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Author Osquiguil, E.; Frank, V.L.P.; de la Cruz, F.
Title Two dimensional collective flux pinning in melt spun superconducting amorphous Zr70Cu30 Type Journal Article
Year 1985 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume (down) 55 Issue 3 Pages 227-230
Keywords ZIRCONIUM COPPER ALLOYS – Amorphous; CRITICAL CURRENTS; PINNING FORCES; SUPERCONDUCTING MATERIALS
Abstract We have measured the critical currents in melt spun amorphous Zr70Cu30 and their evolution with heat treatment. We found that the pinning forces may be interpreted in terms of the Larkin-Ovchinnikov two dimensional collective pinning theory.
Address Centro Atómico Bariloche – Instituto Balseiro, Argentina
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ISSN 00381098 (ISSN) ISBN Medium
Area Expedition Conference
Notes Cited By (since 1996): 1; Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Osquiguil, E.J.; Centro At Approved no
Call Number BT @ osquigui @ Serial 420
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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 (down) 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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Author Civale, L.; de la Cruz, F.; Luzuriaga, J.
Title Critical temperature and density of states in amorphous Zr70Cu30 Type Journal Article
Year 1983 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume (down) 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
Series Volume Series Issue Edition
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 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 (down) 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 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 (down) 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
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 0038-1098 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 529
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Author Guimpel, J.; de la Cruz, F.
Title 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 (down) 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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Notes Approved no
Call Number BT @ pedrazp @ Serial 540
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Author Huber, J.G.; Bulman, J.B.; Sereni, J.G.
Title Superconductivity under pressure and low temperature specific heat of ThPr alloys Type Journal Article
Year 1982 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume (down) 43 Issue 12 Pages 925-931
Keywords
Abstract Measurements of superconducting transition temperature under pressure and low temperature specific heat are presented for ThPr alloys. At 18.2 kbar the normal- to superconducting-state phase boundary extends beyond 50 at.% Pr. This system is discussed in terms of a non-magnetic singlet ground state for the Pr3+ ions due to crystal field splitting. A splitting scheme which varies with Pr concentration is proposed.
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ISSN 0038-1098 ISBN Medium
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Notes ISI:A1982PG48200012 Approved no
Call Number BT @ hernan @ Serial 134
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Author 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 (down) 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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Notes Approved no
Call Number BT @ pedrazp @ Serial 567
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Author 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 (down) 38 Issue 12 Pages 1253-1255
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Abstract We show that temperature dependent penetration depth measurements can be used to characterize the superconductive behaviour of amorphous metals.
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Notes Approved no
Call Number BT @ pedrazp @ Serial 557
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Author Daudin, B.
Title Thermal conductivity of amorphous La70Cu30 Type Journal Article
Year 1981 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume (down) 37 Issue 2 Pages 149-152
Keywords La70Cu30; superconductivity; amorphous
Abstract We have measured in a temperature range of 0.6 to 6.5 K the thermal conductivity of various samples of amorphous La70Cu30 prepared by ultra rapid quenching. Below the superconducting critical temperature (Tc=3.85K) we found the classical amorphous behaviour and determined the coupling constant n0M2. Above Tc we found that the thermal conductivity was governed by the electron-phonon interaction and we discuss the results obtained.
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 556
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