The interplay of ferromagnetism and superconductivity is obviously a topic of great fundamental and practical interest. Specifically, weak ferromagnetism was recently reported to coexist with superconductivity in heavy-fermion specimens.1–3 Even more recently, the discovery that ferromagnetism exists together with superconductivity in high-temperature superconductors (HTSC) of the EuCeRuSrCuO f...

Magnetic flux measurements of a toroidal magnet revealed a concave-shaped field distribution with a single minimum and a null field along the axis of the torus at the point where the field reversed. The non-linear magnetic field of the toroidal magnet perpendicular to the Ag2O-doped superconducting disc sample with trapped magnetic flux distorted the field line distribution. As a result, the in...