Alexandre Desilets-Benoit

Evidence for SrHo2O4 and SrDy2O4 as model J1-J2 zigzag chain materials

Neutron diffraction and inelastic spectroscopy is used to characterize the magnetic Hamiltonian of SrHo2O4 and SrDy2O4. Through a detailed computation of the crystal-field levels we find site- dependent anisotropic single-ion magnetism in both materials and diffraction measurements show the presence of strong one-dimensional spin correlations. Our measurements indicate that competing interactions of the zig-zag chain, combined with frustrated interchain interactions, play a crucial role in stabilizing spin-liquid type correlations in this series.

Field dependence of the magnetic correlations of the frustrated magnet SrDy2O4

The frustrated magnet SrDy

Absence of long-range order in the frustrated magnet SrDy2O4 due to trapped defects from a dimensionality crossover

_2

Evidence for Magnetic Polarons in EuB 6 from Small Angle Neutron Scattering

O

Absence of long range order in SrDy

_4

_2

exhibits a field-induced phase with a magnetization plateau at

O

1/3

_4

of the saturation value for magnetic fields applied along the

frustrated magnet due to trapped defects from a dimensionality crossover

b

Magnetic Polarons in EuB6

-axis. We report here a neutron scattering study of the nature and symmetry of the magnetic order in this field-induced phase. Below