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VOLUME 51 (1990) | ISSUE 4 | PAGE 228
Destruction of ultrahigh conductivity of oxidized polypropylene by critical current
The passage of a current is observed to sharply reduce the electrical resistance of conducting channels in oxidized polypropylene. The resistance falls to a value lower than can be measured. As the current is increased further, the superconducting state is destroyed at a critical value jc > 108 A/cm2. Lower limits are estimated for the local conductivity, <7> 10м S/cm, and the critical temperature, Tc > 700 K.