Plakhty, V. P., Wosnitza, J., Kulda, J., Brückel, T., Schweika, W., Visser, D., ...
Using a novel polarised neutron scattering technique, the critical exponents for the spin chirality and chiral susceptibility are determined for the triangular lattice antiferromagnet (TLA) CsMnBr3...
Three-Dimensional Spin Fluctuations in Na0.75CoO2 (2005)
Helme, L M, Boothroyd, A T, Coldea, R, Prabhakaran, D, Tennant, D A, Hiess, A, ...
Three-Dimensional Spin Fluctuations in Na0.75CoO2 (2004)
Helme, L. M., Boothroyd, A. T., Coldea, R., Prabhakaran, D., Tennant, D. A., Hiess, A., ...
We report polarized- and unpolarized-neutron scattering measurements of magnetic excitations in single-crystal Na0.75CoO2. The data confirm ferromagnetic correlations within the cobalt-layers and...
Magnetic excitations in La1.5Sr0.5CoO4 (2004)
Helme, L M, Boothroyd, A T, Prabhakaran, D, Wondre, F R, Frost, C D, Kulda, J
Kulda, J., Debernardi, A., Cardona, M., De Geuser, F., Haller, E. E.
We present ab initio calculations and spin-echo measurements of the anharmonic self-energy of phonons at the X point of the Brillouin zone for germanium. The mechanisms that contribute to these...
Magnetic excitations in La$_{1.5}$Sr$_{0.5}$CoO$_4$ (2003)
Helme, L. M., Boothroyd, A. T., Prabhakaran, D., Wondre, F. R., Frost, C. D., Kulda, J.
We report magnetization and neutron scattering measurements of the half-doped compound La$_{1.5}$Sr$_{0.5}$CoO$_4$, which exhibits a checkerboard pattern of charge ordering below ~800K. In the...
Spin correlations among the charge carriers in an ordered stripe phase (2003)
Boothroyd, A. T., Freeman, P. G., Prabhakaran, D., Hiess, A., Enderle, M., Kulda, J., ...
We have observed a diffuse component to the low-energy magnetic excitation spectrum of stripe-ordered La5/3Sr1/3NiO4 probed by neutron inelastic scattering. The diffuse scattering forms a square...
Magnetic Order and Dynamics in Stripe-Ordered La2-xSrxNiO4 (2003)
Boothroyd, A. T., Freeman, P. G., Prabhakaran, D., Enderle, M., Kulda, J.
We have studied magnetic correlations in several compositions of stripe-ordered La2-xSrxNiO4. In this paper we show how polarized-neutron scattering has helped uncover important features of the...
Anisotropy of the incommensurate fluctuations in Sr2RuO4: a study with polarized neutrons (2003)
Braden, M., Steffens, P., Sidis, Y., Kulda, J., Hayden, S., Kikugawa, N., ...
The anisotropy of the magnetic incommensurate fluctuations in Sr2RuO4 has been studied by inelastic neutron scattering with polarized neutrons. We find a sizeable enhancement of the out of plane...
Origin of the "Waterfall" Effect in Phonon Dispersion of Relaxor Perovskites (2003)
Hlinka, J., Kamba, S., Petzelt, J., Kulda, J., Randall, C. A., Zhang, S. J.
Inelastic neutron scattering study of the perovskite relaxor ferroelectric PZN:8%PT elucidates the origin of the previously reported unusual kink on the low frequency transverse phonon dispersion...
Anharmonic Self-Energy of Phonons: ab initio Calculations and Neutron Spin Echo Measurements (2003)
Debernardi, A., De Geuser, F., Kulda, J., Cardona, M., Haller, E. E.
Anharmonic Self-Energy of Phonons: Ab Initio Calculations and Neutron Spin Echo Measurements (2002)
Debernardi, A., De Geuser, F., Kulda, J., Cardona, M., Haller, E. E.
We have calculated (ab initio) and measured (by spin-echo techniques) the anharmonic self-energy of phonons at the X-point of the Brillouin zone for isotopically pure germanium. The real part agrees...
Spin dynamics in stripe-ordered La5/3Sr1/3NiO4 (2002)
Boothroyd, A. T., Prabhakaran, D., Freeman, P. G., Lister, S. J. S., Enderle, M., Hiess, A., ...
Polarized and unpolarized neutron inelastic scattering has been used to measure the spin excitations in the spin-charge-ordered stripe phase of La5/3Sr1/3NiO4. At high energies, sharp magnetic modes...
Inelastic neutron scattering study of magnetic excitations in Sr$_2$RuO$_4$ (2002)
Braden, M., Sidis, Y., Bourges, P., Pfeuty, P., Kulda, J., Mao, Z., ...
Magnetic excitations in \srruo ~ have been studied by inelastic neutron scattering. The magnetic fluctuations are dominated by incommensurate peaks related to the Fermi surface nesting of the...
Spin-wave spectrum of copper metaborate in the commensurate phase 10K (2002)
Boehm, M., Martynov, S., Roessli, B., Petrakovskii, G., Kulda, J.
We have investigated the spin-wave spectrum of copper metaborate, CuB$_2$O$_4$, by means of inelastic neutron scattering in the commensurate magnetic phase. We have found two branches of spin-wave...
Spin Fluctuations in the Underdoped High-Tc Cuprate La1.93Sr0.07CuO4 (2001)
Hiraka, H., Endoh, Y., Fujita, M., Lee, Y. S., Kulda, J., Ivanov, A., ...
We performed magnetic inelastic neutron-scattering experiments on La(1.93)Sr(0.07)CuO(4) over a wide range of E and T;2 < E < 44 meV and 1.5 < T < 300 K. The dynamic susceptibility X"(q,E) of this...
Spin chirality and polarised neutron scattering (2001)
Plakhty, V P, Maleyev, S V, Kulda, J, Visser, D, Woznitza, J, Moskvin, E V, ...
Spin chirality and polarised neutron scattering (2001)
Plakhty, V. P., Maleyev, S. V., Kulda, J., Visser, E. D., Wosnitza, J., Moskvin, E. V., ...
Chiral criticality in helimagnet Ho studied by polarized neutron scattering (2001)
Plakhty, V., Schweika, W., Brückel, T., Kulda, J., Gavrilov, S. V., Regnault, L.-P., ...
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A polarized neutron-scattering study of the Cooper-pair moment in Sr2RuO4 (2000)
Duffy, J. A., Hayden, S. M., Maeno, Y., Mao, Z., Kulda, J., McIntyre, G. J.
We report a study of the magnetization density in the mixed state of the unconventional superconductor S2RuO4. On entering the superconducting state we find no change in the magnitude or distribution...
Roton Lifetime Measurement in Superuid (2000)
E. Farhi, B. Fk, C. M. E. Zeyen, J. Kulda
High resolution measurements of the temperature dependence of the roton lifetime and energy shift in superuid 4 He have been performed using the IN20 thermal neutron Triple-Axis Spectrometer...
Aeppli, G., Mason, T. E., Hayden, S. M., Mook, H. A., Kulda, J.
Polarized and unpolarized neutron scattering was used to measure the wave vector- and frequency-dependent magnetic fluctuations in the normal state (from the superconducting transition temperature,...
Quadrupolar and magnetic transitions in UPd3 (1998)
McEwen, K A, Steigenberger, U, Clausen, K N, Kulda, J, Park, J-G, Walker, M B
Quadrupolar and magnetic structures of UPd3 (1998)
McEwen, K A, Steigenberger, U, Clausen, K N, Kulda, J, Park, J-G, Walker, M B
Proc Int Workshop on JHF Science (Tsukuba, Japan) III 186 (1998)
Effects of isotope disorder on energies and lifetimes of phonons in germanium. (1998)
Göbel, A., Wang, D. T., Cardona, M., Pintschovius, L., Reichardt, W., Kulda, J., ...
Kulda, J, Vojtĕchovská, M, Tachezy, J, Demes, P, Kunzová, E
Six isolates of a strain (MRP-MT) of Trichomonas vaginalis obtained from a woman before and after unsuccessful treatment with metronidazole had an appreciably lower susceptibility to metronidazole...