Magnetic fields above the surface of a superconductor with internal magnetism

Article

关键词: TIME-REVERSAL SYMMETRY;    FORCE MICROSCOPY;    VORTEX PHASE;    SR2RUO4;    ORDER;    DESTRUCTION;    STATES;   

DOI  :  10.1103/PhysRevB.76.144507

来源: SCIE

【 摘 要 】

The author presents a method for calculating the magnetic fields near a planar surface of a superconductor with a given intrinsic magnetization in the London limit. He computes solutions for various magnetic domain boundary configurations and derives relations between the spectral densities of the magnetization and the resulting field in the vacuum half space, which are useful if the magnetization can be considered as a statistical quantity and its features are too small to be resolved individually. The results are useful for analyzing and designing magnetic scanning experiments. Application to existing data from such experiments on Sr2RuO4 shows that a domain wall would have been detectable, but the magnetic field of randomly oriented small domains and small defects may have been smaller than the experimental noise level.

【 授权许可】

Free