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Author (down) Bridoux, G.; Nieva, G.; de la Cruz, F.
Title Phase-coherence effects in vortex transport entropy Type Journal Article
Year 2008 Publication PHYSICAL REVIEW LETTERS Abbreviated Journal
Volume 101 Issue 11 Pages 117002
Keywords
Abstract Nernst and electrical resistivity measurements in superconducting YBa2Cu3O7-delta and Bi2Sr2CaCu2O8+delta with and without columnar defects show a distinctive thermodynamics of the respective liquid vortex matter. At a field-dependent high temperature region in the H-T phase diagram, the Nernst signal is independent of structural defects in both materials. At lower temperatures, in YBa2Cu3O7-delta, defects contribute only to the vortex mobility, and the transport entropy is that of a system of vortex lines. The transition to lower temperatures in Bi2Sr2CaCu2O8+delta has a different origin; the maximum in the Nernst signal when decreasing temperature is not associated with transport properties but with the entropy behavior of pancake vortices in the presence of structural defects.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0031-9007 ISBN Medium
Area Expedition Conference
Notes ISI:000259188700052 Approved no
Call Number BT @ hernan @ Serial 195
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Author (down) Bressan, O.J.; Ridner, A.E.; de la Cruz, F.
Title Low angle electron scattering in thermal resistivity Type Journal Article
Year 1975 Publication Journal of Physics F: Metal Physics Abbreviated Journal J. Phys. F: Met. Phys.
Volume 5 Issue Pages 1902-1909
Keywords
Abstract Electrical ( rho ) and thermal (W) resistivity measurements in very dilute In alloys between 1K and 4K show a temperature dependence expressed by rho = rho 0+ beta T5 and WT=(WT)0+AT3+BT5. The BT5 term in the thermal resistivity is due to a contribution from a 'diffusion-like process' of electrons over the Fermi surface, as is the one that describes the temperature dependence of the electrical resistivity. This claim is supported by the experimental fact that the Lorenz number defined as L= beta /B coincides with the value given by L= rho 0/(WT)0 which in turn agrees with the free electron value within 15%.
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Notes Approved no
Call Number BT @ pedrazp @ Serial 550
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Author (down) Bressan, O.J.; Ridner, A.E.; de la Cruz, F.
Title T^5 law and Matthiessen's rule Type Journal Article
Year 1975 Publication Journal of Physics F: Metal Physics Abbreviated Journal J. Phys. F: Met. Phys.
Volume 5 Issue 3 Pages 481
Keywords
Abstract Precise electrical resistivity measurements on very dilute non magnetic indium alloys show no doubt in a T 5 dependence on temperature between 1-4K and strong deviations from Matthiessen rule. Measurements of thermal resistivity show that the extrapolation method to obtain the data to H=0 is correct. Comparison of the results with recent theories is discussed.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0305-4608 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 547
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Author (down) 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
Keywords
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.
Address Centro Atómico Bariloche – Instituto Balseiro
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0038-1098 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 532
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Author (down) Arce, R.; de la Cruz, F.; Fink, H.J.
Title Model relating superconductive penetration depth and metallurgical phase separation in amorphous La70Cu30 Type Journal Article
Year 1982 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 42 Issue 8 Pages 575-577
Keywords
Abstract A model is proposed to account for the large increase in the measured penetration depth of superconducting, amorphous La70Cu30 when the specimens are annealed sufficiently long near, but below, the crystallization temperature. It is suggested that a metallurgical phase separation occurs with domain dimensions in the submicrometer range. Penetration depth measurements as a function of temperature in a weak magnetic field are a useful tool to detect changes in phase separation in high-K materials.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0038-1098 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 567
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Author (down) Arce, R.; de la Cruz, F.; Esquinazi, P.
Title Superconducting penetration depth in amorphous metals Type Journal Article
Year 1981 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 38 Issue 12 Pages 1253-1255
Keywords
Abstract We show that temperature dependent penetration depth measurements can be used to characterize the superconductive behaviour of amorphous metals.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0038-1098 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 557
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Author (down) Arce, R.; de la Cruz, F.; Esquinazi, P.
Title Superconducting penetration depth in amorphous La70Cu30 Type Journal Article
Year 1981 Publication Physica B+C Abbreviated Journal
Volume 108B Issue Pages 1253-1254
Keywords
Abstract It is shown that weak field penetration depth measurements can be used to determine the change in the normal and superconducting behaviour of amorphous samples, when heat-treated below the crystallization temperature. The results are used to discuss the validity of BCS-Gorkov relations, when applied to these materials.
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Notes Proceedings of LT-16 Approved no
Call Number BT @ pedrazp @ Serial 558
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Author (down) 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
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 00381098 (ISSN) ISBN Medium
Area Expedition Conference
Notes Export Date: 28 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Arce, R.; Centro At Approved no
Call Number BT @ luzuriag @ Serial 502
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