From magnetisation measurements we provide evidence that the ferromagnetic superconductor RuSr2GdCu2O8 with Tc=45 K and TM=137 K exhibits a sizeable diamagnetic signal at low temperature (T<Tms=30 K) and low magnetic field (H<30 Oe), corresponding to a bulk Meissner-phase. At intermediate temperatures, Tms<T<Tc, a spontaneous vortex phase forms which is characterized by unique thermal hysteresi...

Exact analytic solutions are presented for the magnetic moment and screening currents in the Meissner state of superconductor strips with rectangular cross section in a perpendicular magnetic field and/or with transport current. The extension to finite London penetration is achieved by an elegant numerical method which works also for disks. The surface current in the specimen corners diverges a...

The Meissner effect and associated perfect 'bulk' diamagnetism together with zero resistance and gap opening are characteristic features of the superconducting state. In the pseudogap state of cuprates, unusual diamagnetic signals and anomalous proximity effects have been detected, but a Meissner effect has never been observed. Here we probe the local diamagnetic response in the normal state of...

We calculate the Debye and Meissner masses of photons and gluons for a spin-one color superconductor in the polar and color-spin-locked phases as well as for a spin-zero color superconductor in the 2SC and color-flavor-locked phases. A general derivation for photon-gluon mixing is provided in terms of the QCD partition function. We show qualitatively and quantitatively which of the gauge bosons...