Zobrazeno 1 - 10
of 334
pro vyhledávání: '"Kunisuke Asayama"'
Autor:
Kunisuke Asayama, Jun-ichi Shimoyama, K. Ishida, Kazuo Kadowaki, Y. Nakayama, Takashi Mochiku, T. Mito, Y. Tokunaga, Yasuo Kitaoka, K. Kishio, K. Yoshida
Publikováno v:
Journal of Physics and Chemistry of Solids. 62:167-170
We report temperature dependence of the Gaussian component of spin-echo decay rate (1/T2G) in under, optimally and overdoped single crystals Bi2Sr2CaCu2O8+δ (Bi2212) with the superconducting (SC) transition temperatures T c =79, 86, and 77.3 K, resp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae985b600e41d8cb367401cb9391f245
https://doi.org/10.1016/s0022-3697(00)00121-9
https://doi.org/10.1016/s0022-3697(00)00121-9
Autor:
Kunisuke Asayama, Yoshio Kitaoka, Kenji Ishida, Guo-Qing Zheng, Takashi Ohno, Y. Tokunaga, Hidekazu Mukuda
Publikováno v:
Applied Magnetic Resonance. 19:305-319
This paper introduces nuclear magnetic resonance works in the strongly correlated super-conductors: heavy-Fermion, high-T C superconductors and Sr2RuO4. The analyses strongly support the spin-fluctuation-mediated superconductivity model in a high-T C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb0d003c4f55df5411d2b3d71d15342b
https://doi.org/10.1007/bf03162372
https://doi.org/10.1007/bf03162372
Autor:
Takashi Ohno, Kunisuke Asayama
Publikováno v:
Applied Magnetic Resonance. 19:297-304
A scaling relationship has been observed between the63Cu(2) spin-lattice relaxation rates 1/T 1,(18) and 1/T 1(16) observed in18O- and16O-exchanged YBa2Cu4O8 and the normalized temperatureT/T c(18 or 16). This relation implies thatT C is decreased by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::990c64f54835ac0364366b47667a87d2
https://doi.org/10.1007/bf03162371
https://doi.org/10.1007/bf03162371
Publikováno v:
Physical Review B. 60:12279-12285
By means of Ru NMR, magnetic properties in three-dimensional (3D) perovskites ${\mathrm{SrRuO}}_{3}$ (ferromagnet) and ${\mathrm{CaRuO}}_{3}$ (exchange enhanced paramagnet) were investigated and compared with those in the two-dimensional (2D) layered
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbcea167d6159ec2b36eb95537cbdb05
https://doi.org/10.1103/physrevb.60.12279
https://doi.org/10.1103/physrevb.60.12279
Autor:
P. L. Kuhns, Yasuharu Kodama, W. G. Clark, Guo-Qing Zheng, Yasuo Kitaoka, William Moulton, Kunisuke Asayama
Publikováno v:
Physical Review B. 60:R9947-R9950
The responses to the magnetic field (H) of the pseudogap and the superconductivity in the underdoped high-${T}_{c}$ cuprate ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{4}{\mathrm{O}}_{8} {(T}_{c}=74 \mathrm{K})$ are reported up to 23.2 T based on NMR measureme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6058afdff770ce0070f064da16438ed
https://doi.org/10.1103/physrevb.60.r9947
https://doi.org/10.1103/physrevb.60.r9947
Autor:
Takashi Ohno, Kunisuke Asayama
Publikováno v:
Physics Letters A. 258:367-374
A significant scaling of the spin-lattice relaxation rate 1/ T 1 by T / T C was found between 63 Cu(2) relaxation rates for 18 O and 16 O exchanged YBa 2 Cu 4 O 8 . 18 O exchange is considered to induce a decrease in the characteristic energy Γ Q of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a768dd456e54dd724343bb5b20121c45
https://doi.org/10.1016/s0375-9601(99)00383-7
https://doi.org/10.1016/s0375-9601(99)00383-7
Autor:
Yasuo Kitaoka, Frank Steglich, K. Ishida, K. Tabuchi, Yu Kawasaki, K. Kashima, C. Geibel, Kunisuke Asayama
Publikováno v:
Physical Review Letters. 82:5353-5356
We report on the basis of Cu-NQR measurements that the ground state in a series of ${\mathrm{Ce}}_{x}{\mathrm{Cu}}_{2}{\mathrm{Si}}_{2}$ compounds evolves from a magnetically ordered phase at $x\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.975
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::972921bdb5b1a7bd1aca34a68ffc1567
https://doi.org/10.1103/physrevlett.82.5353
https://doi.org/10.1103/physrevlett.82.5353
Publikováno v:
Physical Review B. 59:13973-13976
We report magnetic properties of the antiferromagnet ${\mathrm{YMn}}_{2}$ as functions of pressure and temperature $(T)$ obtained from the ${}^{55}\mathrm{Mn}$ spin-lattice relaxation rate and the Knight shift. An energy-band narrowing due to electro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ea882309029de22845fa496dcd0064b
https://doi.org/10.1103/physrevb.59.13973
https://doi.org/10.1103/physrevb.59.13973
Autor:
Kenji Ishida, Hideki Tou, Kunisuke Asayama, T. Mito, Y. Tokunaga, Yoshio Kitaoka, Hidekazu Mukuda, G.-q. Zheng, Ko-ichi Magishi
Publikováno v:
Physica B: Condensed Matter. :511-516
Recent NMR measurements on high- T c and related material Sr 2 RuO 4 by the Osaka group are reviewed. The following results are presented: (1) Study of YBa 2 Cu 3 O 7 +Ni has revealed that the attractive force is spin in origin. (2) Analysis of T 1 ,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59d69cdb6f25816357b4a6cc9b525afa
https://doi.org/10.1016/s0921-4526(98)01015-1
https://doi.org/10.1016/s0921-4526(98)01015-1
Autor:
Kenji Ishida, Yoshio Kitaoka, Ko-ichi Magishi, Kunisuke Asayama, Guo-Qing Zheng, K. Yoshida, Y. Tokunaga
Publikováno v:
International Journal of Modern Physics B. 12:3207-3215
Recent NMR measurements on high-T c materials by our group are reviewed. Study of YBa2Cu3O7+Ni has revealed that the attractive force is spin in origin. Analysis of T1, the Knight shift K and T2G in Tl2Ba2Ca2CuO10 (Tl2223), HgBa2Ca2Cu3O8 (Hg1223), Hg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84202cc0e0aff8bc837314242ef0dc2b
https://doi.org/10.1142/s0217979298002337
https://doi.org/10.1142/s0217979298002337