Zobrazeno 1 - 10
of 622
pro vyhledávání: '"Lumsden, M A"'
Incident Beamline Design for a Modern Cold Triple Axis Spectrometer at the High Flux Isotope Reactor
Autor:
Granroth, G. E., Daum, M., Aczel, A. A., Williams, T. J., Winn, B., Fernandez-Baca, J. A., Mourigal, M., Lumsden, M. D.
Publikováno v:
Nuclear Inst. and Methods in Physics Research, A 1064 (2024) 169440
A modern cold triple axis spectrometer is being planned for the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory. Here, we describe the design of an incident beamline that will put a flux of $\sim 10^8\mathrm{\frac{n}{cm^2 s}}$ on a
Externí odkaz:
http://arxiv.org/abs/2402.01626
Autor:
Sala, G., Stone, M. B., Rai, Binod K., May, A. F., Laurell, Pontus, Garlea, V. O., Butch, N. P., Lumsden, M. D., Ehlers, G., Pokharel, G., Mandrus, D., Parker, D. S., Okamoto, S., Halász, Gábor B., Christianson, A. D.
The magnetic excitation spectrum of the quantum magnet YbCl$_3$ is studied with inelastic neutron scattering. The spectrum exhibits an unusually sharp feature within a broad continuum, as well as conventional spin waves. By including both transverse
Externí odkaz:
http://arxiv.org/abs/2003.01754
Crystal field splitting, local anisotropy, and low energy excitations in the quantum magnet YbCl$_3$
Autor:
Sala, G., Stone, M. B., Rai, Binod K., May, A. F., Parker, D. S., Halász, Gábor B., Cheng, Y. Q., Ehlers, G., Garlea, V. O., Zhang, Q., Lumsden, M. D., Christianson, A. D.
Publikováno v:
Phys. Rev. B 100, 180406 (2019)
We study the correlated quantum magnet, YbCl$_3$, with neutron scattering, magnetic susceptibility, and heat capacity measurements. The crystal field Hamiltonian is determined through simultaneous refinements of the inelastic neutron scattering and m
Externí odkaz:
http://arxiv.org/abs/1907.10627
Autor:
Podlesnyak, A., Loguillo, M., Rucker, G. M., Haberl, B., Boehler, R., Ehlers, G., Daemen, L. L., Armitage, D., Frontzek, M. D., Lumsden, M.
Publikováno v:
High Pressure Research, 38, 482 (2018)
A clamp pressure cell for neutron scattering experiments at low temperatures and in external magnetic fields under pressure up to 2~GPa has been fabricated and tested. The cell provides optical access to the sample space that allows instantaneous pre
Externí odkaz:
http://arxiv.org/abs/1904.11529
Autor:
Wu, L. S., Nikitin, S. E., Brando, M., Vasylechko, L., Ehlers, G., Frontzek, M., Savici, A. T., Sala, G., Christianson, A. D., Lumsden, M. D., Podlesnyak, A.
Publikováno v:
Phys. Rev. B 99, 195117 (2019)
In this paper we report low-temperature magnetic properties of the rare-earth perovskite material YbAlO$_3$. Results of elastic and inelastic neutron scattering experiment, magnetization measurements along with the crystalline electrical field (CEF)
Externí odkaz:
http://arxiv.org/abs/1904.11513
Autor:
Wu, L. S., Nikitin, S. E., Wang, Z., Zhu, W., Batista, C. D., Tsvelik, A. M., Samarakoon, A. M., Tennant, D. A., Brando, M., Vasylechko, L., Frontzek, M., Savici, A. T., Sala, G., Ehlers, G., Christianson, A. D., Lumsden, M. D., Podlesnyak, A.
Publikováno v:
Nature Communications (2019) 10:698
Low dimensional quantum magnets are interesting because of the emerging collective behavior arising from strong quantum fluctuations. The one-dimensional (1D) S = 1/2 Heisenberg antiferromagnet is a paradigmatic example, whose low-energy excitations,
Externí odkaz:
http://arxiv.org/abs/1902.04112
Autor:
Rau, J. G., Wu, L. S., May, A. F., Taylor, A. E., Liu, I-Lin, Higgins, J., Butch, N. P., Ross, K. A., Nair, H. S., Lumsden, M. D., Gingras, M. J. P., Christianson, A. D.
Publikováno v:
J. Phys.: Condens. Matter 30, 455801 (2018)
The breathing pyrochlore lattice material Ba$_3$Yb$_2$Zn$_5$O$_{11}$ exists in the nearly decoupled limit, in contrast to most other well-studied breathing pyrochlore compounds. As a result, it constitutes a useful platform to benchmark theoretical c
Externí odkaz:
http://arxiv.org/abs/1809.05131
Autor:
Sala, G., Stone, M. B., Rai, B. K., May, A. F., Cruz, C. R. Dela, Arachchige, H. Suriya, Ehlers, G., Fanelli, V. R., Garlea, V. O., Lumsden, M. D., Mandrus, D., Christianson, A. D.
Publikováno v:
Phys. Rev. Materials 2, 114407 (2018)
We have studied the physical properties of Nd$_2$O$_3$ with neutron diffraction, inelastic neutron scattering, heat capacity, and magnetic susceptibility measurements. Nd$_2$O$_3$ crystallizes in a trigonal structure, with Nd$^{3+}$ ions surrounded b
Externí odkaz:
http://arxiv.org/abs/1808.10085
Autor:
Nikitin, S. E., Wu, L. S., Sefat, A. S., Shaykhutdinov, K. A., Lu, Z., Meng, S., Pomjakushina, E. V., Conder, K., Ehlers, G., Lumsden, M. D., Kolesnikov, A. I., Barilo, S., Guretskii, S. A., Inosov, D. S., Podlesnyak, A.
Publikováno v:
Phys. Rev. B 98, 064424 (2018)
In this paper we present a comprehensive study of magnetic dynamics in the rare-earth orthoferrite YbFeO$_3$ at temperatures below and above the spin-reorientation (SR) transition $T_{\mathrm{SR}}=7.6$ K, in magnetic fields applied along the $a, b$ a
Externí odkaz:
http://arxiv.org/abs/1808.01269
Autor:
Taylor, A. E., Morrow, R., Lumsden, M. D., Calder, S., Upton, M. H., Kolesnikov, A. I., Stone, M. B., Fishman, R. S., Paramekanti, A., Woodward, P. M., Christianson, A. D.
Publikováno v:
Phys. Rev. B 98, 214422 (2018)
Sr$_2$FeOsO$_6$ is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 K ($T_{N1}$) and 67 K ($T_{N2}$). To study the underlying electronic and magnetic interactions giving rise to this behavior we have perfo
Externí odkaz:
http://arxiv.org/abs/1805.00543