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Author Durán, C.; Esquinazi, P.; Luzuriaga, J.; Brandt, E.H. doi  openurl
  Title Bc1 of high-Tc La1.8Sr0.2CuO4 and amorphous Zr70Cu30 superconductors measured by a vibrating reed Type Journal Article
  Year 1987 Publication Physics Letters A Abbreviated Journal Phys. Lett. A  
  Volume 123 Issue 9 Pages 485-488  
  Keywords Zr70Cu30; ZIRCONIUM COPPER ALLOYS – Amorphous  
  Abstract The lower critical field Bc1 of the high-Tc superconductor La1.8Sr0.2CuO4 (Tc=40 K, Bcless-than-or-equals, slant7.7 mT) and of amorphous Zr70Cu30 (Tc=2.6K, Bc1less-than-or-equals, slant3.8 mT) is obtained from the resonance frequency ?/2? of a vibrating reed made of these materials. At applied magnetic fields Ba<Bc1, ?(Ba)=?i(Ba) as predicted for an ideally diamagnetic reed. Above Bc1 we observe a reversible linear law ?2??2inot, vert, similarB2a?B2c1. This allows a simple definition of Bc1 even in ceramic superconductors into which flux starts to penetrate at Bamuch less-thanBc1 due to their granular structure.  
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  ISSN 0375-9601 ISBN Medium  
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  Notes ISI:A1987K407100012 Approved no  
  Call Number BT @ hernan @ Serial 269  
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Author Osquiguil, E.; Frank, V.L.P.; de la Cruz, F. url  doi
openurl 
  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 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  
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  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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