Inhaltszusammenfassung

We report on heavy-ion induced effects on the transport critical current density Jct in expitaxial thin films of Bi-2212. The films were irradiated with different ions at a temperature of 70 K. In-situ measurements showed an increase of Jct with the applied ion dose. We found enhancement factors of up to 150 in magnetic fields below 2 T for irradiation with 197Anu- and 238U-ions. Applying 40Ca- and 197Au-ions to the same sample in two consecutive experiments we could show that the columnar de...We report on heavy-ion induced effects on the transport critical current density Jct in expitaxial thin films of Bi-2212. The films were irradiated with different ions at a temperature of 70 K. In-situ measurements showed an increase of Jct with the applied ion dose. We found enhancement factors of up to 150 in magnetic fields below 2 T for irradiation with 197Anu- and 238U-ions. Applying 40Ca- and 197Au-ions to the same sample in two consecutive experiments we could show that the columnar defects produced by the heavy ions are more effective pinning sites than scattered displacement cascades. » weiterlesen» einklappen

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Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik