Ch. Niedermayer

Coexistence of ferromagnetism and superconductivity in the hybrid ruthenate-cuprate compound RuSr 2 GdCu 2 O 8 studied by muon spin rotation and dc magnetization

We have investigated the magnetic and the superconducting properties of the hybrid ruthenate-cuprate compound

Coupled Superconducting and Magnetic Order in CeCoIn5

{\mathrm{RuSr}}_{2}{\mathrm{GdCu}}_{2}{\mathrm{O}}_{8}

Coexistence of static magnetism and superconductivity in SmFeAsO 1− x F x as revealed by muon spin rotation

by means of zero-field muon-spin rotation (ZF-\ensuremath{\mu}SR) and dc magnetization measurements. The dc-magnetization data established that this material exhibits ferromagnetic order of the Ru moments [\ensuremath{\mu}(Ru)\ensuremath{\approx}1

Electronic Phase Separation in the Slightly Underdoped Iron Pnictide Superconductor Ba1-xKxFe2As2

{\ensuremath{\mu}}_{B}]

Dependence of the Nèel-temperatures of La2CuO4 on Sr-doping studied by muon spin rotation

below

Bose-Einstein condensation of S = 1 nickel spin degrees of freedom in NiCl2-4SC(NH2)2.

{T}_{C}=133

Anomalous Peak in the Superconducting Condensate Density of Cuprate High-Tc Superconductors at a Unique Doping State

K and becomes superconducting at a much lower temperature

Giant superconductivity-induced modulation of the ferromagnetic magnetization in a cuprate–manganite superlattice

{T}_{c}=16

A different type of oxygen order in RE Ba2Cu3O(6+x) HTc superconductors with different RE ionic radii

K. The ZF-\ensuremath{\mu}SR experiments indicate that the ferromagnetic phase is homogeneous on a microscopic scale and accounts for most of the sample volume. They also suggest that the magnetic order is not significantly modified at the onset of superconductivity.

Momentum-resolved superconducting gap in the bulk of Ba1−xKxFe2As2 from combined ARPES and μSR measurements

Strong magnetic fluctuations can provide a coupling mechanism for electrons that leads to unconventional superconductivity. Magnetic order and superconductivity have been found to coexist in a number of magnetically mediated superconductors, but these order parameters generally compete. We report that close to the upper critical field, CeCoIn5 adopts a multicomponent ground state that simultaneously carries cooperating magnetic and superconducting orders. Suppressing superconductivity in a first-order transition at the upper critical field leads to the simultaneous collapse of the magnetic order, showing that superconductivity is necessary for the magnetic order. A symmetry analysis of the coupling between the magnetic order and the superconducting gap function suggests a form of superconductivity that is associated with a nonvanishing momentum.