| Records |
| Author |
Arce, R.; Civale, L.; Luzuriaga, J.; Guimpel, J.; de la Cruz, F. |
| Title |
Surface normal regions in superconducting Zr70Cu30 induced by thermal relaxation |
Type |
Journal Article |
| Year |
1983 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Commun. |
| Volume |
48 |
Issue |
12 |
Pages  |
1027-1030 |
| Keywords |
ZIRCONIUM COPPER ALLOYS – Physical Properties; SUPERCONDUCTING MATERIALS |
| Abstract |
Penetration depth measurements show that thermal heat treatment in amorphous Zr70Cu30 induces a normal region 5000 Å thick at the surface of ultrarapid quenched ribbons. Upper critical field measurements indicate that the new induced phase is a normal one while the rest of the sample remains as a homogeneous superconducting phase. |
| Address |
Centro Atómico Bariloche – Instituto Balseiro |
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| ISSN |
00381098 (ISSN) |
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Export Date: 28 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Arce, R.; Centro At |
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BT @ luzuriag @ |
Serial |
502 |
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| Author |
Osquiguil, E.; Civale, L.; Decca, R.; Safar, H.; Martinez, E.; Nieva, G.; de la Cruz, F. |
| Title |
The Granular Behavior of LaSrCuO: Oxygen Concentration Effects on the Electrical Resistivity |
Type |
Book Chapter |
| Year |
1988 |
Publication |
High Temperature Superconductors, Mat. Res. Soc. Symposium Proceedings |
Abbreviated Journal |
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| Volume |
99 |
Issue |
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Pages |
985 |
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| Publisher |
Mater. Res. Soc. |
Place of Publication |
Pittsburgh, PA |
Editor |
ed. M.B. Brosdky, R. C. Dynes, K. Kitazawa and H. L. Tutler |
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no |
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BT @ gnieva @ |
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431 |
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| Author |
López, D.; Decca, R.; de la Cruz, F. |
| Title |
Topological pinning and flux flow in ceramic superconductors |
Type |
Journal Article |
| Year |
1991 |
Publication |
Solid State Communications |
Abbreviated Journal |
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| Volume |
79 |
Issue |
11 |
Pages |
959-962 |
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| Abstract |
The transport current dissipation in the high Tc superconducting ceramic La1.85Sr0.15CuO4−δ shows a sin2 Θ voltage dependence where Θ is the angle between the transport current and the magnetic field. This result and the experimental evidence of an angle independent critical current cannot be explained by the conventional description of flux motion in homogeneous type II superconductors. The results are analyzed in the framework of a granular system where pinning is induced by the topological distribution of current flowing through a multiply connected medium. The dissipation in the superconducting state is found to be due to two additive contributions, one induced by the movement of magnetic flux and the other associated to dissipation in the Josephson junction. |
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0038-1098 |
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no |
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BT @ pedrazp @ |
Serial |
808 |
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| Author |
Esquinazi, P.; de la Cruz, M.E.; Ridner, A.; de la Cruz, F. |
| Title |
Heat treatment effects in amorphous metals: Zr70Cu30 and La70Cu30 |
Type |
Journal Article |
| Year |
1982 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Commun. |
| Volume |
44 |
Issue |
6 |
Pages |
941-944 |
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| Abstract |
We measured the electrical resistivity (4–300 K), superconducting critical temperature and thermal conductivity (0.5–7 K) of the amorphous metals Zr70Cu30 and La70Cu30. Heat treatments below crystallization temperature induced changes in these properties. In particular, in the first stage of the annealing of Zr70Cu30 there are systematic changes in the thermal conductivity and the critical temperature, while the electrical resistivity remains constant. We show that there is no simple correlation between the thermal conductivity processes in the low temperature and plateau regions. We also show that the thermal conductivity of as quenched La70Cu30 is typical of amorphous metals, contrary to information previously reported. |
| Address |
Centro Atómico Bariloche – Instituto Balseiro |
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0038-1098 |
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no |
| Call Number |
BT @ pedrazp @ |
Serial |
529 |
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| Author |
Arce, R.; de la Cruz, F.; Guimpel, J. |
| Title |
Superconducting behavior of amorphous Zr70Cu30 |
Type |
Journal Article |
| Year |
1983 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Commun. |
| Volume |
47 |
Issue |
11 |
Pages |
885-887 |
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| Abstract |
Measurement of the Meissner penetration depth, λ(T) were made in amorphous Zr70Cu30 samples. The results indicate that this amorphous alloy behaves as a BCS superconductor with 2Δ(0)+45 degree rulekTc = 3.8, where Δ(0) is the superconducting energy gap at T=0 and Tc the critical temperature. It is also concluded that the low energy excitation, TLS, characteristics of amorphous material does not contribute to Tc. |
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Centro Atómico Bariloche – Instituto Balseiro |
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0038-1098 |
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BT @ pedrazp @ |
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532 |
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| Author |
Tutzauer, H.; Esquinazi, P.; de la Cruz, M.E.; de la Cruz, F. |
| Title |
Production of ribbon quenched samples using an arc furnace |
Type |
Journal Article |
| Year |
1980 |
Publication |
Review of Scientific Instruments |
Abbreviated Journal |
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| Volume |
51 |
Issue |
6 |
Pages |
855-856 |
| Keywords |
FABRICATION; QUENCHING; ELECTRIC ARCS; FURNACES; METALS; ROTATION; CYLINDERS; DATA; LANTHANUM ALLOYS; COPPER ALLOYS; GOLD ALLOYS |
| Abstract |
We describe a new device to produce ribbons of disordered metals by ultrarapid quenching combining an arc furnace with a rotating cylinder. The characterization of samples of disordered La70 Cu30 and La76Au24 prepared using this method shows good agreement with those obtained by other authors for the same alloys. |
| Address |
Centro Atómico Bariloche – Instituto Balseiro |
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| Publisher |
AIP |
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BT @ pedrazp @ tutzauer:855 |
Serial |
534 |
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| Author |
Ridner, A.; Martínez, E. N.; de la Cruz, F. |
| Title |
Surface-Temperature Determination in the Kapitza Problem |
Type |
Journal Article |
| Year |
1975 |
Publication |
Physical Review Letters |
Abbreviated Journal |
Phys. Rev. Lett. |
| Volume |
35 |
Issue |
13 |
Pages |
855-858 |
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| Abstract |
It is shown that surface superconductivity can be used as a localized thermometer. Its application to the study of the thermal boundary resistance at a Pb-4He interface provides the first experimental evidence for the existence of a rapid temperature variation within microscopic distances from the surface. |
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American Physical Society |
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BT @ pedrazp @ 10.1103/PhysRevLett.35.855 |
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553 |
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| Author |
Bridoux, G.; Pedrazzini, P.; de la Cruz, F.; Nieva, G. |
| Title |
Angular field dependence of the Nernst effect in Bi2Sr2CaCu2O8+delta |
Type |
Journal Article |
| Year |
2007 |
Publication |
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS |
Abbreviated Journal |
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| Volume |
460 |
Issue |
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Pages |
841-842 |
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| Abstract |
The anomalous Nernst effect in hole-doped cuprates has been interpreted in terms of the existence of a superconducting order parameter well above the transition temperature, T-c(H). In order to improve the understanding of this problem, we have measured the angular field dependence of the Nernst signal in Bi2Sr2CaCu2O8+delta single crystals. The experiment was done tilting the magnetic field with respect to the direction of the temperature gradient, above and below T,(H), with applied fields up to 16 T. We have found that all the curves are scaled on one curve against the reduced field Hcos theta at a fixed temperature. (c) 2007 Elsevier B.V. All rights reserved. |
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0921-4534 |
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ISI:000249870600060 |
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BT @ hernan @ |
Serial |
198 |
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| Author |
de la Cruz, F.; López, D.; Nieva, G. |
| Title |
Thermally induced change in the vortex dimensionality of YBa2Cu3O7 single crystals |
Type |
Journal Article |
| Year |
1994 |
Publication |
Philosophical Magazine Part B |
Abbreviated Journal |
Philos. Mag. B |
| Volume |
70 |
Issue |
3 |
Pages |
773 - 786 |
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| Abstract |
Transport measurements in YBa2Cu3O7 single crystals using a modification of the d.c. flux transformer configuration are reported. We show that, for applied magnetic fields in the crystallographic c direction, the vortex correlation length in this direction is reduced to values smaller than the thickness of the sample. The reduction can be induced either by thermal disorder (linear response) or by flux cutting after the vortices reach a critical velocity (nonlinear response). The results show that, in the transition from a vortex-glass state to a vortex-liquid state, the vortices are effectively three dimensional in character. A two-dimensional regime is induced at higher temperatures well inside the reversibility region. |
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no |
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BT @ gnieva @ |
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456 |
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| Author |
de la Cruz, F.; Maloney, M.D.; Cardona, M. |
| Title |
Variation of the Ratio Hc3/Hc2 in the Immediate Vicinity of ${T}_{c}$ |
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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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