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Magnetism, Specific Heat, and Surface Topography of Oxide Superconductors

  • H. Jenny (a1), H. Bretscher (a1), T. Frey (a1), D. Anselmetti (a1), H. Heinzelmann (a1), R. Wiesendanger (a1), G. Leemann (a1), B. Walz (a1), D. Säckinger (a1) and H.-J. Güntherodt (a1)...


Samples of the composition MBa2Cu3O7−x with M = Y, Eu, Er, and Gd have been prepared by the standard solid state reaction method. The magnetic susceptibility has been investigated above room temperature up to 187O K in vacuum. Specific heat measurements have been performed with a differential scanning calorimeter (DSC) working at low temperatures in a differential mode using superconducting and non-superconducting samples. The surface topography of the high-Tc superconductors has been investigated at room temperature by scanning tunneling microscopy (STM).



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