Inhaltszusammenfassung

The in-plane critical current density jcab of thin epitaxial YBa2(Cu1-xZnx)3O7-? films (x = 0.001 ÷ 0.02) was measured in magnetic fields up to 7 T under variation of the angle between the applied magnetic field and the c-axis of the films (j|| axis of rotation, i.e. j ? B). At high temperatures (i.e. T > 0.5 Tc) the jc() dependences differ significantly from those obtained for undoped films. In order to explain the resulting structures quantitatively, we propose a model based on the addition...The in-plane critical current density jcab of thin epitaxial YBa2(Cu1-xZnx)3O7-? films (x = 0.001 ÷ 0.02) was measured in magnetic fields up to 7 T under variation of the angle between the applied magnetic field and the c-axis of the films (j|| axis of rotation, i.e. j ? B). At high temperatures (i.e. T > 0.5 Tc) the jc() dependences differ significantly from those obtained for undoped films. In order to explain the resulting structures quantitatively, we propose a model based on the additional pinning mechanism arising from pointlike pinning centres due to the Zn dopant atoms. » weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik