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Author (up) de la Cruz, F.; Fink, H.J.; Luzuriaga, J.
Title Temperature dependence of the superconducting giant-vortex state. Theory and Experiment Type Journal Article
Year 1979 Publication Physical Review B Abbreviated Journal Phys. Rev. B
Volume 20 Issue 5 Pages 1947-1959
Keywords
Abstract When a type-I superconductor with a surface nucleation field Hc3(T)>Hc(T) (thermodynamic critical field) is thermally cycled in an axially applied magnetic field H0 between the temperatures T(Hc3) and about T(Hc), experiments show that the magnetization changes reversibly. The latter is diamagnetic near T(Hc3) but can be paramagnetic just above T(Hc). This behavior is explained by assuming that the fluxoid quantum number b is fixed at the transition from the normal to the superconducting state and retained at lower temperatures. The value of b is determined almost entirely by the flux at the transition which is enclosed by a contour located at a distance ξ1.7 from the surface inside the cylinder (ξ is the coherence length). The temperature variation of the order parameter f at the surface of the cylinder, the magnetization m, and the temperature at which m=0 for f≠0 are calculated for R>>ξ. Conservation of the fluxoid quantum number, while T is varied causes the two opposing surface currents to become imbalanced. This is the source of the observed para- and diamagnetism.
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 0163-1829 ISBN Medium
Area Expedition Conference
Notes ISI:A1979HP51300019 Approved no
Call Number BT @ hernan @ Serial 275
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Author (up) Luzuriaga, Javier
Title Propiedades magnéticas de la superconductividad de superficie Type Book Whole
Year 1979 Publication Abbreviated Journal
Volume Issue Pages
Keywords
Abstract
Address Instituto Balseiro
Corporate Author Thesis Ph.D. thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ Serial 348
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Author (up) Sereni, J.G.; Huber, T.E.; Luengo, C.A.
Title Low temperature specific heat of Th-Gd spin glass Type Journal Article
Year 1979 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 29 Issue 9 Pages 671-673
Keywords
Abstract The specific heat measurements of Th---Gd alloys, with Gd concentration ranging from 0.15% to 10.8% and temperatures between 0.4 and 8 K, are reported. The characteristic spin glass specific heat enhancement and its maximum was found linearly proportional to Gd concentration. At low temperatures a T2 dependence of the specific heat was observed and the entropy associated with the magnetic ordering was the 70% of the expected value for the spin S = 7/2.
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 0038-1098 ISBN Medium
Area Expedition Conference
Notes ISI:A1979GP96400009 Approved no
Call Number BT @ hernan @ Serial 139
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Author (up) Sereni, J.G.; Olcese, G.L.; Rizzuto, C.
Title Interconfigurational fluctuations in Ce cubic compounds Type Journal Article
Year 1979 Publication Journal de Physique Colloques Abbreviated Journal
Volume 40 Issue C5 Pages 337-339
Keywords
Abstract The magnetic susceptibility of thirty Ce cubic compounds is analyzed, assuming a temperature dependence of the valence fluctuations. The energy level scheme, obtained by fitting the measured susceptibility is used to calculate other physical properties. A correlation between the Ce ionic radius and the interconfigurational excitation energy has been found.
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 0302-0738 ISBN Medium
Area Expedition Conference
Notes ISI:A1979HK08900117 Approved no
Call Number BT @ hernan @ Serial 138
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