The coexistence of ferromagnetism and superconductivity is a rare and surprising phenomenon. Three resent studies carried out in INAC help understand the pairing mechanism is these systems.
In the context of the study of the interplay between magnetism and superconductivity, a phase transition has been evidenced as a function of magnetic field between two phases having identical magnetic symmetry.
In a metal the energy levels of the electrons, which have to be all in different quantum states due to the Pauli exclusion principle, are filled up to the Fermi energy at zero temperature.
Combined extreme conditions of high pressure and strong magnetic field are an extremely powerful tool to tune microscopic interactions in order to attain and study new states of matter.
The june-august issue of C.R.


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