E. J. Ansaldo

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

First observation of an antiferromagnetic phase in the Y1Ba2Cu3Ox system

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

Hidden magnetic transitions in the thermoelectric layered cobaltite [Ca2CoO3]0.62[CoO2]

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

Static magnetic order in Na 0.75 CoO 2 detected by muon spin rotation and relaxation

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

μ+SR Studies of Magnetic Properties of the YBa2Cu3Ox System

below

Appearance of a two-dimensional antiferromagnetic order in quasi-one-dimensional cobalt oxides

{T}_{C}=133

Quantum diffusion of the positive muon in the superconducting state of Al

K and becomes superconducting at a much lower temperature

Site of the positive muon in YBa2Cu3O7

{T}_{c}=16

Electronic phase-purity in La2-xSrxCuO4- delta.

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.

Spin dynamics in crystalline and amorphous DyAg

The magnetic properties of four different phases of the YBa2Cu3Ox system, including the famous 90 K superconductor, have been probed by the positive muon spin relaxation method (µ+SR). The oxygen-deficient tetragonal insulating phase (x~6.2) was found to be magnetically ordered, thus most likely antiferromagnetic, near room temperature.