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Author Durán, C.; Esquinazi, P.; Fainstein, C.; Núñez Regueiro, M.
Title (up) Anomalies in the internal friction and sound velocity in YBa2Cu3O7-x and EuBa2Cu3O7-x superconductors Type Journal Article
Year 1988 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 65 Issue 9 Pages 957-961
Keywords
Abstract Internal friction Q-1 and Young Modulus sound velocity vE measurements at 1 kHz in YBa2Cu3O7?x and EuBa2Cu3O7?x polycrystalline samples reveal anomalies at the superconducting transition and at not, vert, similar37 K. The anomaly in vE at not, vert, similar90 K is accompanied by an absorption peak and is in agreement with published ultrasonic measurements, suggesting a lattice deformation at the superconducting transition.
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ISSN 0038-1098 ISBN Medium
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Notes Approved no
Call Number BT @ pedrazp @ Serial 569
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Author Trovarelli, O.; Stickar, P.; Sereni, J.G.; Schmerber, G.; Kappler, J.P.
Title (up) Coexistence of magnetic and non magnetic states in Ce14X51 (X = Au, Ag and Cu) Type Journal Article
Year 1994 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 89 Issue 5 Pages 421-424
Keywords
Abstract Magnetic (chi), thermal(C-p), and transport (p) measurements on Ce(l4)X(51) (X = Au, Ag and Cu) are presented. All these compounds show antiferromagnetic type order at low temperatures, with T-N = 0.9 K (Au), 1.1 K (Ag) and 3.2 K (Cu). Within the Gd14Ag51-type structure the Ce atoms sit in different sublattices denoted by I (2 atoms), II (6 atoms) and III (6 atoms), therefore the results can be interpreted in terms of three different behaviors of Ce depending on its local environment. From the entropy involved in the magnetically ordered (MO) phase it can be established that the Ce-II and Ce-III atoms order in Cel4Au51 and Ce14Ag51, while the Ce-I order in Cel4Cu51. There is a large linear contribution to Cp at T > T-N,T-gamma HT = 0.81 (Au), 1.24 (Ag) and 3.1 (Cu) J/mol K-2, which indicates the coexistence of MO and heavy fermions. In the case of Cel4Cu51, the magnetic contribution to Cp from sublattice Ce-I around T-N,T- resembles that of a modulated system and the characteristic temperatures for Ce-II and Ce-III atoms are estimated from p(T) as:T-K=16 K and >120 K respectively.
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ISSN 0038-1098 ISBN Medium
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Notes ISI:A1994MX74400003 Approved no
Call Number BT @ hernan @ Serial 107
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Author Civale, L.; de la Cruz, F.; Luzuriaga, J.
Title (up) Critical temperature and density of states in amorphous Zr70Cu30 Type Journal Article
Year 1983 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 48 Issue 4 Pages 389-391
Keywords ZIRCONIUM COPPER ALLOYS
Abstract By means of thermal heat treatment of amorphous Zr70Cu30 it is shown that the induced decrease in critical temperature is followed by a reduction in the electronic density of states of the same magnitude as that obtained by changing the Cu concentration. This result indicates that the density of states is the fundamental microscopic parameter determining the superconducting behavior.
Address Centro Atomico Bariloche
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN 00381098 (ISSN) ISBN Medium
Area Expedition Conference
Notes Cited By (since 1996): 1; Export Date: 28 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Civale, L.; Centro At Approved no
Call Number BT @ luzuriag @ Serial 503
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Author Guimpel, J.; de la Cruz, F.
Title (up) Electrical resistivity of amorphous Zr70Cu30 and the Kondo like model Type Journal Article
Year 1982 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 44 Issue 7 Pages 1045-1046
Keywords Zr70Cu30; superconductivity; electrical resistivity; ZIRCONIUM COPPER ALLOYS
Abstract Electrical resistivity measurements of amorphous Zr70Cu30 as a function of the concentrations of two level systems show that a Kondo like theory cannot explain the observed temperature dependence.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN 0038-1098 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 540
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Author Shalóm, D. E.; Pastoriza, H.
Title (up) Experimental evidence for anisotropic response of a driven vortex lattice Type Journal Article
Year 2003 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 126 Issue 7 Pages 379-383
Keywords
Abstract We present kinetic inductance measurements in current driven Josephson junction arrays. Measurements performed with circular coils indicate that this technique is very sensitive to the vortex mobility. Results obtained with anisotropic detection coils provide experimental evidence for the anisotropic response of a driven vortex lattice. Anisotropic behavior is obtained when rising the temperature or the mean vortex velocity as indicated by the loss of the superconducting shielding capability, first in the direction of vortex motion and then in the perpendicular direction.
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Notes Approved no
Call Number BT @ hernan @ shalom03 Serial 42
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Author Kaufman, H.L.; de la Cruz, F.
Title (up) Fluctuation induced diamagnetism in aluminum Type Journal Article
Year 1971 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 9 Issue 20 Pages 1729-1732
Keywords
Abstract The magnetic field and temperature dependence of the magnetization of bulk aluminum near the normal-superconductor transition has been measured. Due to the large amount of supercooling in one of the samples it was possible to extend the measurements well below the critical temperature. A comparison of the experimental results with theory is presented.

Résumé

Nous avons mesuré la dépendance en champ magnétique et en température de la magnétisation d'un échantillon massif d'aluminium au voisinage de la transition état normal-état supraconducteur. Grâce au ‘supercooling’ important d'un des échantillon, nous avons pu étendre nos mesures bien au dessous de la température critique. Nous comparons les résultats expérimentaux à la théorie.
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ISSN 0038-1098 ISBN Medium
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Notes Approved no
Call Number BT @ pedrazp @ Serial 803
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Author Esquinazi, P.; de la Cruz, M.E.; Ridner, A.; de la Cruz, F.
Title (up) 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
Keywords
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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ISSN 0038-1098 ISBN Medium
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Notes Approved no
Call Number BT @ pedrazp @ Serial 529
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Author Giriat, G.; Ren, Z.; Pedrazzini, P.; Jaccard, D.
Title (up) High pressure investigation of superconducting signatures in CeCu2Si2: ac-magnetic susceptibility, ac-heat capacity, resistivity and thermopower Type Journal Article
Year 2015 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 209–210 Issue Pages 55-58
Keywords CeCu2Si2; Superconductivity; Magnetic susceptibility; High pressure
Abstract Taking advantage of a novel multiprobe setup we have measured, on a unique sample, the ac-magnetic susceptibility, the resistivity, the ac-specific heat and the thermopower of the superconductor heavy fermion CeCu2Si2 under pressure up to 5.1 GPa. At the superconducting transition temperature Tc, the Meissner signal corresponds to that expected for the sample volume and coincides with the specific heat jump and the resistive transition completion temperatures. Differing from previous observations, here the susceptibility measurements did not reveal any anomaly in the vicinity of the resistive transition onset.
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ISSN 0038-1098 ISBN Medium
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Notes Approved no
Call Number BT @ pedrazp @ Serial 720
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Author Luzuriaga, J.; D'Ovidio, C.; de la Cruz, F.
Title (up) Ideal two dimensional flux pinning induced by annealing in superconducting amorphous Zr75Rh25 Type Journal Article
Year 1986 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 57 Issue 9 Pages 753-756
Keywords ZIRCONIUM COMPOUNDS – Physical Properties; CRITICAL CURRENT; FLUX PINNING; MELT SPINNING; PINNING FORCES; SUPERCONDUCTING MATRIX; SUPERCONDUCTING MATERIALS
Abstract By annealing amorphous Zr75Rh25 prepared by melt spinning an ideal behaviour of the critical current was observed, in which the measured pinning forces are seen to follow the two dimensional Larkin-Orchivnikov theory. In the region where this theory is valid the changes in the pinning forces can be explained by the changes in the superconducting matrix and it can be assumed that the pinning centers do not change with the heat treatment.
Address Centro Atomico Bariloche, Instituto Balseiro, 8400 Bariloche, Argentina
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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: Luzuriaga, J.; Centro Atomico Bariloche; Instituto Balseiro 8400 Bariloche, Argentina Approved no
Call Number BT @ luzuriag @ Serial 501
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Author Fasano, Y.; de Seta, M.; Menghini, M.; Pastoriza, H.; de la Cruz, F.
Title (up) Imaging the structure of the interface between symmetries interconnected by a discontinuous transition Type Journal Article
Year 2003 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 128 Issue 3-4 Pages 51-55
Keywords
Abstract We have been able to observe with single particle resolution the interface between two structural symmetries that cannot be interconnected by a continuous transition. By means of an engineered 2D potential that pins the extremity of vortex strings a square symmetry was imposed at the surface of a 3D vortex solid. Using the Bitter decoration technique and on account of the continuous vortex symmetry, we visualize how the induced structure transforms along the vortex direction before changing into the expected hexagonal structure at a finite distance from the surface.
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Notes Approved no
Call Number BT @ hernan @ fasano03a Serial 18
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