Inhaltszusammenfassung

Measurements of the depinning field and the critical current density on epitaxially grown c-axis oriented YBa2Cu3O7 films were performed under variation of the angle between the field direction and the c-axis of the film with high angular resolution (??0.04). The critical current densities were measured on a 10 ?m wide and 100 ?m long strip by applying a 1 ?V criterion. The dependence jc() obtained for low temperatures can be well explained by a model published by Tachiki and Takahashi. For ...Measurements of the depinning field and the critical current density on epitaxially grown c-axis oriented YBa2Cu3O7 films were performed under variation of the angle between the field direction and the c-axis of the film with high angular resolution (??0.04). The critical current densities were measured on a 10 ?m wide and 100 ?m long strip by applying a 1 ?V criterion. The dependence jc() obtained for low temperatures can be well explained by a model published by Tachiki and Takahashi. For higher temperatures and higher magnetic fields additional structures appear. The measured angular dependence of the depinning field shows a cusp for =90°. The complete angular dependence Bdp() can be explained by simply taking into account the anisotropy of the upper critical field. » weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik