Itinerant spin excitations near the hidden order transition in URu2Si2 (2008)
Janik, J. A., Zhou, H. D., Balicas, L., MacDougall, G. J., Luke, G. M., ...
By means of neutron scattering we show that the high-temperature precursor to the hidden order state of the heavy fermion superconductor URu$_{2}$Si$_{2}$ exhibits heavily damped incommensurate...
Stock, C., Buyers, W. J. L., Yamani, Z., Tun, Z., Birgeneau, R. J., Liang, R., ...
Using neutron scattering we have determined the magnetic structure and fluctuations in the YBa2Cu3O6.35 superconductor (Tc=18 K). The long-range ordered collinear spins of the insulating...
Wiebe, C. R., Janik, J. A., Macdougall, G. J., Luke, G. M., Garrett, J. D., Zhou, H. D., ...
One of the primary goals of modern condensed matter physics is to elucidate the nature of the ground state in various electronic systems. Many correlated electron materials, such as high temperature...
Haravifard, S., Rule, K. C., Dabkowska, H. A., Gaulin, B. D., Yamani, Z., Buyers, W. J. L.
Single crystals of the lightly-doped spin-Peierls system Cu(1-x)Cd(x)GeO3 have been studied using bulk susceptibility, x-ray diffraction, and inelastic neutron scattering techniques. We investigate...
Incommensurate Spin Ordering and Fluctuations in underdoped La_{2-x}Ba_{x}CuO_{4} (2007)
Dunsiger, S. R., Zhao, Y., Yamani, Z., Buyers, W. J. L., Dabkowska, H., Gaulin, B. D.
Using neutron scattering techniques, we have studied incommensurate spin ordering as well as low energy spin dynamics in single crystal underdoped \LBCO with x$\sim$0.095 and 0.08; high temperature...
Orbital and Spin Excitations in Cobalt Oxide (2007)
Yamani, Z., Buyers, W. J. L., Cowley, R. A., Prabhakaran, D.
By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO (TN=290 K) up to 15 THz and for temperatures from 6 K to 450 K. Data were taken in the...
Antiferromagnetic correlations near the lower edge of superconducting dome in YBCO6+x (2007)
Yamani, Z., Buyers, W. J. L., Wang, F., Liang, R., Bonn, D., ...
Neutron scattering from high-quality YBCO6.334 single crystals with a T$_c$ of 8.4 K shows that there is no coexistence with long-range antiferromagnetic order at this very low, near-critical doping...
Evidence for decay of spin-waves above the pseudogap in underdoped YBa2Cu3O6.35 (2007)
Stock, C., Cowley, R. A., Buyers, W. J. L., Coldea, R., Broholm, C., Frost, C. D., ...
The magnetic spectrum at high-energies in heavily underdoped YBa$_{2}$Cu$_{3}$O$_{6.35}$ (T$_{c}$=18 K) has been determined throughout the Brillouin zone. At low-energy the scattering forms a cone of...
Buyers, W. J. L., Stock, C., Yamani, Z., Birgeneau, R. J., Liang, R., Bonn, D., ...
Magnetic spins and charges interact strongly in high-temperature superconductors. New physics emerges as layers of copper oxide are tuned towards the boundary of the superconducting phase. As the...
Stock, C., Buyers, W. J. L., Yamani, Z., Broholm, C., Tun, Z., ...
We have mapped the neutron scattering spin spectrum at low-energies in YBa2Cu3O6.353 (Tc=18 K) where the doping ~0.06 is near the critical value (pc=0.055) for superconductivity. No coexistence with...
Spin Trimer Antiferromagnetism in La4Cu3MoO12 (2005)
Qiu, Y, Broholm, C, Ishiwata, S, Azuma, M, Takano, M, Bewley, R, ...
Stock, C., Buyers, W. J. L., Cowley, R. A., Clegg, P. S., Coldea, R., Frost, C. D., ...
We have investigated the spin fluctuations at energy transfers up to ~110 meV, well above the resonance energy (33 meV) in the YBa2Cu3O6.5 ortho-II superconductor using neutron time-of-flight and...
Phase Decomposition and Chemical Inhomogeneity in Nd2-xCexCuO4 (2004)
Mang, P. K., Larochelle, S., Mehta, A., Vajk, O. P., Erickson, A. S., Lu, L., ...
Extensive X-ray and neutron scattering experiments and additional transmission electron microscopy results reveal the partial decomposition of Nd2-xCexCuO4 (NCCO) in a low-oxygen-fugacity environment...
Hidden orbital currents and spin gap in the heavy fermion superconductor URu$_2$Si$_2$ (2003)
Wiebe, C. R., Luke, G. M., Yamani, Z., Menovsky, A. A., Buyers, W. J. L.
We have performed neutron scattering experiments on the heavy fermion superconductor URu$_2$Si$_2$ to search for the orbital currents predicted to exist in the ordered phase below {\Tn} = 17.5 K....
Stock, C., Buyers, W. J. L., Liang, R., Peets, D., Tun, Z., Bonn, D., ...
We describe the relation between spin fluctuations and superconductivity in a highly-ordered sample of YBaCu3O6.5 using both polarized and unpolarized neutron inelastic scattering. The spin...
Top-Seeded Melt-Growth of YBa_2Cu_3O_x Crystals for Neutron Diffraction Studies (2002)
Peets, D. C., Liang, Ruixing, Stock, C., Buyers, W. J. L., Tun, Z., Taillefer, L., ...
We have grown cubic centimetre-size crystals of YBa2Cu3Ox suitable for neutron studies, by a top-seeded melt-growth technique. Growth conditions were optimized with an eye toward maximizing phase...
Van Duijn, J., Gaulin, B. D., Lumsden, M. A., Buyers, W. J. L.
Critical neutron scattering measurements have been performed on CsCo$_{0.83}$Mg$_{0.17}$Br$_3$, a dilute stacked triangular lattice (STL) Ising antiferromagnet (AF). A two component lineshape...
Spin-Trimer Antiferromagnetism in La$_4$Cu$_3$MoO$_{12}$ (2002)
Qiu, Y., Broholm, C., Ishiwata, S., Azuma, M., Takano, M., Bewley, R., ...
La$_4$Cu$_3$MoO$_{12}$ is a cluster antiferromagnet where copper spin-1/2 form a network of st rongly coupled spin-trimers. The magnetic properties of this material have bee n examined using magnetic...
Neutron scattering search for static magnetism in oxygen ordered YBa2Cu3O6.5 (2002)
Stock, C., Buyers, W. J. L., Tun, Z., Liang, R., Peets, D., Bonn, D., ...
We present elastic and inelastic neutron scattering results on highly oxygen ordered YBa2Cu3O6.5 ortho-II. We find no evidence for the presence of ordered magnetic moments to a sensitivity of 0.003...
Wakimoto, S., Stock, C., Birgeneau, R. J., Chen, W., Buyers, W. J. L., ...
Neutron scattering measurements of the lowest-energy TO phonons in the relaxor Pb(Mg1/3Nb2/3)O3 (PMN) are reported for 10
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., Coldea, R., Enderle, M., McMorrow, D. F.
We have mapped from the quantum to the classical limit the spin excitation spectrum of the antiferromagnetic spin-1 Heisenberg chain system CsNiCl3 in its paramagnetic phase from T=5 to 200K. Neutron...
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., Tun, Z., Coldea, R., Enderle, M.
We report inelastic time-of-flight and triple-axis neutron scattering measurements of the excitation spectrum of the coupled antiferromagnetic spin-1 Heisenberg chain system CsNiCl3. Measurements...
Multiparticle states in the S=1 chain system CsNiCl3 (2001)
Kenzelmann, M, Cowley, R A, Buyers, W J L, Coldea, R, Gardner, J S, Enderle, M, ...
New results on the excitations of an S=1 quantum chain (2001)
Cowley, R A, Kenzelmann, M, Buyers, W J L, McMorrow, D F, Coldea, R, Enderle, M
Temperature Evolution of the Quantum Gap in CsNiCl3 (2000)
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., McMorrow, D. F.
Neutron scattering measurements on the one-dimensional gapped S=1 antiferromagnet, CsNiCl3, have shown that the excitation corresponding to the Haldane mass gap Delta at low temperatures persists as...
Multi-particle States in Spin-1 Chain System CsNiCl3 (2000)
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., Coldea, R., Gardner, J. S., Enderle, M., ...
A continuum of magnetic states has been observed by neutron scattering from the spin-1 chain compound CsNiCl3 in its disordered gapped one-dimensional phase. Results using both triple-axis and...
Neutron scattering study of CeTe2 (2000)
Park, J-G, Kwon, Y S, Kockelmann, W, Bull, M J, Swainson, I P, McEwen, K A, ...
Spin glass behavior in URh2Ge2 (1997)
Suellow, S., Mentink, S.A.M., Mason, T.E., Buyers, W.J.L., Nieuwenhuys, G.J., Menovsky, A.A., ...
Spin glass behavior in URh_2Ge_2 (1996)
Sullow, S., Nieuwenhuys, G. J., Menovsky, A. A., Mydosh, J. A., Mentink, S. A. M., Mason, T. E., ...
URh_2Ge_2 occupies an extraordinary position among the heavy-electron 122-compounds, by exhibiting a previously unidentified form of magnetic correlations at low temperatures, instead of the usual...
Influence of a magnetic field on the antiferromagnetic order in UPt_3 (1996)
Lussier, B., Taillefer, L., Buyers, W. J. L., Mason, T. E., Petersen, T.
A neutron diffraction experiment was performed to investigate the effect of a magnetic field on the antiferromagnetic order in the heavy fermion superconductor UPt_3. Our results show that a field in...
The Ising-Kondo lattice with transverse field: an f-moment Hamiltonian for URu2Si2? (1996)
Sikkema, A. E., Buyers, W. J. L., Affleck, I., Gan, J.
We study the phase diagram of the Ising-Kondo lattice with transverse magnetic field as a possible model for the weak-moment heavy-fermion compound URu2Si2, in terms of two low-lying f singlets in...
Magnetic fluctuations in heavy-fermion metals (1995)
Mason, T.E., Petersen, T., Aeppli, G., Buyers, W.J.L., Bucher, E., Garret, J.D., ...
Non-trivial magnetic order in URu2Si2? (1995)
Mason, T.E., Buyers, W.J.L., Peterson, T., Menovsky, A.A., Garret, J.D.
The transition in the heavy-fermion system URu2Si2: spin or multipolar? (1994)
Walker, M.B., Tun, Z., Buyers, W.J.L., Menovsky, A.A., Que, W.
Spin wave collapse and incommensurate fluctuations in URu2Si2 (1994)
Buyers, W.J.L., Tun, Z., Peterson, T., Mason, T.E., Lussier, J.G., Gaulin, B.D., ...
Nature of the order-parameter in the heavy-fermion system Uru2si2 (1993)
Walker, M.B., Buyers, W.J.L., Tun, Z., Que, W., Menovsky, A.A., Garrett, J.D.
Magnetic Excitations in the Heavy-Fermion Superconductor Uru2si2 (1991)
Broholm, C., Lin, H., Matthews, P.T., Mason, T.E., Buyers, W.J.L., Collins, M.F., ...
Magnetic Excitations and Ordering in the Heavy-Electron Superconductor URu2Si2 (1987)
Broholm, C., Kjems, J.K., Buyers, W.J.L., Matthews, P., Palstra, T.T.M., Menovsky, A.A., ...
Neutron scattering demonstrates the coexistence of antiferromagnetic order and superconductivity below 1 K in the heavy-electron system URu2Si2. It is found that the upper (17.5 K) transition is to...
The temperature diffuse scatterling of X-rays from single crystals [microform] / (1963)
Thesis (doctoral)--University of Aberdeen, 1963.