Zobrazeno 1 - 10
of 78
pro vyhledávání: '"N. Sparvieri"'
Publikováno v:
International Journal of Modern Physics B. 13:1107-1110
We present measurements of the microwave resistivity at 48 GHz in YBa 2 Cu 3 O 7-δ film, as a function of the temperature and the magnetic field. The magneto-dissipation from 60 K up to a few kelvins below Tc finds a quantitative description in term
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35f5e5df9fc7069b0ddc6d245cbd0d3c
https://doi.org/10.1142/s021797929900103x
https://doi.org/10.1142/s021797929900103x
Publikováno v:
Journal of Materials Science. 34:6177-6182
The effect of hot pressing conditions (sintering temperature and time) on the superconducting properties of (2223) Bi(Pb)SrCaCuO were investigated by transport and magnetic measurements. The advancement of the densification process leads first to an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67e7cb42eb21394e549f85d860e30c9b
https://doi.org/10.1023/a:1004786324179
https://doi.org/10.1023/a:1004786324179
Publikováno v:
Physical Review B. 58:14581-14587
We discuss the excess conductivity above ${T}_{c}$ due to renormalized order-parameter fluctuations in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ (YBCO) at microwave frequencies. We calcul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e48a92987e22c6b12157c6dd9a258c27
https://doi.org/10.1103/physrevb.58.14581
https://doi.org/10.1103/physrevb.58.14581
Autor:
N. Sparvieri
Publikováno v:
Il Nuovo Cimento D. 20:1239-1247
Interferometric thermal diffusivity measurements and elastic constants obtained by ultrasonic techniques on Y3Fe5_ϰAlϰO12 (with ϰ 4 0, 0.4, 0.8, 1.1) ceramic samples are presented and discussed. The phonon mean free path is given as a function of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd65da3f588079a887db51d3069df0b8
https://doi.org/10.1007/bf03185535
https://doi.org/10.1007/bf03185535
Autor:
B. Camarota, A. Di Trolio, N. Sparvieri, M. Boffa, A. Saggese, Antonio Vecchione, Sandro Pace
Publikováno v:
Il Nuovo Cimento D. 19:1025-1031
Samarium element has been substituted to yttrium in Y123 superconducting melt textured bulk samples in order to make the whole fabrication process much faster. A preliminary comparison between directionally solidified Y1Ba2Cu3O7- and Sm1Ba2Cu3O7-x bu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fa11132335c07e82640e97df9f85ab9
https://doi.org/10.1007/bf03185387
https://doi.org/10.1007/bf03185387
Publikováno v:
Il Nuovo Cimento D. 19:1231-1236
Because of their intrinsic layered structure, high temperature superconductors are suitable systems for studying the strong anisotropy of their superconducting properties. In fact, the response of a sample to an external magnetic fieldH depends gener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91aa655ccee8758bbe4a76504748c635
https://doi.org/10.1007/bf03185414
https://doi.org/10.1007/bf03185414
Autor:
Antonio Vecchione, A. Di Trolio, Sandro Pace, B. Camarota, A. Saggese, N. Sparvieri, M. Boffa
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 7:1797-1800
Rare Earth (Nd,Sm) elements, having relatively large ionic radius, have been substituted for Yttrium in Y123 superconducting melt textured bulk samples. In (Nd,Sm)123 a wider solidification range and higher recrystallization rate than Y123 significan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7990fd13bb2906c26145d61ef5a83b55
https://doi.org/10.1109/77.620931
https://doi.org/10.1109/77.620931
Publikováno v:
Applied Superconductivity. 4:365-373
We have set up an easy and reliable experimental apparatus to perform the surface resistance measurement at 10 GHz in the TE011 mode by the dielectric resonator method. This resonant system is unaffected by the measured sample shape, provided that th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd6da27b68900fcbf8d389b9659d18e0
https://doi.org/10.1016/s0964-1807(97)00019-7
https://doi.org/10.1016/s0964-1807(97)00019-7
Autor:
Anna Tampieri, Stefano Paoloni, R. Li Voti, N. Sparvieri, Concita Sibilia, G. L. Liakhou, F. Ricciardiello, Mario Bertolotti
Publikováno v:
Journal of thermal analysis. 47:67-74
The photothermal deflection method has been used for thermal diffusivity measurements on bulk YBCO and BISCCO highTc superconductors. A cryostat set up is used to perform photothermal measurements from room temperature down to 77 K.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd3346adedbc2fb4faad0efbfd057f94
https://doi.org/10.1007/bf01982686
https://doi.org/10.1007/bf01982686
Autor:
A. Spallone, M. Boutet, Massimiliano Polichetti, D. Di Gioacchino, Paolo Tripodi, F. Celani, N. Sparvieri, P. Cocciolo
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:1525-1528
In this paper the oxygen deficiency of YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) films has been decreased at room temperature by the anode oxidation in an aqueous solution of LiOH (0.3 N). The anode oxidation of the films has been performed by /spl mu/s p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b16df8f24b7d0f7b209403529a42517f
https://doi.org/10.1109/77.402862
https://doi.org/10.1109/77.402862