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The effect of change in the positron lifetime at the superconducting transition in YBa2Cu3O7−δ and the ortho-para conversion of positronium in voids

✍ Scribed by V.L. Sedov; Mohammad Abdul Hafiz; I.E. Graboy; A.R. Kaul; V.P. Shabatin

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
575 KB
Volume
151
Category
Article
ISSN
0375-9601

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We have determined the superconducting transition in YBazCu30,\_d single crystal by measurements of thermopower. Two transitions were observed.in both the abplane and the c-direction. The high temperature transition may have a close relation to the surface shell of the crystal.