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Type: Artigo de periódico
Title: Heavy Ions Irradiation Effects On Magnetization Of Tl2ba2cacu2o8 And Tlba2cacu2o7 Single Crystals
Author: Hardy V.
Provost J.
Groult D.
Raveau B.
Tessler L.R.
Frison J.C.
Chaminade J.P.
Bouffard S.
Abstract: Magnetization measurements were performed as a function of magnetic field and time in Tl2Ba2CaCu2O8 and TlBa2CaCu2O7 single crystals to study the effects of high energy Xe ion irradiation. The effective pinning energies at 6 K and 40 K have been evaluated from magnetic relaxation measurements. The activation energies are hardly changed after irradiation. The study of magnetization hysteresis shows that an irradiation fluence of 2 × 1011 ions cm-2 enhanced hysteresis at 6 K in both crystals. But a fluence of 1012 ions cm-2 was detrimental for the 2212 sample which is the most sensitive to heavy ion irradiation damage in the Tl-cuprate family. The magnetic hysteresis at 70 K after irradiation is more drastically increased than at 6 K. This spectacular modification is interpreted by a recovery of the 3D character of the flux line lattice. © 1992.
Rights: fechado
Identifier DOI: 10.1016/0921-5107(92)90128-V
Date Issue: 1992
Appears in Collections:Unicamp - Artigos e Outros Documentos

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