroshi; *; Michikami, Osamu*; Kambara, Tadashi*; *; *; Terasawa, M.*
Nuclear Instruments and Methods in Physics Research B, 135, p.184 - 189, 1998/00
Times Cited Count：15 Percentile：73.06(Instruments & Instrumentation)no abstracts in English
CuOIwase, Akihiro; Ishikawa, Norito; Chimi, Yasuhiro; Wakana, Hironori*; Michikami, Osamu*; Kambara, Tadashi*; *
Nuclear Instruments and Methods in Physics Research B, 146(1-4), p.557 - 564, 1998/00
Times Cited Count：20 Percentile：80.42(Instruments & Instrumentation)no abstracts in English
Ishikawa, Norito; Chimi, Yasuhiro; Iwase, Akihiro; *; Michikami, Osamu*; Kambara, Tadashi*
RIKEN Accelerator Progress Report, 31, P. 97, 1998/00
no abstracts in English
Ishikawa, Norito; Chimi, Yasuhiro; Michikami, Osamu*; Ota, Yasuyuki*; Motohashi, Haruhiko*; Iwase, Akihiro*
no journal, ,
Electrically Conducting Ceramics EuBaCuOy thin film has been irradiated with monocromatic high-energy X-ray with the energy in the range of 5-9keV, and the X-ray energy dependence of the irradiation effect has been investigated. Electrical resistivity increase reflecting lattice defect creation has been observed as a result of X-ray irradiation. Moreover, the increase in the resistivity is found to be determined by the total energy absorbed by the irradiated sample. This result indicates that ionization can create lattice defects even if the ionization density is not high as in the case of high-energy ion irradiation.
Ishikawa, Norito; Chimi, Yasuhiro; Michikami, Osamu*; Ota, Yasuyuki*; Saito, Yuichi; Chiba, Atsuya; Fukuzumi, Masafumi*; Hori, Fuminobu*; Iwase, Akihiro*
no journal, ,
no abstracts in English
irradiated with high-energy ionsOhara, Kota; Ishikawa, Norito; Sakai, Seiji; Michikami, Osamu*; Ota, Yasuyuki*
no journal, ,
no abstracts in English
, 2Ohara, Kota; Ishikawa, Norito; Sakai, Seiji; Matsumoto, Yoshihiro; Michikami, Osamu*; Ota, Yasuyuki*; Kimura, Yutaka*
no journal, ,
High energy ion irradiation is performed for CeO ceramics. X-ray diffraction and raman spectroscopy analysis suggest that oxygen-deficient ion-track is formed after the irradiation.
irradiated with high energy ions, 3Ohara, Kota; Ishikawa, Norito; Sakai, Seiji; Matsumoto, Yoshihiro; Michikami, Osamu*; Ota, Yasuyuki*; Kimura, Yutaka*
no journal, ,
Irradiation-induced new X-ray diffraction peak is analyzed based on the model that nano-meter size ion tracks are formed in ion-irradiated CeO. X-ray diffraction profile can be interpreted by taking account of overlapping effect.
