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Author (up) 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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Corporate Author Thesis
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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 (up) Arce, Roberto D.
Title Estudio del desorden mediante la longitud de penetración superconductora Type Book Whole
Year 1982 Publication Abbreviated Journal
Volume Issue Pages
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Abstract
Address Instituto Balseiro
Corporate Author Thesis Ph.D. thesis
Publisher Place of Publication Editor
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ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ Serial 342
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Author (up) 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
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
Series Volume Series Issue Edition
ISSN 0038-1098 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 529
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Author (up) 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 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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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 540
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Author (up) 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 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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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 ISI:A1982PG48200012 Approved no
Call Number BT @ hernan @ Serial 134
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Author (up) Sereni, J.G.
Title The effect of the electronic and structural environment on the valence of cerium Type Journal Article
Year 1982 Publication Journal of the Less Common Metals Abbreviated Journal J. Less Common Metals
Volume 86 Issue 2 Pages 287-298
Keywords
Abstract By means of a semiempirical analysis the electrostatic energy Eψ of a charge immersed in the screened Coulomb potential of the total charge distribution of the metal was selected as the most appropriate parameter for correlating different cerium environments. The choice was made by determining the smallest dispersion in plots of various physicochemical parameters versus the rate of depression α of the superconducting transition temperature Tc of thorium-based alloys containing cerium impurities. The magnetic moment of cerium, which depends on the environment, was found to have the greatest effect on the depression of Tc. Eψ was found to be proportional to .

The analysis was extended to some ABj compounds (A ≡ elements of groups II–V including cerium and thorium; Bj ≡ N, Sn3, Tl3, Rh3, Co2, Ir2, B6 and Be13). An empirical relationship between Eψ and the volume contraction due to the formation of the compound was found. The cerium valence for any CeBj compound is deduced from the Eψ(Ce) value compatible with the curve of versusEψ(A), taking into account the fact that the valence and atomic radius of cerium are related.
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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 0022-5088 ISBN Medium
Area Expedition Conference
Notes ISI:A1982PL63800015 Approved no
Call Number BT @ hernan @ Serial 133
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Author (up) SERENI, J.G.
Title THE CERIUM METALLIC RADIUS IN AB2 (C15) LAVES COMPOUNDS (A=CE) Type Journal Article
Year 1982 Publication JOURNAL OF THE LESS-COMMON METALS Abbreviated Journal
Volume 84 Issue 1 Pages 1-10
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Abstract
Address
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 0022-5088 ISBN Medium
Area Expedition Conference
Notes ISI:A1982NV33200001 Approved no
Call Number BT @ hernan @ Serial 135
Permanent link to this record