Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Yoshinori Hakuraku"'
Autor:
Akiyoshi Matsumoto, Satoshi Hata, Hitoshi Kitaguchi, Toshiya Doi, T. Izumi, Yoshinori Hakuraku, Yusuke Shimada
Publikováno v:
IEEE Transactions on Applied Superconductivity. 25:1-4
Thin films of Bi-2223 fabricated on SrTiO3(100) substrates by dc sputtering were found to have a transition temperature $(T_\mathrm{c})$ as low as that of bulk-phase Bi-2223. Subsequent annealing of these precursor films in the presence of Bi,Pb-2223
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ec646717f3e95e41a244ca1c470bfe2
https://doi.org/10.1109/tasc.2014.2376193
https://doi.org/10.1109/tasc.2014.2376193
Autor:
Ichi GI, Toshiya DOI, Akihito KATSUME, Takafumi MIYANAGA, Mitsuru INADA, Yoshinori HAKURAKU, Kunihiro SHIMA, Shuichi KUBOTA, Naoji KASHIMA, Shigeo NAGAYA
Publikováno v:
TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan). 47:276-281
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5407a6d5a9ede012584b2d2d2d5c4658
https://doi.org/10.2221/jcsj.47.276
https://doi.org/10.2221/jcsj.47.276
Autor:
Yoshinori Hakuraku, M. Daio, T. Doi, S. Kubota, K. Shima, R. Tomiyasu, Naoji Kashima, M. Tokudome, S. Nagaya
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:3287-3290
The Cu substrates have the advantages of no ferromagnetic contribution to hysteretic AC losses, and low cost compared to Ni substrates. We investigated the Jc-B properties of YBCO films deposited on the cube-textured Cu tapes with intervening buffer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fb4e388255957c0afe6e3d241c57ace
https://doi.org/10.1109/tasc.2009.2018796
https://doi.org/10.1109/tasc.2009.2018796
Autor:
Hideharu Nakashima, Hitoshi Kitaguchi, A. Tanaka, Satoshi Hata, H. Yamashita, Harini Sosiati, Y. Tsukano, Ken Ichi Ikeda, T. Doi, Yoshinori Hakuraku, I. Iwasaki, Kenichiro Takahashi
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:2807-2810
We prepared the multilayered MgB2/Ni thin films with the Ni layer spacings of 32, 23 and 16 nm. The MgB2/Ni multilayer nanostructure was confirmed to be obtained from the scanning transmission electron microscope observation. The clear enhancement of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ba048fb5d852d600e70b7a6466a1910
https://doi.org/10.1109/tasc.2009.2018527
https://doi.org/10.1109/tasc.2009.2018527
Autor:
Toshiya Doi, Manabu Daio, Shuichi Kubota, Yoshinori Hakuraku, Naoji Kashima, Kunihiro Shima, Shigeo Nagaya
Publikováno v:
TEION KOGAKU (Journal of the Cryogenic Society of Japan). 44:488-495
We investigated the effect of the CeO2 buffer layer thickness on YBCO films prepared on CeO2/YSZ/CeO2-buffered Ni-electroplated Cu tapes. The thickness of the CeO2 layer was found to be critical. The thickness of the CeO2 seed layer was varied to be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4888c54958fe1d8ed43d3947cdd5dc3e
https://doi.org/10.2221/jcsj.44.488
https://doi.org/10.2221/jcsj.44.488
Autor:
Kenichiro Takahashi, Zon Mori, Daishi Kawabata, Yoshinori Hakuraku, Hitoshi Kitaguchi, Akiyoshi Matsumoto, Ken-ichi Ogata, T. Doi
Publikováno v:
Physica C: Superconductivity and its Applications. 468:1060-1063
Various applications and fundamental research necessitate the investigation of the effects of in-plane crystal grain boundaries on the transport properties of Bi 2 Sr 2 Ca 1 Cu 2 O 8+ δ (2 2 1 2). In this study, an artificial in-plane crystal grain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ea464cfdd9ced818aab96b4dde3f939
https://doi.org/10.1016/j.physc.2008.05.151
https://doi.org/10.1016/j.physc.2008.05.151
Autor:
Hideharu Nakashima, Satoshi Hata, Yoshinori Hakuraku, Ken Ichi Ikeda, Kenichiro Takahashi, Harini Sosiati, Hitoshi Kitaguchi, Yutaka Tsukano, Toshiya Doi, Hiroki Yamashita
Publikováno v:
TEION KOGAKU (Journal of the Cryogenic Society of Japan). 43:482-490
In this paper, we examine the superconducting properties of MgB2+X thin films prepared with various compositions. MgB2+X thin films were prepared on polished silicon (100) single-crystal substrates using an electron beam evaporation technique without
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71af5640f21983f3ce3cc55753ad93a7
https://doi.org/10.2221/jcsj.43.482
https://doi.org/10.2221/jcsj.43.482
Autor:
Noriyuki Kuwano, Yoshinori Hakuraku, Satoshi Hata, K. Fukuyama, Hitoshi Kitaguchi, Kenichiro Takahashi, T. Doi, K. Masuda, Takeshi Yoshidome
Publikováno v:
Superconductor Science and Technology. 20:1223-1227
We prepared MgB2/Ni and MgB2/B alternately-layered films using electron beam evaporation and coaxial vacuum arc evaporation techniques without any post-annealing. The thickness of each MgB2 layer was designed to be 42, 24 or 15 nm for both MgB2/Ni an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed080fd45b7512717cf7143371f6a781
https://doi.org/10.1088/0953-2048/20/12/023
https://doi.org/10.1088/0953-2048/20/12/023
Autor:
Hitoshi Kitaguchi, K. Fukuyama, S. Hamada, K. Masuda, Yoshinori Hakuraku, Yuki Kobayashi, T. Doi
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:2899-2902
We prepared MgB2 thin films by an electron beam evaporation technique and found that either vacancies and/or B substitutions on Mg sites worked as effective pinning centers in MgB2. We also found that the grain boundaries formed by the columnar grain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cf10072188c0be174ce136c533008c8
https://doi.org/10.1109/tasc.2007.898187
https://doi.org/10.1109/tasc.2007.898187
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:2895-2898
MgB2 thin films were prepared on polycrystalline Cu substrates by using an electron beam evaporation technique. The Jc of MgB2 thin film on Cu plate reached very high Jc of about 1 times 107 A/cm2 at 4.2 K and 1 T. We think that this result may show
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::256cc3ee8431757cf52363fab70df19d
https://doi.org/10.1109/tasc.2007.898199
https://doi.org/10.1109/tasc.2007.898199