Spontaneous magnetic moments in YBa2Cu3O7-delta thin films

Article

关键词: TIME-REVERSAL-SYMMETRY;    D-WAVE SUPERCONDUCTORS;    HIGH-TEMPERATURE SUPERCONDUCTORS;    GREEN PHASE Y2BACUO5;    GRAIN-BOUNDARIES;    ORDER PARAMETERS;    BREAKING;    SURFACE;    COEXISTENCE;    IMPURITIES;   

DOI  :  10.1103/PhysRevB.62.13934

来源: SCIE

【 摘 要 】

We have observed spontaneous magnetic moments with random signs in c-axis-oriented thin films of the high-T-c cuprate superconductor YBa2Cu3O7-delta, imaged with a scanning superconducting quantum interference device microscope. These moments arise when the samples become superconducting, and appear to be associated with nonferromagnetic defects in the films. In contrast with granular high-T-c samples, which also show spontaneous moments with random signs, the present samples shield diamagnetically.

【 授权许可】

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