| Records |
| Author |
Safar, H.; Rodriguez, E.; de la Cruz, F.; Gammel, P.L.; Schneemeyer, L.F.; Bishop, D.J. |
| Title |
Observation of two-dimensional vortices in Bi2Sr2CaCu2Ox |
Type  |
Journal Article |
| Year |
1992 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
46 |
Issue |
21 |
Pages |
14238-14241 |
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| Abstract |
We report transport measurements in the mixed state of single crystals of Bi2Sr2CaCu2Ox using a modified version of the dc flux transformer geometry pioneered by Giaever in low-Tc materials. We find that over a wide range of the phase diagram the vortices are effectively two dimensional in character. Our results suggest that vortex cutting is an efficient process and that it is unlikely that the vortices are strongly entangled in this region of the phase diagram. |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevB.46.14238 |
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801 |
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| Author |
Civale, L.; Safar, H.; de la Cruz, F. |
| Title |
Percolation and glass behavior in ceramic superconductors: oxygen effects |
Type |
Journal Article |
| Year |
1989 |
Publication |
Modern Physics Letters B |
Abbreviated Journal |
Mod. Phys. Lett. B |
| Volume |
3 |
Issue |
2 |
Pages |
173-181 |
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| Abstract |
It is shown that small variations of oxygen content in La1.8Sr0.2CuO4−δ can be used to control the reversible and irreversible magnetization temperature dependence of the superconducting state. A grain bond model is appropriate to describe the superconducting response of the ceramics. The study of the temperature dependence of the magnetization and the resistive transition temperature, in a slightly deoxygenated sample, show that the reversible superconducting state is strongly correlated to superconducting percolation. Deoxygenation has been shown to be an excellent technique to study the time evolution of metastable states induced by currents in the bonds and or in the grains. It is shown that superconducting grains are not correlated to ceramic grains. |
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BT @ pedrazp @ |
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802 |
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| Author |
Maloney, M.D.; de la Cruz, F.; Cardona, M. |
| Title |
Superconducting Parameters and Size Effects of Aluminum Films and Foils |
Type |
Journal Article |
| Year |
1972 |
Publication |
Physical Review B |
Abbreviated Journal |
Prb |
| Volume |
5 |
Issue |
9 |
Pages |
3558-3572 |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevB.5.3558 |
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804 |
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de la Cruz, F.; Maloney, M.D.; Cardona, M. |
| Title |
Variation of the Ratio Hc3/Hc2 in the Immediate Vicinity of ${T}_{c}$ |
Type |
Journal Article |
| Year |
1969 |
Publication |
Physical Review |
Abbreviated Journal |
Pr |
| Volume |
187 |
Issue |
2 |
Pages |
766-767 |
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American Physical Society |
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BT @ pedrazp @ |
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805 |
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de la Cruz, F.; Maloney, M.D.; Cardona, M. |
| Title |
Superconductive Supercooling and Superheating of Small Cadmium Spheres: Size Effects |
Type |
Journal Article |
| Year |
1971 |
Publication |
Physical Review B |
Abbreviated Journal |
Prb |
| Volume |
3 |
Issue |
11 |
Pages |
3802-3811 |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevB.3.3802 |
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806 |
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Maloney, M.D.; de la Cruz, F.; Cardona, M. |
| Title |
Anomalous Behavior of Hc3/Hc2 near Tc for Sn-In and In-Bi Alloy Systems |
Type |
Journal Article |
| Year |
1970 |
Publication |
Physical Review B |
Abbreviated Journal |
Prb |
| Volume |
2 |
Issue |
7 |
Pages |
2512-2519 |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevB.2.2512 |
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807 |
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| Author |
de la Cruz, F.; Maloney, M.D.; Cardona, M. |
| Title |
Supercooling and superheating in Al and Zn |
Type |
Journal Article |
| Year |
1971 |
Publication |
Physica |
Abbreviated Journal |
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| Volume |
55 |
Issue |
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Pages |
749-759 |
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We have studied the supercooling and superheating of Al and Zn in the temperature range between 0.5 and 1.2 K. The samples, collections of dispersed and isolated small spheres, were prepared by spraying of the molten metal into liquid nitrogen. The supercooling and superheating fields obtained are, by all indications, close to the theoretical limit. From the supercooling fields observed we determined the Ginzburg-Landau parameter κ(Tc) = 0.015, for both Al and Zn. The superheating field exhibits a strong temperature dependence near Tc, which reflects the extremely non-local electrodynamics of the materials. The results are discussed in the light of recent theoretical work. |
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0031-8914 |
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no |
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BT @ pedrazp @ |
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809 |
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| Author |
de la Cruz, F.; de la Cruz, M.E.; Cotignola, J.M. |
| Title |
Efecto magnetomorfico longitudinal en laminas de In |
Type |
Report |
| Year |
1968 |
Publication |
Informe Tecnico CNEA |
Abbreviated Journal |
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Issue |
217 |
Pages |
1-16 |
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Buenos Aires |
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0325-1403 |
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no |
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BT @ pedrazp @ |
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545 |
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