| Records |
| Author |
Ferrari, H.; Valenzuela, S.O.; Bekeris, V.; Guimpel, J.; de la Cruz, F. |
| Title |
Short-time magnetization in superconducting thin films |
Type |
Journal Article |
| Year |
1998 |
Publication |
REVISTA MEXICANA DE FISICA |
Abbreviated Journal |
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| Volume |
44 |
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193-195 |
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| Abstract |
We have investigated the magnetization in thin (Y;Gd)Ba2Cu3O7-delta superconducting films in the 100 μs time scale. Magnetic moment was measured with a non-conventional technique that combines the use of a pulsed magnetic field and a synchronized pulsed laser. Both virgin and magnetically cycled samples were examined and results are described within Bean's critical state model. |
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0035-001X |
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ISI:000077675900051 |
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BT @ hernan @ |
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182 |
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Correa, V.F.; Herbsommer, J.A.; Kaul, E.E.; de la Cruz, F.; Nieva, G. |
| Title |
Onset of the 0-dimensional vortex pinning behavior in the optimally doped and overdoped Bi2Sr2CaCu2O8+delta system |
Type |
Journal Article |
| Year |
2000 |
Publication |
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS |
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| Volume |
341 |
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Pages |
1285-1286 |
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We report results of transverse AC magnetic permeability in the linear regime and DC magnetization loops for optimally doped and oxygen overdoped samples of Bi2Sr2CaCu2O8+delta The data cover the low temperature (T < 25K) and low held (H-a < 1000 Oe) region of the magnetic (H-a-T) phase diagram. In optimally doped as well as in overdoped samples a crossover to a O-dimensional pinning regime (Larkin length, L-C(C), shorter than the inter-plane CuO2 distance) is observed at a characteristic temperature Too for all investigated fields. The order-disorder transition, identified by the second peak in magnetization and a non monotonous field dependence of the AC penetration depth, is quenched below T-0D. |
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0921-4534 |
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ISI:000165855700242 |
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BT @ hernan @ |
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221 |
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| Author |
Correa, V.F.; Nieva, G.; Pastoriza, H.; de la Cruz, F. |
| Title |
The true pinning force range in Bi2Sr2CaCu2O8 single crystals at low temperatures |
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Journal Article |
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2004 |
Publication |
Physica C |
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408-410 |
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531-532 |
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We study the effective profile of the pinning potential well in Bi$2$Sr$2$CaCu$_2$O8+δ single crystals using transverse ac magnetic susceptibility. The results show that the harmonic approximation for the potential well (linear regime) is valid up to vortex displacements $r\simeqξ$, where ξ, is the coherence length. In spite of this, it is necessary to induce displacements of the vortex structure much larger than ξ to depin it from its potential. This is shown to take place even in the single vortex limit. |
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BT @ hernan @ correa04 |
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9 |
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| Author |
Ridner, A.; de la Cruz, F.; Martinez, E.N. |
| Title |
Surface superconductivity and Kapitza resistance |
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Conference Article |
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1980 |
Publication |
Phonon Scattering in Condensed Matter |
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199-202 |
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It has been shown1 that surface superconductivity can be used as a localized thermomether to study the temperature close to an interface through which heat is being transported. Knowledge of the temperature profile in the interface region provides evidence which any theory of the heat transport mechanism must take into account. For interfaces between pure lead and HeII we have previously found1 clear differences between extrapolated surface temperatures Tk. and Tm, measured within some 1000Ã… of the interface using a superconducting thermometer. (The reader is refered to ref.1 for details on the experimental method). |
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Plenum Publishing Corp. |
Place of Publication |
New York |
Editor |
Maris, H.J. |
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Phonon Scattering in Condensed Matter |
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III International conference on Phonon Scattering in Condensed Matter |
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no |
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BT @ pedrazp @ |
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555 |
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Bridoux, G.; Pedrazzini, P.; de la Cruz, F.; Nieva, G. |
| Title |
Angular field dependence of the Nernst effect in Bi2Sr2CaCu2O8+delta |
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Journal Article |
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2007 |
Publication |
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS |
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460 |
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841-842 |
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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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no |
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BT @ hernan @ |
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198 |
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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 |
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Book Chapter |
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1988 |
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High Temperature Superconductors, Mat. Res. Soc. Symposium Proceedings |
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99 |
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985 |
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Mater. Res. Soc. |
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Pittsburgh, PA |
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ed. M.B. Brosdky, R. C. Dynes, K. Kitazawa and H. L. Tutler |
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BT @ gnieva @ |
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431 |
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| Author |
López, D.; Nieva, G.; de la Cruz, F. |
| Title |
In- and out-of-plane vortex correlations in YBa2Cu3O7 |
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Journal Article |
| Year |
1994 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
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50 |
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7219 |
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BT @ gnieva @ |
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444 |
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López, D.; Nieva, G.; de la Cruz, F.; Jensen, Henrik Jeldtoft; O’Kane, Dominic |
| Title |
Flux cutting in YBa2Cu3O7-δ single crystals: Experiment and phenomenological model |
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Journal Article |
| Year |
1994 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
50 |
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Pages |
9684 |
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We measured the current-induced loss of vortex correlation in YBa2Cu3O7-δ crystals using the pseudo-dc-flux-transformer geometry. We find that the current density Jcut at which the top and bottom voltage drops differ is a linear function of temperature, is independent of pinning, and depends on the thickness of the sample. This thickness dependence strongly suggests that the electrical current flows at the surface of the sample. The observed behavior with temperature, magnetic field, and thickness is described by a phenomenological model. |
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BT @ gnieva @ |
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445 |
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López, D.; Safar, H.; Gammel, P.L.; Huse, D.A.; Majumdar, S.N.; Schneemeyer, L.F.; Bishop, D.J.; Nieva, G.; de la Cruz, F. |
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Reply to the Comment: Local versus Non-Local Conductivity in YBa2Cu3O7-d |
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Journal Article |
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1995 |
Publication |
Physical Review Letters |
Abbreviated Journal |
Phys. Rev. Lett. |
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75 |
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2447 |
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A Reply to the Comment by Yu. Eltsev and O. Rapp. |
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BT @ gnieva @ |
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446 |
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Lopez, D.; Righi, E. F.; Nieva, G.; de la Cruz, F.; Kwok, W. K.; Fendrich, J. A.; Crabtree, G. W.; Paulius, L. |
| Title |
Amplification of the c-axis vortex correlation by twin-boundary pinning at the vortex liquid-solid phase transition |
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Journal Article |
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1996 |
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PHYSICAL REVIEW B |
Abbreviated Journal |
Phys. Rev. B |
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53 |
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R8895 |
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Transport measurements using the dc flux transformer configuration together with c-axis resistance data in clean and twinned YBa2Cu3O7-δ single crystals show that vortices are localized by the twin-boundary potential. The results support the existence of a divergent tilt modulus [D. R. Nelson and V. M. Vinokur, Phys. Rev. B 48, 13 060 (1993)] in a liquid that freezes into a Bose glass |
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BT @ gnieva @ |
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447 |
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