| Records |
| Author |
Guimpel, J.; de la Cruz, F.; Murduck, J.; Schuller, I.K. |
| Title |
Penetration depth of a superconducting superlattice |
Type |
Journal Article |
| Year |
1987 |
Publication  |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
35 |
Issue |
7 |
Pages |
3655-3656 |
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| Abstract |
We have measured the magnetic-flux expulsion of a superconducting superlattice and related it to the Meissner penetration depth. The temperature dependence of the penetration depth is in quantitative agreement with theoretical expectation based on mean-field theory. The zero-temperature penetration depth is found in excellent, quantitative agreement without adjustable parameters with theoretical predictions for dirty superconductors. |
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American Physical Society |
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Rapid Communications |
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| Call Number |
BT @ pedrazp @ 10.1103/PhysRevB.35.3655 |
Serial |
538 |
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| Author |
Guimpel, J.; Civale, L.; de la Cruz, F.; Murduck, J.M.; Schuller, I.K. |
| Title |
Dimensional phase transition in superconductors with short coherence length |
Type |
Journal Article |
| Year |
1988 |
Publication |
Physical Review B |
Abbreviated Journal |
PRB |
| Volume |
38 |
Issue |
4 |
Pages |
2342-2344 |
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| Abstract |
We found a novel dimensional transition in the vortex lattice of a finite-sized superconductor. The low-field dependence (with field applied parallel to the film plane) of the magnetization exhibits two maxima, which signal the transition from one to two dimensions. In one dimension the vortices line up along the film, and with increasing field their arrangement changes into a two-dimensional array due to the competition between vortex-surface and vortex-vortex repulsion. Agreement is found with no adjustable parameter calculations using a priori known surface-barrier and vortex-repulsion effects. |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevB.38.2342 |
Serial |
539 |
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| Author |
Duran, C.; Yazyi, J.; de la Cruz, F.; Bishop, D.J.; Mitzi, D.B.; Kapitulnik, A. |
| Title |
Flux-lattice melting, anisotropy, and the role of interlayer coupling in Bi-Sr-Ca-Cu-O single crystals |
Type |
Journal Article |
| Year |
1991 |
Publication |
Physical Review B |
Abbreviated Journal |
PRB |
| Volume |
44 |
Issue |
14 |
Pages |
7737-7740 |
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| Abstract |
We have used the high-Q mechanical-oscillator technique to probe the vortex-lattice structure in high-quality Bi-Sr-Ca-Cu-O single crystals over a wide range of magnetic fields (200 Oe to 40 kOe), and relative orientations θ between the magnetic field and the crystalline c^ axis. In addition to the large softening and dissipation peak previously observed and interpreted as due to flux-lattice melting, another distinctly different peak at higher temperatures is seen. The temperatures where the dissipation peaks take place are solely defined by the parallel component of the field cosθ, while the restoring force on the oscillator is due to both field components. We suggest that the two peaks are due to the softening of interplanar coupling at the low-temperature peak, and melting or depinning of the two-dimensional pancake vortices at the higher-temperature peak. |
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American Physical Society |
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Rapid Communication |
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BT @ pedrazp @ 10.1103/PhysRevB.44.7737 |
Serial |
543 |
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| Author |
Esquinazi, P.; de la Cruz, F. |
| Title |
Phonon thermal conductivity limited by electron scattering in amorphous Zr70Cu30 |
Type |
Journal Article |
| Year |
1983 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
27 |
Issue |
5 |
Pages |
3069-3072 |
| Keywords |
Zr70Cu30; superconductivity; amorphous |
| Abstract |
The low-temperature thermal conductivity of amorphous Zr70Cu30 is investigated. The lattice thermal conductivity as limited by electrons in the superconducting state has been obtained at temperatures close to Tc. This has allowed for the first time the verification of the temperature dependence of the phonon conductivity as predicted by Bardeen, Rickayzen, and Tewordt. The analysis of the data in the normal and superconducting state shows that Matthiessen's rule can be used in amorphous metals to separate the different scattering processes. |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevB.27.3069 |
Serial |
560 |
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| Author |
Civale, L.; de la Cruz, F. |
| Title |
Anomalous behavior of superconducting samples with a fixed number of vortices |
Type |
Journal Article |
| Year |
1987 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
36 |
Issue |
7 |
Pages |
3560-3564 |
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We report an anomalous reversible temperature dependence of the magnetization of amorphous type-II superconductors. The experimental results were obtained studying the vortex pinning in samples with very low vortex concentration. The anomaly is shown to be a consequence of the lack of flux quantization in finite samples. |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevB.36.3560 |
Serial |
566 |
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Safar, H.; Durán, C.; Guimpel, J.; Civale, L.; Luzuriaga, J.; Rodriguez, E.; de la Cruz, F.; Fainstein, C.; Schneemeyer, L.F.; Waszczak, J.V. |
| Title |
Logarithmic-to-nonlogarithmic flux-creep transition and magnetic-flux hardening in Bi-Sr-Ca-Cu-O superconducting ceramics |
Type |
Journal Article |
| Year |
1989 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
40 |
Issue |
10 |
Pages |
7380 |
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| Abstract |
A sharp temperature- and field-dependent transition from a logarithmic to a nonlogarithmic flux-creep behavior has been found in Bi-Sr-Ca-Cu-O superconductors. The transition is not followed by any noticeable change in the magnetization. However, vibrating-reed measurements show that it coincides with a strong hardening of the magnetic structure. The transition occurs at fields and temperatures well below the reversibility line. The possible relation to the recently proposed flux lattice melting is discussed. |
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American Physical Society |
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no |
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BT @ jguimpel @ 10.1103/PhysRevB.40.7380 |
Serial |
627 |
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| 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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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 |
Serial |
801 |
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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 |
Serial |
804 |
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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 |
Serial |
806 |
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| Author |
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 |
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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 |
Serial |
807 |
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