Now showing items 1-5 of 5
Quantum criticality in an organic magnet
(American Physical Society, 2006-06-30)
Exchange interactions between S=½ sites in piperazinium hexachlorodicuprate produce a frustrated bilayer magnet with a singlet ground state. We have determined the field-temperature phase diagram by high field magnetization ...
Field dependence of magnetic ordering in Kagome-staircase compound Ni3V2O8
(American Physical Society, 2006-07-01)
We present powder and single-crystal neutron diffraction and bulk measurements of the Kagome-staircase compound Ni3V2O8 (NVO) in fields up to 8.5 T applied along the c direction. (The Kagome plane is the a-c plane.) This ...
Spin-lattice order in frustrated ZnCr2O4
(American Physical Society, 2009-07-17)
Using synchrotron x-ray and neutron diffraction, we disentangle spin-lattice order in highly frustrated ZnCr2O4 where magnetic chromium ions occupy the vertices of regular tetrahedra. Upon cooling below 12.5 K the quandary ...
Neutron scattering from a coordination polymer quantum paramagnet
(American Physical Society, 2006-09-01)
Inelastic neutron scattering measurements are reported for a powder sample of the spin-1/2 quantum paramagnet Cu(quinoxaline)Br2. Magnetic neutron scattering is identified above an energy gap of 1.9 meV. Analysis of the ...
Anisotropic three-dimensional magnetism in CaFe2As2
(American Physical Society, 2008-11-28)
Inelastic neutron scattering measurements of the magnetic excitations in CaFe2As2 indicate that the spin wave velocity in the Fe layers is exceptionally large and similar in magnitude to the cuprates. However, the spin ...