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15 papers · 2 filters
Structural properties of the geometrically frustrated pyrochlore Tb2Ti2O7
S. -W. Han, J. S. Gardner, C. H. Booth
Although materials that exhibit nearest-neighbor-only antiferromagnetic interactions and geometrical frustration theoretically should not magnetically order in the absence of disor…
Orbital and spin chains in ZnV2O4
S. -H. Lee, D. Louca, H. Ueda +8
Our powder inelastic neutron scattering data indicate that \zvo is a system of spin chains that are three dimensionally tangled in the cubic phase above 50 K due to randomly occupi…
Distribution of exchange energy in a bond-alternating S=1 quantum spin chain
A. Zheludev, T. Masuda, B. Sales +4
The quasi-one-dimensional bond-alternating S=1 quantum antiferromagnet NTENP is studied by single crystal inelastic neutron scattering. Parameters of the measured dispersion relati…
Neutron scattering study of the effects of dopant disorder on the superconductivity and magnetic order in stage-4 La_2CuO_{4+y}
Y. S. Lee, F. C. Chou, A. Tewary +3
We report neutron scattering measurements of the structure and magnetism of stage-4 La_2CuO_{4+y} with T_c ~42 K. Our diffraction results on a single crystal sample demonstrate tha…
Landau Expansion for the Kugel-Khomskii Hamiltonian
A. B. Harris, Amnon Aharony, O. Entin-Wohlman +2
The Kugel-Khomskii (KK) Hamiltonian for the titanates describes spin and orbital superexchange interactions between ions in an ideal perovskite structure in which the three $…
Effect of a magnetic field on the long-range magnetic order in insulating Nd2CuO4, nonsuperconducting and superconducting Nd1.85Ce0.15CuO4
M. Matsuura, Pengcheng Dai, H. J. Kang +5
We have measured the effect of a c-axis aligned magnetic field on the long-range magnetic order of insulating Nd2CuO4, as-grown nonsuperconducting and superconducting Nd1.85Ce0.15C…