The paper deals with magnetic shields for distribution systems mainly devoted to MV/LV substation. In the category of passive system, a new multilayer shielding plate is presented. The main purpose of the proposed solution is the reduction of the gap between the ferromagnetic sheets by a proper overlapping in order to reduce the local leakage fluxes. Plates characterised by different conductive...

Using the renormalization group method, new type of fluctuation-driven first order phase transitions and critical phenomena are predicted for certain classes of ferromagnetic superconductors and superfluids with unconventional (spin-triplet) Cooper pairing. The problem for the quantum phase transitions at extremely low and zero temperatures is also discussed. The results can be applied to a wid...

With the help of a Landau free energy we discuss the phase transition from an isotropic ferrofluid to a nematic one. The latter can be either superparamagnetic or ferromagnetic. The transitions are first order and the ferromagnetic state can be reached directly from the isotropic one or via the superparamagnetic nematic one. An external magnetic field induces magnetic as well as nematic order. ...