Magnetic fields above the surface of a superconductor with internal magnetism

Abstract

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 Sr${}_2$RuO${}_4$ show 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.

8 pages, 2 figures. Journal version. Added one figure, some discussion. A few typos corrected

References in corpus (1)

• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State

Cited by in corpus (5)

• Search for broken time-reversal symmetry near the surface of YBCO films using Beta-NMR
• Local observation of linear-$T$ superfluid density and anomalous vortex dynamics in URu${}_2$Si${}_2$
• A Review of Electronic Transport in Superconducting Sr${}_2$RuO${}_4$ Junctions
• Magnetic edge fields in UTe${}_2$ near zero background fields
• Magnetic Field Distribution Due to Domain Walls in Unconventional Superconductors