Manifestation of the magnetic moments of Cooper pairs in low-temperature properties of superconducting thin-film rings

We argue that the intrinsic magnetic moments of the Cooper pairs can be detected in experiments with superconducting thin-film rings. At sufficiently low temperatures the magnetic field generated by the supercurrent, can cause the ordering of these magnetic moments. This magnetization of the superconductor produces changes in the supercurrent and magnetic induction distributions, the heat capacity and magnetic moment of the ring. It is shown how the intrinsic magnetic moment of the Cooper pairs can be extracted from low-temperature behaviors of these measurable quantities of the current-carrying rings made of the cuprate superconductors. Experimental determination of the magnetic moment of the Cooper pairs can shed light on the pairing symmetry in the HTC cuprates.