Neutron scattering measurements were used to investigate the magnetic and crystal structure and magnetic excitations of three compounds characterized as low-dimensional quantum magnets. The materials are frustrated systems with low spin quantum number. The first was a powder sample of AgNiO2. The Ni ions form a triangular lattice antiferromagnet in which, according to the published crystal structure, both the orbital order and magnetic couplings are frustrated. However, it is shown here that there was a small distortion of the crystal structure at 365 K, which is proposed to result from charge disproportionation and this relieves the orbital frustration. The magnetic structure was investigated and, below 20 K, the triangular lattice of elec...
We study the strongly anisotropic quasi-one-dimensional S = 1 quantum magnet NiCl2 center dot 4SC(NH...
In Ag2CoO2, Co forms triangular lattice layers, which are separated by the metallic (Ag-2) block. Th...
Low temperature inelastic neutron scattering studies have been performed to characterize the low ene...
Low-dimensional magnets with low-spin quantum numbers are ideal model systems for investigating stro...
The identification and characterisation of low-dimensional and frustrated magnetic systems is an are...
This thesis presents studies of the spin dynamics in quantum magnets using inelastic neutron scatter...
Inelastic neutron scattering was used to study the magnetic excitation spectrum of three quantum ma...
Inelastic neutron scattering was used to study the magnetic excitation spectrum of three quantum ma...
This thesis presents neutron scattering studies of three correlated electron systems, each of which ...
This thesis describes neutron scattering experiments on strongly correlated systems exhibiting a ran...
Antiferromagnetic insulators at low temperatures offer a clean arena to study non-semiclassical phen...
Quantum magnetism is a rich area of hard condensed matter physics where various energy scales and ex...
An unambiguous realization of quantum spin liquid, characterized by fractionalized excitations and n...
Anisotropic spin interactions beyond simple Heisenberg models have been intensively studied in recen...
This thesis describes investigations of the effects of low dimensionality on two different antiferro...
We study the strongly anisotropic quasi-one-dimensional S = 1 quantum magnet NiCl2 center dot 4SC(NH...
In Ag2CoO2, Co forms triangular lattice layers, which are separated by the metallic (Ag-2) block. Th...
Low temperature inelastic neutron scattering studies have been performed to characterize the low ene...
Low-dimensional magnets with low-spin quantum numbers are ideal model systems for investigating stro...
The identification and characterisation of low-dimensional and frustrated magnetic systems is an are...
This thesis presents studies of the spin dynamics in quantum magnets using inelastic neutron scatter...
Inelastic neutron scattering was used to study the magnetic excitation spectrum of three quantum ma...
Inelastic neutron scattering was used to study the magnetic excitation spectrum of three quantum ma...
This thesis presents neutron scattering studies of three correlated electron systems, each of which ...
This thesis describes neutron scattering experiments on strongly correlated systems exhibiting a ran...
Antiferromagnetic insulators at low temperatures offer a clean arena to study non-semiclassical phen...
Quantum magnetism is a rich area of hard condensed matter physics where various energy scales and ex...
An unambiguous realization of quantum spin liquid, characterized by fractionalized excitations and n...
Anisotropic spin interactions beyond simple Heisenberg models have been intensively studied in recen...
This thesis describes investigations of the effects of low dimensionality on two different antiferro...
We study the strongly anisotropic quasi-one-dimensional S = 1 quantum magnet NiCl2 center dot 4SC(NH...
In Ag2CoO2, Co forms triangular lattice layers, which are separated by the metallic (Ag-2) block. Th...
Low temperature inelastic neutron scattering studies have been performed to characterize the low ene...