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Tamegai, Tsuyoshi*; Taen, Toshihiro*; Yagyuda, Hidenori*; Tsuchiya, Yuji*; Mohan, S.*; Taniguchi, Tomotaka*; Nakajima, Yasuyuki*; Okayasu, Satoru; Sasase, Masato*; Kitamura, Hisashi*; et al.
Superconductor Science and Technology, 25(8), p.084008_1 - 084008_14, 2012/08
Times Cited Count：86 Percentile：93.27(Physics, Applied)Various kinds of energetic particles are irradiated into iron-based superconductors, and their effects on the critical current density 
and vortex dynamics have been systematically studied. It is found that is enhanced and vortex dynamics is strongly suppressed by energetic particles having a sufficient energy deposition rate, similar to the case of high temperature cuprate superconductors. The enhancement of , in general, persists up to much higher irradiation doses than in cuprates. However, details of the effect of irradiation depend on the kind of ion species and their energies. Even with the same ions and energies, the effect is not universal for different kinds of iron-based superconductors. The correlated nature of defects created by heavy-ion irradiation is confirmed by the angular dependence of irreversible magnetization.
Tamegai, Tsuyoshi*; Taen, Toshihiro*; Yagyuda, Hidenori*; Nakajima, Yasuyuki*; Okayasu, Satoru; Sasase, Masato*; Kitamura, Hisashi*; Murakami, Takeshi*; Kambara, Tadashi*; Kanai, Yasuyuki*
Physica C, 471, p.777 - 780, 2011/00
Times Cited Count：6 Percentile：29.18(Physics, Applied)Magnetic relaxations in Ba(Fe
Co
)
As before and after swift particle irradiations are measured. The normalized relaxation rate S shows a clear suppression in a pristine sample at low fields below the self-field. Heavy-ion irradiations suppress these anomalies considerably, although there still remain weak features depending on ion species and/or energies. In a proton irradiated sample, the low-field anomaly of S survives although it is smeared compared with that in a pristine sample. All these results indicate that the low-field anomaly of S is suppressed by defects, and correlated defects have stronger effects.
Imai, Makoto*; Sataka, Masao; Kitazawa, Shinichi; Komaki, Kenichiro*; Kawatsura, Kiyoshi*; Shibata, Hiromi*; Tawara, Hiroyuki*; Azuma, Toshiyuki*; Kanai, Yasuyuki*; Yamazaki, Y.*
Nuclear Instruments and Methods in Physics Research B, 193(1-4), p.674 - 679, 2002/06
Times Cited Count：5 Percentile：34.51(Instruments & Instrumentation)no abstracts in English
ions with Ba atomsIemura, K.*; Otani, Shunsuke*; Suzuki, H.*; Takeda, Junichi*; Machida, Shuichi*; Tanabe, K.*; Takayanagi, Toshinobu*; Wakiya, K.*; Sekiguchi, M.*; Kanai, Yasuyuki*; et al.
Physical Review A, 64(6), p.062709_1 - 062709_14, 2001/12
Times Cited Count：6 Percentile：35.7(Optics)We measured ejected electron spectra caused by autoionization of doubly excited states in He atoms; the excited He was made by double electron capture of low-energy He ions colliding with Ba atoms. Measurements were performed by means of zero degree electron spectroscopy at projectile energies from 40 to 20 keV. Electron spectra due to autoionization from the states He(2lnl) to He+(1s) for n
2, and those from He(3lnl) to He
(2s or 2p) for n3, were observed. Line peaks in the spectra were identified by comparing observed electron spectra with those of several theoretical calculations. It was found that doubly excited states of relatively high angular momenta such as the D and F terms were conspicuously created in a quite different manner from the cases of the production of doubly excited states by the use of photon, electron, or ion impacts on neutral He atoms. Rydberg states with large n values were observed with high population in both the He(2lnl) and He(3lnl) series.
produced by low energy Ne
+He, Ne and Ar collisionsKitazawa, Shinichi; Ida, H.*; Matsui, Y.*; Takayanagi, Toshinobu*; Wakiya, K.*; Iemura, K.*; Otani, Shunsuke*; Suzuki, H.*; Kanai, Yasuyuki*; Safronova, U. I.*
Journal of Physics B; Atomic, Molecular and Optical Physics, 34(16), p.3205 - 3220, 2001/08
Times Cited Count：5 Percentile：31.37(Optics)no abstracts in English
ions with aklaline-earth atomsIemura, K.*; Suzuki, H.*; Otani, Shunsuke*; Takeda, Junichi*; Takayanagi, Toshinobu*; Wakiya, K.*; Sekiguchi, M.*; Kanai, Yasuyuki*; Kitazawa, Shinichi; Tong, X. M.*; et al.
Atomic Collision Research in Japan, No.25, p.42 - 43, 1999/11
no abstracts in English
Kitazawa, Shinichi; Sataka, Masao; Tawara, Hiroyuki*; Imai, Makoto*; Shibata, Hiromi*; Komaki, Kenichiro*; Azuma, Toshiyuki*; Kawatsura, Kiyoshi*; Kanai, Yasuyuki*
Atomic Collision Research in Japan, No.25, p.65 - 67, 1999/00
no abstracts in English
Kitazawa, Shinichi; *; *; *; Machida, Shuichi*; *; Wakiya, K.*; *; F.Currel*; *; et al.
Atomic Collision Research in Japan, (24), p.70 - 72, 1998/00
no abstracts in English
(1s3l3l') produced by 60keV N
+H,O collisions*; Awaya, Yoko*; F.J.Currell*; Kambara, Tadashi*; Kanai, Yasuyuki*; Kitazawa, Shinichi; *; *; U.I.Safronova*; *; et al.
Journal of Physics B; Atomic, Molecular and Optical Physics, 29, p.1995 - 2006, 1996/00
Times Cited Count：5 Percentile：36.42(Optics)no abstracts in English
Kageyama, H.*; Kawatsura, Kiyoshi*; Takahashi, R.*; Arai, Shigeyoshi*; Kambara, Tadashi*; Oura, Masaki*; Papp, T.*; Kanai, Yasuyuki*; Awaya, Yoko*; Takeshita, Hidefumi; et al.
Nuclear Instruments and Methods in Physics Research B, 107(1-4), p.47 - 50, 1996/00
Times Cited Count：2 Percentile：31.89(Instruments & Instrumentation)no abstracts in English
, Si and Ni ions in collisions with a He targetSataka, Masao; Imai, Makoto; *; Komaki, Kenichiro*; Kawatsura, Kiyoshi*; Kanai, Yasuyuki*; *
Nuclear Instruments and Methods in Physics Research B, 79, p.81 - 84, 1993/00
Times Cited Count：6 Percentile：57.48(Instruments & Instrumentation)no abstracts in English
2p9l states of S
ions excited through carbon foilsImai, Makoto; Sataka, Masao; Naramoto, Hiroshi; *; Komaki, Kenichiro*; Kawatsura, Kiyoshi*; Kanai, Yasuyuki*
Nuclear Instruments and Methods in Physics Research B, 67, p.142 - 145, 1992/00
Times Cited Count：12 Percentile：73.29(Instruments & Instrumentation)no abstracts in English
and HeP.Hvelplund*; *; Komaki, Kenichiro*; *; *; *; Kawatsura, Kiyoshi*; Sataka, Masao; Imai, Makoto; Kanai, Yasuyuki*; et al.
Journal of the Physical Society of Japan, 60(11), p.3675 - 3678, 1991/11
Times Cited Count：9 Percentile：62.5(Physics, Multidisciplinary)no abstracts in English
I.Kadar*; H.Altevogt*; R.Koehrbrueck*; V.Montemayor*; A.Mattis*; G.Schiwietz*; B.Skogvall*; K.Sommer*; N.Stolterfoht*; Kawatsura, Kiyoshi*; et al.
Physical Review A, 44(5), p.2900 - 2912, 1991/09
Times Cited Count：5 Percentile：39.03(Optics)no abstracts in English
Kawatsura, Kiyoshi*; Sataka, Masao; Naramoto, Hiroshi; Imai, Makoto; Komaki, Kenichiro*; *; *; Kanai, Yasuyuki*; Kambara, Tadashi*; *; et al.
Nuclear Instruments and Methods in Physics Research B, 53(4), p.421 - 425, 1991/04
Times Cited Count：16 Percentile：83(Instruments & Instrumentation)no abstracts in English
Kawatsura, Kiyoshi*; Sataka, Masao; *; Komaki, Kenichiro*; Kanai, Yasuyuki*; Naramoto, Hiroshi; *; Kambara, Tadashi*; *; Nakai, Yota; et al.
Nuclear Instruments and Methods in Physics Research B, 48, p.103 - 106, 1990/00
Times Cited Count：17 Percentile：82.12(Instruments & Instrumentation)no abstracts in English
*; *; *; Kanai, Yasuyuki*; Kawatsura, Kiyoshi; *; H.Vogt*; *; *
Lecture Notes in Physics, Vol.294, p.185 - 196, 1988/00
no abstracts in English
