Magnetically Dependent Adsorption of Oxygen on Superconducting Adsorbent
V International Conference on Materials and Mechanisms of Superconductivity - High Temperature Superconductors
28 Feb - 4 Mar 1997
Physica C: Superconductivity and its Applications
, E-ISSN: 1873-2143
Number: Pt. 3,
Federal Scientific Center “Boreskov Institute of Catalysis” pr. Akademika Lavrentieva 5, Novosibirsk, 630090 Russia
There were investigated the adsorptional properties of the superconducting powder of yttrium ceramics YBa2Cu3O7−δ in external magnetic field in the region of temperatures of superconducting transition. Argon and oxygen were as adsorbates. Oxygen adsorption was found to be abnormal. The specific surface of the superconducting adsorbent for oxygen appeared to depend dramatically on temperature and magnitude of the external magnetic field. These phenomena seem to be connected with the repulsion of paramagnetic oxygen molecules from diamagnetic surface of the adsorbent.