Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Minoru Takai"'
Autor:
Takaaki Ikemachi, Shuichi Yoshikawa, Shoichi Nakano, Yorinobu Yoshisato, Kazuya Niki, Minoru Takai
Publikováno v:
IEEE Transactions on Applied Superconductivity. 3:2156-2159
The authors have developed a high-impedance Josephson-type microwave detector and a practical microwave video detection system using a small Stirling refrigerator. The detector was fabricated from a newly developed YBCO-BiO composite superconductor p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abd8de935bc61cabec2013faaca5c477
https://doi.org/10.1109/77.233929
https://doi.org/10.1109/77.233929
Publikováno v:
IEEE Transactions on Magnetics. 27:3073-3076
Microbridge-type Josephson junctions made of granular bulk YBCO superconductors were experimentally studied at microwave frequencies. Although the bridge included many grain boundaries, clear Shapiro steps were induced at every hf/2e voltage for micr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7afb232b436b7a02e622cd394d5df855
https://doi.org/10.1109/20.133861
https://doi.org/10.1109/20.133861
Autor:
Minoru Takai, Yorinobu Yoshisato, S. Nakano, Takaaki Ikemachi, Shuichi Yoshikawa, Kazuya Niki
Publikováno v:
AMPC Asia-Pacific Microwave Conference.
We have developed a high impedance, Josephson type detector using a newly developed YBCO-BiO composite superconductor. It was found that the measured responsivity (RMv) and noise equivalemt power (NEP) could be improved by Bi2O3 doping, through enhan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::335202f6c060f45aab547fd5fd84fe38
https://doi.org/10.1109/apmc.1992.671972
https://doi.org/10.1109/apmc.1992.671972
Autor:
Yorinobu Yoshisato, Shoichi Nakano, Kazuya Niki, Minoru Takai, Yoshiaki Nakatani, Takaaki Ikemachi
Publikováno v:
Advances in Superconductivity V ISBN: 9784431683070
The micro-structure of YBCO-BiO composite superconductors for high- impedance microwave detectors has been studied. The results of XRD measurement and EPMA showed that both Ba2YBiO6 and CuO coexisted in the YBa2Cu3O7−δ (abbreviated to YBCO) grain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b708a8cf785fea72ec2557ed86ccf0e3
https://doi.org/10.1007/978-4-431-68305-6_254
https://doi.org/10.1007/978-4-431-68305-6_254
Autor:
Shoichi Nakano, Kazuya Niki, Yoshiaki Nakatani, Yorinobu Yoshisato, Minoru Takai, Shuichi Yoshikawa
Publikováno v:
Advances in Superconductivity IV ISBN: 9784431681977
Practical responsivity and noise equivalent power (NEP) were mesured using a granular-type Josephson microwave detector with YBCO-BiO composite superconductors prepared by Bi2O3 doping into a YBa2Cu3Ox superconductor for the first time. It was found
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c614fc804ffeb95513f14b17c6dc2a52
https://doi.org/10.1007/978-4-431-68195-3_212
https://doi.org/10.1007/978-4-431-68195-3_212
Autor:
Hirano Toshimasa, Shoichi Nakano, Kazuya Niki, Shuichi Yoshikawa, Minoru Takai, Yorinobu Yoshisato
Publikováno v:
Advances in Superconductivity III ISBN: 9784431681434
Successful Josephson mixing of microwaves at 20 GHz was carried out up to 60 K using a microbridge prepared of bulk YBCO superconductors for the first time. Though the bridge included many grain boundaries, Shapiro-steps for a single weak link with m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8eb3f95842410c07594e7ed2a9531963
https://doi.org/10.1007/978-4-431-68141-0_264
https://doi.org/10.1007/978-4-431-68141-0_264
Autor:
Shoichi Nakano, Takaaki Ikemachi, Shuichi Yoshikawa, Minoru Takai, Kohji Yamano, Yorinobu Yoshisato, Kazuya Niki
Publikováno v:
Japanese Journal of Applied Physics. 32:1621
We have developed a new YBCO-BiO composite superconductor for granular-type Josephson microwave detectors. This composite superconductor was prepared by doping YBa2Cu3O x with Bi2O3 and it was found that the normal state resistance increased with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d96b84a7e8b93c88e96d8ed02a40eb28
https://doi.org/10.1143/jjap.32.1621
https://doi.org/10.1143/jjap.32.1621
Autor:
Minoru Takai, Yorinobu Yoshisato, Shoichi Nakano, Shuichi Yoshikawa, Kazuya Niki, Hirano Toshimasa, Akio Takeoka
Publikováno v:
Japanese Journal of Applied Physics. 30:661
A heterodyne mixing experiment of microwaves at about 20 GHz was performed using a microwave detector made from granular-type Y1Ba2Cu3O7-x (YBCO) superconductors. Although the bridge included many boundaries, voltage steps corresponding to the Joseph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::289cafc5c82b9125f0e9ae7c7d5cb3cf
https://doi.org/10.1143/jjap.30.661
https://doi.org/10.1143/jjap.30.661
Autor:
Yukinori Kuwano, Teruhiko Ienaga, Yorinobu Yoshisato, Takaaki Ikemachi, Toshiaki Yokoo, Shoichi Nakano, Minoru Takai
Publikováno v:
Advances in Superconductivity ISBN: 9784431680864
The effect of the grain boundary formed in the sintering process on characteristics of critical current density (Jc) was investigated. The experiments were performed using samples prepared with a coprecipitated Y-Ba-Cu-O compound at a sintering tempe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7d4bdb262061673cc6e0c70838ba88e
https://doi.org/10.1007/978-4-431-68084-0_74
https://doi.org/10.1007/978-4-431-68084-0_74
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